A Wideband Circularly Polarized Patch Antenna with Conical Radiation Pattern
作者单位：Department of Electronic EngineeringCity University of Hong Kong 83 Tat Chee AvenueKowloon Hong Kong SAR Member IEEE Department of Electronic EngineeringCity University of Hong Kong 83 Tat Chee AvenueKowloon Hong Kong SAR Fellow IEEE
会议名称：《2005年海峡两岸三地无线科技学术会》
会议日期：2005年
学科分类：080904[工学-电磁场与微波技术] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学]
关 键 词：Index Terms: Circular polarization Conical beam Patch antenna
摘 要：A circularly polarized conical-beam patch antenna that employs a hybrid feeding mechanism for wideband operation is presented in this paper. It is implemented through using a pair of L-probes and apertures, which are connected by the feeding network, to excite the circular patch in orthogonal directions. The patch is supported by two plastic posts of 0.084 λ0 height in the air, where λ0 is the free space wavelength at 2.53GHz. This antenna possesses an impedance bandwidth of 28.2% (SWR 1.5) and an axial ratio bandwidth (AR 3dB) of 28.3%. Also, it has left hand circularly polarized (LHCP) conical patterns with the peaks located at around θ=±3°over these bandwidths. Moreover, its 3-dB gain bandwidth and peak gain are 32.4% and 5.5dBi, respectively.