西安电子科技大学学报（自然科学版）2017，Vol.44Issue(6)：53-58,6.DOI:10.3969/j.issn.1001-2400.2017.06.010
单馈点低剖面双频带圆极化天线
Single-fed low-profile dual-band circularly polarized antenna
杨牡丹 1张福顺 1张凡 1王丹阳1
作者信息
- 1. 西安电子科技大学 天线与微波技术重点实验室,陕西 西安 710071
- 折叠
摘要
Abstract
In order to reduce the profile of the multi-layer structure and the complexity of the power dividing network of the dual-frequency dual-fed circular polarized (CP) antenna,a dual-band circularly polarized microstrip antenna is designed with a single-fed single-layer structure.It has two types of pattern of omnidirectional circular polarization and broadside circular polarization in two operating bands. A combination of an Alford loop and a shorting metallic cylinder loaded in the center of the patch is uesd to excite omnidirectional circular polarization in the low operating band;and a circular patch with a pair of symmetric rectangular slots is adopted to obtain circular polarization in the high operating band.The antenna prototype is fabricated and measured. Measured results show that the designed antenna has impedance bandwidths of 7.5% (2.42~2.61 GHz)and 10.3% (3.32~3.68 GHz)(reflection coefficient<-10 dB).Axial ratio (AR) bandwidths are 4% (2.44~2.54 GHz) and 2.3% (3.46 ~3.54 GHz)(AR<3 dB),respectively.The gain variations within two operating bands are less than 0.4 dB.This antenna can be applied to the 2.5/3.5 GHz frequency band of Worldwide Interoperability for the Microwave Access (WiMAX) system.关键词
单馈点/低剖面/双频带/圆极化Key words
single-fed/low-profile/dual-band/circular polarization分类
信息技术与安全科学引用本文复制引用
杨牡丹,张福顺,张凡,王丹阳..单馈点低剖面双频带圆极化天线[J].西安电子科技大学学报（自然科学版）,2017,44(6):53-58,6.
