Symmetrical Slot Loaded Dual Band Elliptical Microstrip Patch Antenna

In this paper, a concept of mode modification to obtain dual band performance in elliptical microstrip patch antenna has been proposed. Previously, mode modification in rectangular microstrip patch antenna was performed by using symmetrical rectangular slots closed to radiating edges. Symmetrical slots were introduced in rectangular microstrip patch antenna to lower the resonant frequency of TM030 mode to act like TM010 to mode and thus dual band antennas were successfully modeled. But implementing this concept in elliptical microstrip patch antenna to obtain dual band performance is a novel idea. The original TM010 to mode and the modified TM030 mode constitute the dual band and two modes show almost similar radiating properties, with high directivity and gain. The potential application of symmetrical slots in elliptical microstrip patch may help the researchers to obtain dual band antennas for elliptical patches. It also leads the way to design multiband antennas using appropriate metamaterials (ENG or MNG) and using the idea of additional modified modes in elliptical patches also.