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[天线]Wideband Circularly-Polarized Patch Antenna

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0楼发表于: 2009-04-10 19:42:29

[table=100%][tr][td]Wideband Circularly-Polarized Patch Antenna 9qcA+gz:|
Bian, L. Yong-Xin Guo Ong, L.C. Xiang-Quan Shi uzgQ_
Inst. for Infocomin Res., Singapore %TUvH>;0
This paper appears in: Antennas and Propagation, IEEE Transactions on ExKjH*gn
Publication Date: Sept. 2006 t'{IE!_
Volume: 54 , Issue: 9 (Xv'Te?
On page(s): 2682 - 2686 RF$2p4=[
Number of Pages: 2682 - 2686 mMSQW6~j
Location: St. Petersburg, Russia .,+TpPkc
ISSN: 0018-926X +p"}F PIK
INSPEC Accession Number:9091678 tkjQSz
Digital Object Identifier: 10.1109/TAP.2006.880782 X" m0||
Current Version Published: 2006-09-06 Md[M}d8
[/td][/tr][tr][td][/td][/tr][tr][td][/td][/tr][tr][td][/td][/tr][tr][td]Abstract -{O>'9'1A
A novel wideband circularly-polarized patch antenna is presented. First, a new broadband 90deg hybrid feed network is proposed to have a bandwidth of 75% for the 10-dB return loss, good two output ports amplitude balance and a consistent 90deg (plusmn3deg) phase difference between two output ports. Then, a circular patch antenna fed by four sequential-rotation proximity-coupled L-probes orientated to have phase of 0deg, 90deg, 180deg and 270deg is presented. The four L-probes are connected to the respective ports of a feed network comprising a pair of the proposed broadband 90deg hybrid. It is found that the antenna can deliver a measured impedance bandwidth of 79.4% from 1.04 to 2.41 GHz for SWR<2, measured 2-dB and 3-dB axial-ratio bandwidths of 57% from 1.3 to 2.35 GHz and 82% from 1 to 2.4 GHz, respectively, and a measured gain bandwidth of 56.1% from 1.26 to 2.32 GHz for gain>3 dBi. The simulated im .. 6)j4-
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