Vector modulator chip, as a new type of circuit that can directly perform amplitude and phase modulation on the carrier at the same time, is a research hotspot in millimeter wave communication and radar systems. This paper first uses Agilent ADS software to simulate and design a millimeter wave vector modulator chip working in the l(a band, and successfully taps out the chip based on the advanced GaAs pHEMT process line. At the same time, a complete test system and test process for the vector modulator chip are proposed, and a chip test platform is built using four Agilent instruments. The actual measurement results show that the test system is stable and reliable, and all indicators of this chip have reached the international advanced level.
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