A Loss-Compensated 5-Bit Ka-Band Digital Phase Shifter With Low Rms Phase/Gain Error Over Wide Temperature Ranges

This paper presents the design and demonstration of a 5-bit Ka-band phase shifter with amplifiers to compensate for the passive loss using a 0.13-mu m SiGe BiCMOS technology. Adopting the switched low-pass (LP)/high-pass (HP) networks in the phase shift stages, the phase shifter exhibits measured RMS phase and gain errors less than 4 degrees and 0.6 dB, respectively, within the frequency range of 30-40 GHz under different temperature conditions (from -40 degrees C to 140 degrees C). To the authors' knowledge, our proposed phase shifter achieves the best RMS phase/gain error performance at Ka-band among the published works.