Finger-shaped antenna design for ultra-wideband applications

In recent years, the UWB technology in wireless communication systems is required for many military, civilian, and medical applications, so small and economic UWB antennas need to be produced for these purposes. Since the Federal Communications Commission (FCC) reported the UWB frequency of 7.5 GHz (from 3.1 GHz to 10.6 GHz) was licensed for high data rate wireless technology and antenna plays a very role in UWB systems. The design, simulation, and fabrication of finger-shaped antenna are presented in this paper. The designed antenna has a reflection coefficient (S₁₁) less than -10 dB and voltage standing wave ratio (VSWR) less than 2 for the frequency of 4 to 12 GHz. The far field radiation patterns are introduced with the proposed antenna dimensions and feeding by microstrip transmission line feeder. Simulation and fabrication results for S₁₁ VSWR, radiation patterns, and gain of the proposed antenna are presented and discussed along the frequency band 4 to 12 GHz.