Novel FET integrated inverted stripline patch

An FET has been integrated with a cavity-enclosed inverted stripline patch antenna. This low-cost microwave source operates at 5.69 GHz with an output power of 57 nW. The half-power beamwidths in the E- and H-plane patterns are 46 and 64 degrees , respectively. The crosspolarisation level is nearly 20 dB down from the maximum. >