DESIGN OF MULTIBAND MICROSTRIP PATCH ANTENNA USING SPLIT RING RESONATOR FOR APPLICATION IN C, X AND K U BAND

In this work three different microstrip antenna designs are investigated. The first design is a simple microstrip patch antenna. The second design is a multiband antenna and consists of the first structure microstrip patch antenna having a circular slot with one arm . The third design is also a multiband antenna. It is a modification of the second one and consists of a split ring resonator (SRR) load ed in the ground plane exactly behind the patch. The first structure resonates at 14 GHz. The second and third structures sh ow four frequency bands at 5.8 GHz, 11 GHz, 13.4 GHz and 15.4 GHz, but there is an improvement in gain, bandwidth, return loss and VSWR by using an SRR in the third structure.