Abstract
In this article electrically small, dual band, triple frequency X shaped patch antenna on a substrate of ceramic-PTFE composites is presented. The proposed X shape patch antenna with five rectangular slots produces dual band operation for Ku band applications and one for K band applications. In order to achieve multiband operation in conventional rectangular slot, it is introduced three equilateral triangle slots in left, right and upper edge respectively, and two small triangular slots are protruding both sides of the feed line. The simulated -10dB return loss bandwidths were 528 MHz, 576 MHz and 804 MHz at 15.33 GHz, 17.6 GHz and 18.90 MHz center frequency. The corresponding symmetric and almost steady radiation patterns have peak gains of 4.80 dBi, 6.42 dBi and 3.91dBi making the proposed antenna suitable for K and Ku band satellite applications. The radiation pattern, antenna efficiency input impedance was also analyzed. (C) 2013 The Authors. Published by Elsevier Ltd.