Title :
A new wide frequency band feeding technique of annular slot antenna
Author :
Minard, Philippe ; Louzir, Ali
Author_Institution :
Corporate Res., THOMSON Multimedia, Cesson Sevigne, France
Abstract :
A new wide frequency bandwidth feeding technique of the annular slot antenna (ASA) in circular polarization is reported. An experimental prototype of the antenna operating in the WLAN 5 GHz band and fed with the new feeder is designed and tested. The radiation pattern is similar to that obtained by a conventional ASA feed. Approximately 19% bandwidth of VSWR <2 and 3.5% axial ratio (AR) bandwidth at 3 dB have been measured. Experimental results agree well with theoretical predictions.
Keywords :
antenna feeds; antenna radiation patterns; broadband antennas; electromagnetic wave polarisation; loop antennas; slot antennas; wireless LAN; WLAN; annular slot antenna; circular polarization; radiation pattern; wideband feeding technique; Antenna feeds; Antenna measurements; Antenna radiation patterns; Bandwidth; Frequency; Polarization; Prototypes; Slot antennas; Testing; Wireless LAN;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2002. IEEE
Print_ISBN :
0-7803-7330-8
DOI :
10.1109/APS.2002.1016333
