Compact Omnidirectional Antenna of Circular Polarization

A compact omnidirectional antenna of circular polarization (CP) is presented for 2.4-GHz WLAN access-point applications. The antenna consists of four bended monopoles, which are simultaneously excited through an associated feeding network. The radiated horizontal and vertical field components are de...

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Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 11; pp. 1466 - 1469
Main Authors Yu, Y., Shen, Z., He, Sailing
Format Journal Article
LanguageEnglish
Published IEEE 2012
Subjects
Antenna measurements
Bandwidth
Bended monopole
Broadband antennas
circular polarization (CP)
Electric fields
Helical antennas
omnidirectional antenna
Wireless LAN
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Summary:A compact omnidirectional antenna of circular polarization (CP) is presented for 2.4-GHz WLAN access-point applications. The antenna consists of four bended monopoles, which are simultaneously excited through an associated feeding network. The radiated horizontal and vertical field components are derived based on an analytical model, and the 90 ° phase difference between them is shown to be naturally guaranteed. With a size of 0.22λ 0 × 0.22λ 0 × 0.076λ 0 , the antenna exhibits a bandwidth (| S 11 | ≤ -10 dB and AR ≤ 3 dB) of 3.56% and a left-handed CP average gain of 1.39 dB in the azimuth plane at 2.44 GHz.
ISSN:1536-1225
1548-5757
1548-5757
DOI:10.1109/LAWP.2012.2231392