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This paper presents a new compact rectangular microstrip patch antenna with a superstrate element. This antenna operates at 2.4 GHz TM01 fundamental mode, which is suitable for WLAN applications. The patch area is reduced by 50% by placing three rectangular slots on the ground plane. In order to compensate for the decreased gain due to the size reduction, a high permittivity superstrate is used with 4mm thickness and 5mm height from the antenna surface. The proposed antenna offers the advantage of occupying half the area of the non-modified rectangular patch while it possesses the same broadside gain of 6-7dB. The trade-off is the additional antenna height due to the placement of the superstrate element.

A Novel Compact Rectangular Microstrip Patch Antenna with a Superstrate Element for 2.4GHz WLAN Applications