A novel compact slot antenna for broadband circularly polarized radiation

Author

Chen, Yue-Ying ; Jiao, Yong-Chang ; Zhao, Gang ; Zhang, Wei ; Xie, Huan-Huan

Author_Institution

Nat. Key Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´´an, China

fYear

2010

fDate

Nov. 29 2010-Dec. 2 2010

Firstpage

201

Lastpage

204

Abstract

A novel design of broadband circularly polarized slot antenna fed by a coplanar waveguide (CPW) is proposed and fabricated. The proposed antenna has a compact size of 0.328λ×0.328λ×0.004λ. Circularly polarization is achieved by the slots around two opposite corners of the square slot. A circular tuning stub protruded into the slot from the narrowed strip at the end of the signal strip of the CPW is used to obtain good impedance matching. For the optimized antenna prototype, the obtained results show that the frequency of minimum axial-ratio (AR) and the 3dB AR bandwidth are 1.64GHz and 14.6% (1.54GHz-1.78GHz), respectively. And the VSWR(<;2) impedance bandwidth is larger than 57.9%.

Keywords

antenna feeds; broadband antennas; coplanar waveguides; electromagnetic wave polarisation; impedance matching; slot antennas; axial-ratio; broadband circularly polarized slot antenna fed; circular tuning stub; coplanar waveguide; frequency 1.64 GHz; gain 3 dB; impedance matching; optimized antenna prototype;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas Propagation and EM Theory (ISAPE), 2010 9th International Symposium on

Conference_Location

Guangzhou

Print_ISBN

978-1-4244-6906-2

Type

conf

DOI

10.1109/ISAPE.2010.5696432

Filename

5696432