A principle challenge in performing measurements is to accurately remove the effects of the test fixture. Copper Mountain Technologies presents a simplified way to automatically remove the fixture effects to characterize SMD components using advanced algorithms with a Vector Network Analyzer.
This session will showcase Analog Devices' Stingray analog and hybrid beam-forming RF development kit. Focusing on the RF section of an X/Ku band phased array system, the developer's kit consists of 32 TR Modules (ADTR1107), arranged in a 10 GHz lattice spacing, and driven by 8 4-channel beam-former ICs (ADAR1000). Snap-on antenna boards can be attached to facilitate over-the-air testing. Alternatively, with the antenna boards removed, the system can be electrically tested. Results of electrical and Over-the-Air testing will be presented.
In the last decade, there has been a significant increase in wireless data requirements, resulting in a demand for high bandwidth, multi-Gbps, short-range wireless applications. Efforts by consortium's, such as WiGig and IEEE 802.11ad, to establish a 60 GHz wireless ecosystem would increase consumer product development for this market exponentially. To achieve such high throughput systems, high-gain phased array antennas would be desirable for achieving higher spatial coverage. In this presentation, we discuss analyzing and optimizing an aperture coupled patch antenna array with a compact feeding network for operation in 60 GHz band using Remcom’s full-wave electromagnetic simulation product, XFdtd®.
The aim of the TinyRad was to provide a platform to those potentially without in-depth RF or microwave knowledge to be able to evaluate and implement a radar system.
An engineer or software developer can use the TinyRad kit as a platform to take the supplied code and create optimised radar algorithms. The board design files are also supplied for developing the complete radar solution.
This presentation is an overview on how the TinyRad system can be used as a tool and reference design to be utilised to simplify the development of a radar solution, for a range of applications.
Phased arrays are becoming increasingly more prevalent throughout aerospace and defense and 5G. The push towards more advanced hybrid beamforming and every element digital drives channel counts of these phased arrays higher while demanding that channel density and size be reduced. The industry is moving to phased array platforms with large channel counts and needs to miniaturize channel footprint and maximize channel performance. This session will discuss a system prototyping platform (including hardware and software) that enables engineers to evaluate phased array systems with 16 transmit and 16 receive channels operating at S-Band.
This paper presents the design approach, realization and measurement results of a compact multi-stages 3-way fully integrated Doherty MMIC 40W power amplifier for 5G communication using LDMOS technology. Those results are achieved thanks to the Cds cancellation technic for the combiner design to achieve wideband impedance transformation combined with the 3-way DPA architecture to reach high efficiency and reduce load modulation. Through this paper a new coupling simulation flow is illustrated to limit risks linked to design compactness. After digital pre-distortion ACLR of -47dBc are measured for 160MHz modulated signal at 8dB OBO, while efficiency is above 46.9%.
The Doherty Amplifier represents the benchmark for energy efficient, quasi-linear, power amplification. But for 5G, SatCom or any other application demanding high performance and reproducibility, the challenges remain the same: how can you be sure that you are getting the maximum possible performance from the design and how can you evaluate its sensitivities and variations for series production?
During this session we will describe how, measuring the Doherty Amplifier as a dual-input device provides the designer with a hitherto unattainable visibility, enabling them to make the best design choices based on evidence, preparing for volume production with insight.
RF front end (RFFE) has become more complex with the evolving 5G wireless standard. System-in-Package (SiP) approach to integrate multiple dies and passives into one package is a viable solution to address the RFFE challenge. However, IC design and package are typically divided efforts. Crossing the boundary is sometimes tedious and error-prone. Enabling IC designers to assess the package effect anytime in their design flow is highly desired. A fully-integrated flow with IC-package co-simulation enabled will be presented. The accelerated solver engine offers an order of magnitude speedup compared to competitor solutions. Benchmark examples demonstrate the accuracy and efficiency.
Power handling is important to consider when designing RF systems. Both active and passive devices have a role in an RF system’s power handling capabilities. That capability is a function of the device and system’s ability to dissipate heat under load. DLI, Knowles, has conducted power measurements on a range of catalog and custom designed devices. The power handling of these microwave passives have been found to be tens of watts and often exceed 40 Watts at operational temperatures of 85°C.
This panel of semiconductor experts will address the best semiconductor device technologies and architectures for 5G mmWave applications. The panel will discuss and debate RF SOI versus CMOS versus GaAs versus GaN for semiconductor device materials and the tradeoffs for levels of integration, cost, efficiency, and thermal considerations associated with various architectures.
The panel session will be organized by Pat Hindle of Microwave Journal.
Potential panelists include experts from Globalfoundries, Qorvo, ADI, WIN, Soitec, MACOM, Skyworks, Qualcomm, Mixcomm, Mobile Experts, Anokiwave, etc.
Many designs are accomplished with basic RF/Microwave building blocks. One of the basic building blocks often used is the quadrature hybrid couplers. It offers an equal power split between the 2 output legs which is often desired. This can be achieved in several ways which include resistive dividers, Wilkinson dividers, and quadrature hybrid couplers. Of the many ways to achieve equal power split, the most direct way to achieve a 90 degree offset is with a quadrature hybrid coupler.
Satellite based communications solutions offer the ability to provide communications coverage over large geographical areas not served by ground-based infrastructure. A number of competing architectures for implementing 3GPP standards over satellite each have with their own merits. We discuss these architectures and the challenges with their network implementation and the considerations required for deployment.
DLI has a variety of high permittivity ceramics. This allows the RF designers to create passive components that are fundamentally smaller in size than traditional industry standard ceramics like Alumina, AlN, Fused Silica, etc.
DLI not only designs single element passive components such as filters, couplers, power dividers, but they regularly integrate multiple components on a single chip. This helps to improve phase control, real estate usage, and number of parts placed on a PCB. The use of high K material also helps DLI specialize in making wideband devices where increasing the number of sections equates to broader band performance.
Impedance-matching networks ensure optimum amplifier efficiency, linearity, and noise performance, as well as maximum power delivery between components. Recent advances in network synthesis technology provide RF designers with a powerful new tool to generate optimal impedance-matching circuits that tackle aggressive performance goals. This presentation examines the challenges of meeting multiple impedance-matching circuit goals over bandwidth, with practical, physically realizable solutions using network synthesis along with commercial SMT component simulation models.
Determining exact resonator, probe and iris geometries necessary for meeting specific filter requirements frequently results in time consuming iterative design efforts. An automated tool converting coupling matrix coefficients into accurate physical dimensions proves not only beneficial for novice or casual filter designers, even seasoned developers will experience a significant reduction in design time. Mician Filter Workbench requires minimal user input and can be utilized for synthesizing Chebyshev and quasi-elliptic function filters, inline or folded, in waveguide, combline, stripline or user specific configuration.
Highly accurate calculation of EM shielding effectiveness in WIPL-D software package will be presented. Surface equivalence theorem and additional advanced techniques have been implemented in WIPL-D numerical engine for very accurate modeling of shielding effectiveness beyond 250 dB. Examples selected for this particular demonstration include: 1. Conductive spherical shell, where results calculated using WIPL-D will be compared with results obtained using analytical procedure; 2. EM field penetration through the shielding of a coaxial cable; 3. Emulation of EM shielding measurement complying to two standards: MIL-DTL-83528 and Parker Chomerics CHO TP08.
Amplifier modeling is a critical part in system level simulation tools. As signal bandwidths increase and amplifiers are driven near compression for better PAE, however, typical models tend to fall apart. More information can be added to a lookup table-based amplifier model such as intermodulation and harmonic power levels to better predict results, but such information may be difficult to obtain. In this presentation several system-level amplifier models will be presented and the pros and cons discussed. The presentation will center around the needs of PA designers that have to spec their designs relative to ACPR and EVM measurements.
This presentation will discuss some advantages of novel FET based limiter approaches include both E-mode and PIN limiters fabricated on the same semiconductor processes used for low noise and distributed amplifiers. We will discuss the particulars of each type of limiter as well as its relative advantages and disadvantages.
RF Engineers direct a lot of attention to amplifier design details, and usually navigate the most difficult aspects successfully. But we often neglect to apply the same focus to the bias and decoupling components. If treated as an afterthought, these networks can cause excess noise, oscillation, low power, low gain, and non-linearities to appear in an otherwise fine effort. Through real-world examples this paper will review and illustrate typical pitfalls and highlight good design practices.
A talk about 2020 advancement made in Thin Film Technology for realization of miniature passive filters and Time Domain Solutions
Amplifier phase noise is becoming an increasingly important metric when considering low phase noise microwave systems. This seminar aims to demonstrate phase noise measurement practices that improve reliability and accuracy in an otherwise difficult measurement. Driver/DUT amplifier compression levels, power supply AM noise, harmonic filtering, proper grounding, and DUT-LO input power levels are all variables that require optimization to ensure accurate and reliable measurements. Amplifier phase noise will also be compared to oscillator phase noise, developing an intuition of when amplifier phase noise should be considered in a microwave system.
Designers are successfully simulating critical structures in silicon RFICs and PCBs using the AXIEM EM simulator. Si chips have layout features such as sub-nm z-dimensions, large via arrays in the RF path, metal mesh ground planes, and interdigitated stacked metal that cause problems for EM simulators. Complex PCB geometries typically have several signal and ground layers, many nets, and several many surface-mount parts, making them challenging to simulate efficiently as well. This presentation illustrates how new features in the AXIEM simulator have been specifically developed to address these problems while maintaining simulation speed and accuracy as well as design efficiency.
As designs become more and more complicated, modern semiconductor processes are getting more complex and advanced. Sonnet addresses ease of use for EM simulation for these processes with the new and highly scalable Sonnet Technology File (.STF), which can include information needed to simulate stack-ups, metal biasing effects, per-selected settings for optimum simulation, and more. A generic PDK is presented in a .STF file, and a use case is described which can simultaneously save engineering time and eliminate potential mistakes.
The increasing complexity of integrated designs has pushed the limits of computing capabilities beyond a single CPU process. The ability to distribute circuit simulations to multiple processors on a single computer and utilizing external remote compute farms can dramatically reduce the overall simulation time for resource-intensive problems as well as optimization routines requiring hundreds if not thousands of iterations. This MicroApp will present a new option for high-performance computing for circuit simulation using AWR software solutions. Benchmark data will be presented for various sample designs.
Simulation software Femtet solves the electromagnetic challenges in a wide range of industrial and academic fields. The leading engineers must spend more time on their problem solving, not on the time-consuming simulation setups. Femtet offers the ease of operations, but not at the expense of simulation accuracy. Femtet does not require hypercomputing system like a workstation. It simply runs on a personal computer. At the MicroApps seminar, you will witness what Femtet can do to help engineers solve the challenges of electromagnetism and optimize the design.
Power amplifiers (PA) are a critical part of RF modules. Ease of performing critical measurements in PA design greatly increases design team’s productivity. Learn how to improve your critical PA measurements and corresponding analyses using Cadence Spectre RF Option and Virtuoso ADE Assembler and Explorer. We’ll demonstrate measurements like Loadpull contours, power contours, power added efficiency, small signal S-parameters, large signal S-parameters, and large signal gain. Seamless integration between Spectre RF Option and Virtuoso ADE Explorer and Assembler makes this design flow very easy to use and efficient.
FormFactor's WinCal software is a trusted software tool for achieving the best Vector Network Analyzer calibrations possible with integrated circuit wafer probes. This presentation will leave you saying "Wow, I did not know WinCal could do that!" Features such as the math scratchpad, sequencing capability, the graphing tool, and the remote API will be explained by rich examples.
Beowulf, a new fast solver that is finishing development at Sonnet, culminates years of research into a fast and reliable electromagnetic solver for large or high-frequency problems which maintains Sonnet's high level of numerical precision. Fast results are demonstrated for huge problems, solving to full numerical precision. Applications such as large 5G antenna arrays and devices are shown and discussed.
Starting this year, the long awaited 5G service unveiled in Asia market using sub 6GHz band. Currently, 4G and 5G networks coexist to meet current and growing mobile demands. Therefore, service providers raised the need for single platform servicing LTE and 5G NR concurrently, and flexibility adapting for the evolving standard requirements. TI’s 2nd generation RF sampling RFIC integrates multiple low-power transceivers which can be flexibly configured. By taking few example applications like multi-standard platform and low-latency RF repeater, TI will demonstrate reduction in system complexity without sacrificing the required features.
4G networks integrators are demanding multiple RF tests which require large dynamic range and versatility. The continuous evolving of LTE bands are presenting a challenge to the design engineers, in terms of multiple modulation bandwidth and wide band span from 700MHz to 6000MHz. Tests such as; Carrier Aggregation, Load-Pull, Harmonics and Jammers require digitally tunable filter solutions. This presentation will put together new block diagrams based on tunable and/or fixed filters to provide large dynamic range and versatility, which will cover:
• Tunable Frequency and Band-Width for Band-Pass and Band-Reject Filters.
• Tunable frequency of Band-Pass/Band-Stop Duplexer
S-parameter models used in high-frequency/high-speed applications continue to increase in size, complexity, and port count. By definition, a tabulated S-parameter file represents an incomplete specification of a circuit element, requiring processing of missing, noisy, and non-physical data by the simulator. Robust treatment of such models is challenging, particularly in time-domain simulators, and there is no perfect one-size-fits-all solution. Learn about our automated methodology for handling S-parameter data in the nport component. We will demonstrate recent improvements and give suggestions to more accurately and quickly simulate circuits containing S-parameter data.
Precision Low Phase Noise Oven Controlled Crystal Oscillators with output frequencies from 10 to 100 MHz are the key reference sources for modern synthesizers. Phase noise, aging and frequency stability vs. temperature are the main parameters of OCXO to ensure the quality of synthesizers. But another important parameters like dynamic temperature sensitivity, vibration sensitivity (not only for moving vehicles) are being ignored mistakenly by the synthesizer’s developers. What parameters may be important for synthesizers? What are the phase noise limit for oscillators? All these topics will be covered during this workshop.
High power amplifiers do a poor job duplicating the input signal without distortions. Due to the transient response of the amplifier the output will over shoot, ring and droop, introducing undesired low and high frequency components into other parts of the spectrum. Pulse shaping, as it is done today, is an effort to fix fidelity issues caused by the transmitting amplifier and is accomplished by a combination of imperfect methods, most external to the amplifier. In this technical presentation Paulo Correa explains a new approach that matches input pulse signal shape, minimizes droop, overshoot, ringing, rise and fall times.
As digital conversion technology continues to operate at higher frequencies, the RF front end requires less components to support the digital conversions. In many cases the ADC and DAC components can directly convert at the RF frequencies. To support this growth, low loss filters at these frequencies can reduce the RF chain between the antenna and the conversion point. The parts being offered can improve system noise performance, system sensitivity and reduce parts count with associated reliability improvements and support direct conversion close to the antenna.
Testing of 5G New Radio (NR) transceivers requires a shift from traditional “conducted” measurements at the antenna port. Today’s modern beam steering antennas will drive nearly every transmitter or receiver test for these radios to be changed to an over-the-air (OTA) test. Both base stations and handsets will now utilize transceivers with an integrated antenna array system. And, while many 5GNR devices will operate in the mmWave FR2 bands, path loss is extreme and beam widths are very narrow. Panelists will discuss the nuances of 5G technology as well as share the test challenges and solutions to verify 5G performance.
Phased array antenna system have used “brick” construction methods to bring the feed network and system components into the pitch of the array, for decades. With the imminent deployment of 5G phased array systems at millimeter wave frequencies, designers will migrate to the highly integrated and cost effective “panel” form. System performance while maintaining regulatory compliance will be a challenging design space. This presentation will offer a panelized array of filters which can be incorporated within the antenna array pitch and bonded to the beamforming system in panel form, enabling RF filtering.
As signal bandwidths and constellation densities of wireless standards increase, it has become increasingly important when testing an RF component to ensure that the RF performance of the test equipment used does not cause EVM measurements to be inaccurately high or low. This session will present mathematical models to quantify how the noise and distortion of the signal analyzer and signal generator affects the final EVM result. The focus will be on OFDM based standards such as WLAN-6 (802.11ax) and 5G NR.
5G devices need on-wafer source and load-pull, which can be a challenging.
Low-loss is critical to maximize the tuneable range of impedance, as is reliable pad contact during tuning.
Access to probes and tuners must be ergonomic for setup purposes as well as high power optics to deliver accurate probe placement.This is especially so if you need to evaluate harmonic tuning up to 120 GHz and over multiple temperatures.
We will discuss these problems, solved by our innovative new solution capable of tuning on both ports to 120 GHz over a broad temperature range of -40 to 125 DegC.
DLI offers an entire passive RF product line that utilizes thin film microstrip technology. This technology inherently is susceptible to unwanted crosstalk and radiation. The design and integration of DLI’s components with a PCB is critical for the success of the desired performance. This presentation will provide recommendations on mounting, channelization, and layout of devices on PCBs. Also discussed will be on chip design methods utilized by DLI to reduce the impacts of cross-talk and radiation.
Advanced rigid epoxy-based laminates with low loss dielectric properties are proven to be reliable, lower cost alternatives to ceramic materials for applications up to 60 GHz. Low CTE minimizes stress induced to attached die over thermal cycles, resulting in high yielding assembly and high reliability chip packaging for harsh environments. Build-up construction with laser drilled, copper filled microvias, along with significantly thinner core/pre preg layers, enable high density designs up to ~50% thinner compared to standard technologies. These organic substrates can be produced with high planarity for IC placement, impedance control and compliant with EN9100 for space applications.
The RF performance of PCB based filters is influenced by material properties and PCB fabrication processing. Depending on the filter design and construction, some of these filters have RF performance which is more sensitive to material property differences and PCB fabrication processing variation.
This presentation will show how normal variation of certain material properties can have an effect on RF performance of different types of PCB based filters. The same analogy will be done with PCB fabrication processing variables showing how they can impact the RF performance of a PCB based filter.
Introduction of JQL's 28G/38Ghz smt microchip device solution for 5G MIMO Antenna. New solution covers K, Ku and KA bands with robust RF performance in surface mount package. For sub 6Ghz, JQL introduced 7mm surface mount circulators/isolators covering 3.5Ghz and 4.9Ghz, in addition to the current 10mm 5G product line. We want to take this opportunity to introduce our latest product offering and get some feedback from design engineers.
Phased arrays, which provide spatial power combining and beam-steering, have become the foundation for 5G mmWave deployments. In this talk, Mixcomm and Global Foundries will address the design of integrated RF SOI based mm-wave beamformers focusing on (a) impact of RF Technology choice on array module architecture, and (b) design of efficient and reliable mm-wave transmit beamformers in RF SOI. Technology choice and IC architecture/design will be presented in the context of thermal power budgets, short and long term reliability, IC packaging with antennas, and overall module cost to enable scalable, robust mm-wave arrays for dense 5G mm-wave infrastructure rollouts.
In modern phased array systems hundreds of RF transceiver channels are used to round out systems’ performance and capabilities. Building such systems using discrete RF DACs and ADCs would be power and area intensive. However, you are in luck! Texas Instruments has developed a new low power, quad-channel RF Transceiver with four direct up/down conversion transmitter and receiver chains and two wideband RF sampling auxiliary chains that operate from RF 600MHz to 6GHz in a 17x17mm, BGA package. In this presentation, the AFE77xx illustrates the performance in 100MHz bandwidth mode at just 5W of consumption with all 4T4R channels active.
Current technological trends including 5G development create a strong need for board-level passive components at frequencies of Ka-band and above. To properly support introduction of these products at frequencies of interest, all aspects of component design and development must be considered including high frequency fixture design, installation techniques and test procedures. This forum is going to present best installation practices and test methods that would maximize performance of board-level passive chips at frequencies of Ka-Band and above.
SAGE Millimeter offers two standard dual-polarized antenna families, namely, quad-ridge based and orthomode transducer (OMT) based. The quad-ridge based antennas cover broader operating bandwidth, often multi-octave, such as 4 to 24 GHz but are limited to the lower millimeter-wave frequency due to stringent machining and assembly boundaries. The OMT based antennas draw more application attention. Various antenna types such as the conical horn, lens corrected, and scalar horn, can be used to suit any system application. Many dual-polarized antennas geared towards 5G technology have been developed by SAGE Millimeter.
Highly integrated RF frontends are key components for K/Ka-band satellite communication and for 5G. Designing such complex modules is a real challenge. An ideal solution for this is EMPIRE XPU: a full wave 3D EM-field solver based on FDTD. The IMST invented XPU technology allows to simulate larger and more complex designs compared to competition. This will be shown at the design of a highly integrated frontend module based on PCB technology.
Beamforming using phased array antennas is a common technology in the aerospace & defense industry for radar and electronic warfare. In satellite communications and 5G NR, beamforming with phased array is becoming the default concept. This requires cost efficient commercial of the shelf beamforming solutions. Integrated beamformer ICs shrink the size of antenna feed electronics. Multiport network analyzers shrink necessary test setups down to one instrument.
To be competitive in 5G, Satcom, and defense electronics, new systems must be brought to market faster and more efficiently while maximizing first pass design success. While simulation has transformed the early stages of the design process, little has changed over the last 6 decades in the physical process of characterizing components, prototyping systems, and integrating designs for production. In this session we dive into specific examples where design reuse with plug and play modular building blocks is enabling seamlessly design, prototype, and production of RF and Microwave systems for land, sea, air, and space based applications.
The Xilinx RFSoC provides 100 Gigabit Ethernet optical ports for streaming data from its high speed A/D converters. 100 Gigabit Ethernet is capable of streaming data at rates as high as 12.5 Gigabytes per second. In order to capture data at these very high rates, real-time recording systems require a major upgrade in their storage technology. NVME provides a new storage protocol and interface to accommodate exponentially higher streaming data rates than previous generation interfaces.
This presentation will familiarize System Design Engineers with PC based real-time recording systems and the latest techniques for creating an NVME PCIe type recording system.
Characterization of Wi-Fi chipsets involves significant challenges. With channel bandwidths up to 160 MHz and MIMO architectures, the demands on test equipment are substantial. Compromises are often required involving measuring RF power per channel and time alignment between channels. Learn how to unveil the true performance of your Wi-Fi chipset.
Most noise sources in the market are powered by 28V without data transfer capability. This presentation introduce Keysight latest USB noise source that provides ease of use in powering up the noise source and facilitating data transfer. The main issue via the USB approach is the high ENR uncertainties due to unwanted heat dissipation from switching regulators, which eventually degrades the accuracy of the actual DUT noise figure measurement.This presentation will discuss methods to reduce heat dissipation and the novel technique implemented to minimize the temperature delta caused by the voltage switching regulator.
Modern communication and radar systems occupy very wide bandwidth, either by using very a short pulses, wideband modulation or other techniques. Besides the measurement of the modulation characteristics, the verification of emissions according to EN or FCC standards is mandatory. Many of these UWB transmitters operate between 3 and 81 GHz, and regulations require 50 MHz resolution bandwidth for measuring peak transmission power. In this paper we will review the basics of wideband emission measurements with spectrum analyzers using wide bandwidth RBW filters.
Engineers working on the characterization and validation test of 5G mmWave beamformers need a test system designed for semiconductor devices with multiple input and output ports (horizontal and vertical polarization and 4, 8, and even 16 channels).
This sessions presents a test approach that simplifies connections to the device under test, and gives users the ability to speed up measuring the TX and RX performance of every signal path, both with CW signals and with high-bandwidth 5G New Radio waveforms.
Practical high-speed RF data conversion with multi-GSample/s ADCs and DACs has afforded attractive new options for RF transceiver architectures, promising reduced hardware complexity and increased frequency agility in analog front-ends for SDRs, multi-standard base stations and even mobile devices, as well as RF test equipment and instrumentation. This MicroApp discusses system-level advantages, limitations and trade-offs of direct RF conversion architectures with current generation conversion components.
Emerging technologies like 5G operate anywhere from 20GHz-to-90 GHz. Delivering high volume, low cost devices at these frequencies is challenging, and so is testing. This paper presents a new approach to RF-Measurements that will simplify testing at these frequencies while still enabling complex features like Beam-Forming transmitters to be tested.
At these frequencies, just connecting to a device at these microwave frequencies is expensive, complex and time consuming. This paper presents a new approach to RF-Measurements that will simplify testing at these frequencies while still enabling complex features like Beam-Forming transmitters to be tested
This presentation addresses FCC Part 30 and radiated tests required on 5G mmWave devices. Device positioning that meets the measurement sample grid spacing prescribed in FCC Part 30 measurements requires special consideration and advance planning. The lack of antenna ports also drives many tests that could previously be performed in a conducted environment (i.e. cabled) to be measured over-the-air. The narrow beam width and directionality of mmWave signals complicate signal capture and maximization. A positioning system applicable to radiated test chambers and specially designed for mmWave measurements is presented as a solution for FCC Part 30 and other radiated tests.
5G and automotive radar are using frequencies in the millimeter wave range (E-band) and applications in the A&D sector cover frequencies up to the THz range.
In addition to S-Parameter measurements also frequency converting measurements, e.g. on downconverters, are gaining importance and, at the same time, are a challenge when using frequency extenders with a Vector Network Analyzer.
This presentation will give an insight into setting up and performing frequency converting measurements with frequency extenders and show typical measurement results.
Thermoreflectance-based thermal imaging has been established as an effective technique for thermal analysis of GaN HEMTs and other high performance microwave devices. Further advances in this technique meet the increased thermal challenges with these devices with respect to thermal sensitivity and transient performance. Illumination wavelengths in the visible and near-IR range provide sub-micron spatial resolution with 50 ns transient response for top-side or back-side thermal imaging. Accurate calibration ensures a temperature resolution to 0.10 degrees C. These advances further enhance the utility of thermoreflectance-based thermal imaging to ensure long term reliability of advanced high power microwave devices.
Real Time S-Parameter Uncertainty Calculations are now available on Commercial Vector Network Analyzers (VNAs). This presentation will review the requirements for making SI traceable S-Parameter measurement including correlated measurement uncertainties using commercial off the shelf solutions.
At the conclusion of this presentation, the participant will have a working understanding of the National Metrology Institute’s (NMI) primary experiment; the importance of propagating correlated uncertainties through the traceability chain; the required components to perform an SI traceable calibration and verification on the end user’s VNA; along with the ability to state the measurement uncertainty for each S-Parameter measurement.
Automotive FMCW radars operate typically between 76 and 77 GHz. The frequency range between 77 and 81 GHz has become available in some countries for automotive radar applications. The distance resolution of a FMCW radar is proportional to its signal bandwidth. This paper will review different methods to overcome the challenges of RF measurements in the E band for ultra-wide signals up to 8 GHz. It will then show the demodulation and analysis of a wideband automotive radar signal and discuss the results and main performance parameters.
As converter analog input bandwidths begin to touch 10 and 20GHz ranges this leaves the conventional RF designer to re-think frontend interfaces altogether. A brief synopsis of converter bandwidth measurement techniques will be described as well as a technique in measuring converter input impedances. Even if the hardware required is capital budget prohibitive; the descriptive techniques involved, give the designer some insight on how these methods are employed and therefore useful during simulation development.
Engineers always have the goal to make things smaller, lower power, and higher performance. They also tend to be lacking in time and resources. The engineering team at Richardson RFPD has teamed with Analog Devices to introduce a new highly integrated transceiver and have built a RFFE to interface with it. Our goal is to provide engineers with a small, low power, high performance starting point for their own design to reduce their design time and the amount of resources they need to do the design. This presentation will give details regarding the transceiver and RFFE
S-parameters files of passive components are typically available from vendors to be used during circuit/system design. However, the S-parameters model is obtained from vendor’s specific layouts and test boards. When the component is mounted on customers PCB the performance deviates from the typical one, normally due to changes in the layout/stackup and proximity with other components. Extensive EM-Circuital co-simulations are then needed when a more accurate prediction is crucial. This MicroApp discusses recommended techniques for predicting and optimizing the performance of TTM Technologies passives on custom PCB by using circuital and EM simulations with both S-parameters and proprietary 3D-EM models.
Translation loop PLLs are desired in agile RF systems that require lower jitter than the common PLL feedback divider architecture is able to achieve. Translation loop PLLs achieve around 10fs-rms jitter by replacing the PLLs feedback divider with a mixer and a high quality source. Maintaining spurious free dynamic range is also very important and it is highly possible that some spurious signals are generated in such complex sub-systems. This presentation will focus on the practical techniques to eliminate these spurious signals in translation loop PLL. Additionally a few other tricks to increase the performance will be explained.
Increasing space constraints have resulted in the emergence of multi-signal connectors to replace traditional sub-miniature RF connectors, esp. in smartphones and tablets. The use of DC, RF and high-speed lines in one connector rather than using several connections creates new challenges in test probe design. Ideally such test probes would be able to perform data rate checks, eye pattern measurements, and antenna power level measurements. Initial designs have been developed. This presentation aims to teach production-test and design engineers how to design their PCB assemblies in order to test their boards effectively (RF/High-Speed FCT with probing on such board-to-board connectors).
VNAs have traditionally been single chassis instruments with embedded measurement ports. This seminar will review some application examples where modular VNA architectures provide clear advantages over single chassis systems.