A 23‐ to 28‐GHz 5‐bit switch‐type phase shifter with 1‐bit calibration based on optimized ABCD matrix design methods for 5G MIMO system in 0.15‐μm GaAs. (24th February 2022) - Zhang, Zhiyang
Abstract: The fifth‐generation (5G) mobile communication system is being developed to provide ultra‐high‐speed and large‐capacity wireless communication services. However, due to the large transmission loss in the air for high‐frequency signals, it is necessary to use large‐scale array antennas to achieve adaptive control of antenna directivity to compensate for the loss. This paper reports a passive phase shifter operating at 23–28 GHz. The proposed 5‐bit switch‐type phase shifter with 1‐bit calibration is designed in a 0.15‐μm GaAs process. A new design method based on the optimized ABCD matrix and impedance matching techniques between a chip and a printed circuit board (PCB) is developed to obtain better radio‐frequency (RF) signal transmission. The proposed phase shifter features a good‐phase performance with a measured root‐mean‐square (RMS) phase error of less than 10° across 23–28 GHz. For all the phase shift states, the insertion loss is 18 ± 2 dB at 28 GHz and the RMS gain error is less than 2.1 dB over 23–28 GHz including pads and RF connector loss. The phase shifter consumes no DC power and occupies a chip area of 2 × 0.7 mm 2 including all the pads. Abstract : This paper reports a 23‐28 GHz 5‐bit switch‐type phase shifter with 1‐bit calibration in 0.15‐μm GaAs process. A new design method based on the optimized ABCD matrix and impedance matching techniques between a chip and a printed circuit board is developed to obtain better radio‐frequency signal transmission. The proposed phase shifter features a good phase performance with a measured root mean square phase error of less than 10° across 23‐28 GHz.