关键词: 微带天线, 八木天线, 耦合场, 寄生贴片, 端射天线阵

Abstract: The frequency response and radiation characteristics of a microstrip Yagi Array antenna were studied.The phase and amplitude of the coupled field on parasitic patches were observed with the EM software HFSS and their variation characteristics with respect to the patch sizes and gaps between the patches were investigated.The study revealed the nature of the variation of the frequency response and radiation pattern with the antenna parameters.Based on the study,a design methodology of the microstrip Yagi array antenna was given.An antenna was designed and optimized using the proposed design methodology to satisfy the desired gain and radiation pattern. The test results of the fabricated antenna are consistent with the simulation,which prove the validity of the proposed design methodology.

Key words: Microstrip antenna, Yagi antenna, Coupled field, Parasitic patch, Endfire array, Satellite antenna