Impedance Matching Optimization for GPS Frequency Band based on CSRR Load Technique Neighboring Triangular Slot Antenna

Impedance matching optimization based on the CSRR load technique neighboring a triangular slot is present. This antenna comprises an asymmetrical triangular slot fed by a coplanar waveguide (CPW) with stair-step impedance and a complementary split-ring resonator (CSRR). The CSRR is applied to control the operating frequency of 1.575 GHz, while the triangular slot will control the frequency of 2.45 GHz and 5.5 GHz. In the simulation, the antenna can support the operating frequency of 1.575 GHz, 2.45 GHz, and 5.5 GHz for GPS and WLAN IEEE802.11 a/b/g application. Moreover, the antenna size is compact with a dimension of 51.3 mm x 44 mm. The 2-D radiation pattern is omnidirectional at the operating frequency of 1.575 GHz and 2.45 GHz and directional at the operating frequency of 5.5 GHz. However, the peak gain of the antenna is approximate 2 dBi.