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设计一种新型宽频带微带天线单元。天线采用空气介质腔,通过容性馈电贴片进行同轴线馈电,并进行边缘开槽。通过采用HFSS高频系统仿真软件仿真分析发现,适当的调整天线切口、空气腔体和馈电贴片的长宽可以调整天线的带宽和驻波比性能。以反射系数S11≤-10dB为标准,可测得天线的阻抗带宽达到50%,覆盖4～6GHz,并且通过改变馈电贴片宽度或空气腔体宽度可以实现天线的双频特性。
Design a new broadband microstrip antenna unit. Antennas use air-dielectric cavities for coaxial feedthrough of capacitive feed patches and edge-grooving. Through the simulation analysis of the HFSS high-frequency system simulation software, it is found that the antenna bandwidth and VSWR performance can be adjusted by properly adjusting the antenna notch, air cavity and feed patch length and width. Taking the reflection coefficient S11≤-10dB as the standard, the impedance bandwidth of the antenna can be measured to reach 50%, covering 4 ~ 6GHz, and the antenna’s dual-frequency characteristic can be realized by changing the width of the feed patch or the air cavity.