Circularly Polarized Square Slot Antenna With a Largely Enhanced Axial-Ratio Bandwidth

被引：39

作者：

Pan, Shien-Piao ^{[1
]}

Sze, Jia-Yi ^{[2
]}

Tu, Po-Jen ^{[2
]}

机构：

[1] Natl Def Univ, Chung Cheng Inst Technol, Def Sci Sch, Tao Yuan 335, Taiwan

[2] Natl Def Univ, Chung Cheng Inst Technol, Elect & Elect Engn Dept, Tao Yuan 335, Taiwan

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2012年 / 11卷

关键词：

Axial ratio; circular polarization; slot antenna; L GROUNDED STRIPS;

D O I：

10.1109/LAWP.2012.2213568

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A new easy-to-apply design procedure is proposed in this letter for constructing small wideband circularly polarized (CP) bidirectional and unidirectional square slot antennas. With an asymmetric T-shaped strip protruded from the signal line of the feeding coplanar waveguide (CPW) into the square slot, a reference antenna with a fractional 3-dB axial-ratio bandwidth (abbreviated as CPBW) of about 11% can be obtained. The proposed bidirectional CP slot antenna (BICPSA) can be modified from the reference antenna by stretching the left end of the T-shaped strip upward, by embedding a rectangular metal patch in the square slot, and by implanting a grounded metal strip from the right edge of the slot. The resulting BICPSA has a much larger CPBW of 39.1%, which is about 3.55 times that of the reference antenna. Finally, by placing a simple reflector underneath this BICPSA without changing its structural dimensions, one can obtain unidirectional radiation patterns with a greatly increased gain of 7.6 dBic, but with only a slightly decreased CPBW of 34.3%.

引用

页码：969 / 972

页数：4

共 11 条

[1] A CPW-FED BROADBAND CIRCULARLY POLARIZED SQUARE SLOT ANTENNA [J].

Chu, Qing-Xin ;

Du, Shu .

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2010, 52 (02) :409-412

[2] Broadband CPW-Fed Circularly Polarized Square Slot Antenna With Three Inverted-L-Shape Grounded Strips [J].

Felegari, Nader ;

Nourinia, J. ;

Ghobadi, C. ;

Pourahmadazar, Javad .

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 2011, 10 :274-277

[3] CPW-FED SQUARE SLOT ANTENNA WITH LIGHTENING-SHAPED FEEDLINE FOR BROADBAND CIRCULARLY POLARIZED RADIATION [J].

Liao, W. ;

Chu, Q. -X. .

PROGRESS IN ELECTROMAGNETICS RESEARCH LETTERS, 2010, 18 :61-69

[4] Circularly-polarized wide slot antenna loaded with a parasitic patch [J].

Row, Jeen-Sheen ;

Wu, Shiao-Wen .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2008, 56 (09) :2826-2832

[5]

Samper J. M., 2009, GPS GALILEO DUAL RF

[6] Axial-ratio bandwidth enhancement of asymmetric-CPW-fed circularly-polarised square slot antenna [J].

Sze, J. Y. ;

Wang, J. -C. ;

Chang, C. -C. .

ELECTRONICS LETTERS, 2008, 44 (18) :1048-U4

[7] DESIGN OF BROADBAND CIRCULARLY POLARIZED SQUARE SLOT ANTENNA WITH A COMPACT SIZE [J].

Sze, J-Y. ;

Pan, S-P. .

PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER, 2011, 120 :513-533

[8] Circularly polarized square slot antenna with a pair of inverted-L grounded strips [J].

Sze, Jia-Yi ;

Chang, Chi-Chaan .

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 2008, 7 :149-151

[9] Axial-Ratio-Bandwidth Enhancement of a Microstrip-Line-Fed Circularly Polarized Annular-Ring Slot Antenna [J].

Sze, Jia-Yi ;

Chen, Wei-Hung .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2011, 59 (07) :2450-2456

[10] Broadband CPW-Fed Circularly Polarized Square Slot Antenna With Lightening-Shaped Feedline and Inverted-L Grounded Strips [J].

Sze, Jia-Yi ;

Hsu, Chung-I. G. ;

Chen, Zhi-Wei ;

Chang, Chi-Chaan .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2010, 58 (03) :973-977

← 1 2 →