一种三指形馈电的多层微带阵列天线

A Stacked Microstrip Array Antenna Feed with Three Fingers Form

采用三指形微带馈电方式,设计了一种新型用于实际生产的高增益宽带小型化多层微带阵列天线,而阵列天线总厚度仅为2.5mm。该多层介质结构天线抑制了馈电网络电磁辐射,易于加工生产,增加了结构强度。测试结果表明,该阵列天线增益达到17.3d B,VSWR≤2的相对阻抗达到14%,具有良好的辐射和阻抗匹配特性,对设计宽带相控阵天线很有帮助。

In this paper, by using three fingers feeding form, a new stacked broadband microstrip array antenna with high gain and compact size is designed, which has been applied in practical production while the total thickness of the anten- na is 2.5mm only. Its muhilayer dielectric structure suppressed the radiation of feed network and increased the structural strength. The test results demonstrated that array antenna gain is about 17.3dB and the relative impedance bandwidth （VSWR≤2） approaches 14%. The antenna has been found good radiation and impedance matching characteristics as well as low profile, which is very useful to wideband phased array antenna design.