Title :
A CPW-fed broadband circularly-polarized square slot antenna with E-shaped slits in ground plane
Author :
Du, Shu ; Chu, Qing-Xin
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
fDate :
Sept. 29 2009-Oct. 1 2009
Abstract :
A new broadband circularly polarized (CP) square slot antenna with coplanar waveguide (CPW) fed is proposed. E-shaped slits in opposite corners of ground plane are designed to obtain an excellent CP bandwidth. The bandwidth with an axial ratio (AR) of less than 3 dB can be tuned by varying the length of a tuning-stub which is the middle of the E-shaped slit. Measured results show that the 3 dB AR bandwidth is larger than 32.8% relative to the centre frequency of 2165 MHz and the impedance bandwidth is as large as 54.8% with VSWR ≤2.
Keywords :
coplanar waveguides; microwave antennas; slot antennas; E-shaped slits; axial ratio; broadband circularly polarized square slot antenna; coplanar waveguide fed; frequency 2165 MHz; ground plane; tuning-; Antenna measurements; Bandwidth; Broadband antennas; Coplanar waveguides; Frequency measurement; Impedance measurement; Microwave antennas; Microwave technology; Polarization; Slot antennas;
Conference_Titel :
Microwave Conference, 2009. EuMC 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4748-0
