A K-Band Low-Complexity Modular Scalable Wide-Scan Phased Array
A new circuit architecture for a modular scalable integrated phased array transmitter is presented. In this architecture, the number of phase shifters and their associated control signals are reduced by a factor of two compared to conventional phased arrays. The proposed configuration significantly reduces the phased arrays’ control complexity. It can also reduce the power consumption and chip area if designed for limited-scan applications. A symmetric eight-element phased array module is designed based on the proposed configuration at K-band using 130-nm CMOS process for wide-scan applications. The eight-element phased array provides ±90° of scan range with measured sidelobe levels smaller than -8 dB within the frequency range of 23.2‒24.4 GHz. The phased array consumes 682 mW of power and occupies 6.64 mm2 of die area. A number of these modules can be connected to form a larger array with a narrower beamwidth.