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Ka波段亚谐波镜像抑制混频器的无源电路包括3d B同相功分器、Lange电桥和中频正交合成器。运用电磁仿真软件辅助设计,最终得到3d B同相功分器在15~20GHz插损小于3.1d B,幅度不平衡度小于0.02d B;Lange电桥在30~40GHz插损小于3.3d B,幅度不平衡度小于0.4d B,相位不平衡度小于0.5?;中频正交合成器在200MHz处,幅度不平衡度小于0.01d B,相位差89.3?。
The passive circuit of the Ka-band sub-harmonic image rejection mixer includes a 3dB in-phase power divider, a Lange bridge, and an IF quadrature synthesizer. Using electromagnetic simulation software to assist the design, the final gain of 3dB in-phase power divider insertion loss less than 3.1d B at 15 ~ 20GHz, amplitude unbalance less than 0.02dB; Lange bridge at 30 ~ 40GHz insertion loss less than 3.3d B, amplitude The unbalance degree is less than 0.4d B, and the phase unbalance degree is less than 0.5. The IF unbalance degree is less than 0.01d B and the phase difference is 89.3? At 200MHz.