A Wideband Omnidirectional Circularly Polarized Spiral Antenna．Proceedings of the 2016 European Conference on Antennas and Propagation
A Wideband Omnidirectional Circularly Polarized Spiral Antenna．Proceedings of the 2016 European Conference on Antennas and Propagation
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宽带全向圆极化螺旋天线。
DOI：
10.1109/eucap.2016.7481871
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Mayumi Matsunaga
中科院分区：
文献类型：
--
作者：
Ryo Hamamoto;Chisa Takano;Hiroyasu Obata;Masaki Aida;and Kenji Ishida;Mayumi Matsunaga
提出了一种新型宽带全向圆极化天线。该天线由螺旋辐射体和偶极子馈线组成。将螺旋辐射体配置成十字形不仅可以实现全向辐射，还可以实现圆极化。将螺旋辐射体与偶极子馈线相结合，在保持良好S11特性的情况下实现宽带CP辐射。给出了天线的结构和仿真特性。仿真结果表明，该天线在轴向的-8 dB阻抗带宽为12.5%，4 dB轴比（AR）带宽为20%。在3.66 GHz时，最大增益为4.4 dBi， 4db AR波束宽度为120°。
A novel wideband omnidirectional circularly polarized (CP) antenna is presented. The antenna is constituted by spiral radiators and a dipole feeder. To configure the spiral radiators in cross shape leads not only omnidirectional radiations but also circularly polarization. Combining the spiral radiators with a dipole feeder, the presented antenna achieves wideband CP radiations as keeping good S11 characteristics. The configuration and simulated characteristics of the antenna are presented. Simulation results show that the antenna achieve a -8 dB impedance bandwidth of 12.5% and a 4 dB axial ratio (AR) bandwidth of 20% in the boresight direction. At 3.66 GHz, the maximum gain is 4.4 dBi and the 4 dB AR beam-width is 120°.