A Compact Rectangular Microstrip Patch Antenna for 2.4 GHz ISM Band Applications

This article investigates the performance of a compact rectangular microstrip patch antenna of dimension 50×50×1.6 mm
³
that works in the 2.4 GHz ISM band. The performance of the simply designed antenna with 50Ω input impedance match by inserting transition in the feed line is compared for two different substrate materials such as FR4 epoxy and Arlon. The antenna designed on FR-4 provides -10 dB impedance band of 2.38 to 2.47 GHz with maximum gain value of 1.75 dBi and poor radiation efficiency of less than 40% whereas the same antenna developed on Arlon substrate can provide improved gain of 4.1 dBi and radiation efficiency of 65% in the -10 dB impedance band from 2.4 to 2.49 GHz. The characteristic of the proposed antenna is also compared with the compatible antennas available in recent literatures.