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In order to modulate the phase of RF signal continuously, a new miniaturized Ka-band analog electrically controlled phase shifter is presented. The phase shifter based on 90°directional coupler and parallel variable capacitance diodes(VCD) achieves matching circuit and shift phase, the circuit can gain wide range phase shift by changing the bias voltage of variable capacitance diodes (VCD), and the insertion loss fluctuations of the phase shifter has a significant improvement by parallel compensation resistance. Simulation and experimental results show that the phase shifter in 29 ~ 31 GHz range obtains 180° phase shift, the insertion loss is better than 6.5 dB, and the insertion loss fluctuations are within 1 dB. [ABSTRACT FROM AUTHOR]