CPW‐fed C‐shaped slot antenna for broadband circularly polarized radiation. Issue 9 (15th April 2015)

• Record Type: Journal Article
• Authors: Ding, Kang; Gao, Cheng; Yu, Tong‐bin; Qu, De‐xin
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 25:Issue 9(2015)
• Page Start: 739
• Page End: 746
• Publication Date: 2015-04-15
• Subjects: Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.20909
• Languages: English
• ISSNs: 1096-4290

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>A novel broadband circularly polarized (CP) C‐shaped slot antenna fed by a coplanar waveguide is presented. The broadband CP operation can be achieved simply using a C‐shaped slot in the ground to produce orthogonal surface currents for left‐hand circular polarization. Using the semicircle‐shaped radiator patch, wide impedance bandwidth and broad axial‐ratio (AR) bandwidth can be obtained simultaneously. The measured results show that the proposed antenna can provide a 10‐dB impedance bandwidth of 105% from 2.78 to 8.92 GHz, and a 3‐dB AR bandwidth of 70.4% from 2.9 to 6.05 GHz. Finally, an antenna prototype with a reflector for unidirectional pattern applications is also developed. The proposed antenna has broader impedance and CP bandwidths but with a more compact size compared with the previous designs. © 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:739–746, 2015.</p> </abstract>