毫米波矢量调制器及其在有源相控阵天线中的应用

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矢量调制器芯片作为一种可以同时对载波进行相位和幅度调制的新型电路,能够替代传统的数字移相器和数字衰减器用在有源相控阵系统中.先设计了一款工作在Ka波段毫米波单片矢量调制器,在片测试结果显示可以实现-12～-40 dB的幅度调制与360°的相位调制.然后设计了一个Ka波段1×8阵有源相控阵天线,改变矢量调制器的控制电压,成功实现了波束扫描功能,验证了基于矢量调制技术的有源相控阵的可行性.

Vector modulator can be employed in active phased array antenna（APAA）as a replacement of conventional digital phase shifter and attenuator for its capability of simultaneously realizing millimeter-wave direct carrier modulation on phase and amplitude.A millimeter wave vector modulator was realized with advanced GaAs pHEMT process,and onchip measurement has shown that-12~-40 dB amplitude modulation and 360° phase modulation was achieved.A Ka band 1×8 array experimental APAA composed of vector modulators was designed and proved to steer the beam scanning effectively.It was demonstrated that APAA based on vector modulation technique is feasible.