Miniaturized dual-band slot antenna design for GPS, amateur radio and WLAN applications

In this article, miniaturization of dual-band slot antenna design for GPS, WLAN and amateur radio applications is presented. The proposed dual-band miniaturized antenna is achieved using slits, rectangular split ring and metallic strips fed by 50 omega microstrip feed. The first resonant frequency is achieved by loading reference antenna with eight slits that is antenna 1 and the second resonant frequency is achieved by loading with one center slits and rectangular split ring that is antenna 2. Dual-band antenna is achieved by loading reference slot antenna with nine slits and rectangular split ring which resonates at frequency of 1.52 and 3.03 GHz respectively. As a result, it is achieved 53.79% reduction in first band resonant frequency with 76.07% improvement in -10 dB bandwidth and 7.90% reduction in second band resonant frequency compared to reference slot antenna. Further, this dual-band antenna is miniaturized by metallic strips which are placed on the bottom of the substrate. This results in 61.39% reduction in first band resonant frequency with 32.07% improvement in -10 dB bandwidth and 26.13% reduction in second band resonant frequency in comparison with reference slot antenna topology.