一种5~20 GHz超宽带移相器

基于SMIC 40 nm CMOS工艺设计了一款工作频率覆盖5 ~20 GHz的超宽带6位移相器。该移相器采用矢量合成结构,核心电路包括输入巴伦、正交信号发生器、矢量合成器和数模转换电路。正交信号发生器采用三级多相滤波结构,拓展了带宽。采用低误差和电流阵列控制结构的矢量合成器,实现了高的移相精度。后仿真结果表明,该移相器输入和输出回波损耗分别小于8.85 dB和10.12 dB,RMS相位误差小于1.52°,RMS增益误差小于0.17 dB。在2.5 V电源电压下功耗为43.50 mW。芯片面积为1.06 mm×0.80 mm。

A 5-20 GHz Ultra-Wideband Phase Shifter

An ultra-wideband and high precision 6-bit phase shifter operating at 5-20 GHz was designed in SMIC 40 nm CMOS technology. The phase shifter was implemented through vector modulation and mainly consisted of input baluns, orthogonal signal generators, vector modulators, and digital to analog conversion circuits. For orthogonal signal generator, a three-stage poly-phase filter structure was designed to improve the bandwidth. A low error structure and current array control scheme were designed to reduce the phase error of the vector modulator. The post simulation results show that the input and output return loss are less than 8.85 dB and 10.12 dB respectively, the RMS phase error is less than 1.52°, and the RMS gain error is less than 0.17 dB. Under 2.5 V supply voltage, the power consumption is 43.50 mW. The chip size is 1.06 mm ×0.80 mm.