A circular patch antenna for radio LAN's

A TM/sub 02/-mode circular patch antenna for the application of radio LANs is reported. An experimental prototype operating at 5.2 GHz is designed and tested. The antenna pattern is omnidirectional in azimuth and has a notch in the normal direction. A 3.3% bandwidth of VSWR /spl les/2 and 4.2-dB antenna gain were measured. Experimental results agree well with theoretical predictions.