DESIGN OF MULTIBAND MICROSTRIP ANTENNA USING RECTANGULAR SLOT

In wireless communication systems, the antenna is a critical component. A well-designed antenna efficiently reduces system requirements while increasing overall system performance. Many telecommunication providers need many frequencies to satisfy their needs. Hence a multiband antenna is preferred over a single-frequency antenna. Therefore, in this research antenna with multi band is chosen. In order to maintain the low cost, designated microstrip antenna with miniaturized design 30.23x21.81 mm2 (W x L) which used FR-4 as a substrate is selected with the dielectric constant, ɛr = 4.3 mm and 1.6 mm of substrate thickness. The multi band antenna was designed and simulated by implementing three rectangular slots on the microstrip patch using CST software. The optimal parameters for this multi band antenna design were W1 = 3 mm, L1 = 8 mm, W2 = 3 mm, L2 = 8 mm, W3 = 3 mm, and L3 = 7 mm after optimisation using parameter sweep. By using rectangular slots on the microstrip patch, multi band operations were achieved at 2.56 GHz, 4.42 GHz and 5.82 GHz with a return loss of -17.91 dB, -23.18 dB and - 51.04 dB, respectively