Metamaterial Inspired Dual Band Patch Antenna Array

Abstract

This paper presents a shorted-pin, dual-band, metamaterial-loaded microstrip patch antenna array. Under the unloaded conditions, the traditional patch antenna array resonates at 5.8 GHz with gain of 9.8 dBi and bandwidth of 540 MHz. However, when each patch of this traditional array is loaded with split ring resonator (SRR) and a metallic via hole is made on the patch, the same antenna array also produces an additional resonant frequency in 2.45 GHz Wi-Fi band with bandwidth and gain of 290 MHz and 5.6 dBi, respectively, while the initial resonant frequency (i.e. 5.8 GHz) gets shifted to 5 GHz Wi-Fi band, providing the gain and bandwidth of 11.4 dBi and 510 MHz, respectively. The prototype of this proposed antenna array has been fabricated.