The dimensions of the proposed antenna are shown in Fig.l. The proposed patch antenna length L» is between Ao/3 and Ao/2 and its width W2 is smaller than Ao and the substrate thickness d is very small. To be resonant antenna, the length L should be around half of the wave length. In this case the antenna can be considered as a i/2 transmission line resonant cavity with tri shaped slots on the top face and a partial ground at the rear end. Table 1: Dimensions of printed patch antenna Figure 2: A Fabricated Antenna Figure 5: The simulated Far field radiation patterns at different frequencies (a) 3.1GHz (b) 6 GHz (c) 9 GHz (d) 10.6 GHz. Saidaiah Bandi 20438
