Design of Broad Band Microstrip Antenna at S Band
Abstract: A broad band microstrip antenna is designed at S band in this paper. The antenna is composed of a differential-fed microstrip patch and a broad band 180˚-phase-shift power divider. The 180˚- phase-shift power divider converts the single feeding port to the differential feeding ports. Then, the bandwidth is broadened by adding air layer and cutting double cross slots on the patch. Due to the differential-feeding structure, the proposed antenna has not only the broad band characteristic, but also desirable good radiation performance during the bandwidth such as low cross-pola- rization, symmetric patterns and stable gain. The size of the designed antenna rectangular patch is 45.5 mm × 35.4 mm (W × L). The antenna height is 13.5 mm. The measured results show that an impedance bandwidth from 2.5 to 3.5 GHz, i.e., 33.3%, is achieved. The pattern is quite stable dur-ing the bandwidth. The cross-polarization is under −20 dB.
文章引用: 王道雨 , 汪敏 , 袁媛 , 吴文 (2015) S波段宽带微带天线设计。 天线学报， 4， 17-24. doi: 10.12677/JA.2015.43003
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