Date Added: Dec 2010
Patch antenna possesses many advantages such as low profile, light weight, small volume and compability with Microwave Integrated Circuit (MIC) and Monolithic Microwave Integrated Circuit (MMIC). However, the narrow bandwidth is the major obstacle in wide applications for the microstrip antenna. In general, the impedance bandwidth of the traditional microstrip antenna is only a few percent (2%-5%). Therefore, it becomes very important to develop broadband technique to increase the bandwidth of the microstrip antenna.