New compact UWB microstrip-fed printed planar antenna for wireless applications

Abstract

A proposed circular patch antenna with notch-cut fed by a simple microstrip line is described in this paper. It is designed for ultra-wideband (UWB) wireless communications and applications over the band 3.1–10.6 GHz. This antenna consists of a circular patch with notch-cut fed by a microstrip line, one transition step, and a partial ground plane. The 2:1 voltage standing wave ratio (VSWR) bandwidth (S₁₁<-10 dB) of the proposed antenna covers the entire UWB application range specified by Federal Communications Commission (FCC) that is from 3.1 to 10.6 GHz. The proposed antenna is able to achieve an impedance bandwidth about 8.6 GHz (2.4–11GHz). The return loss, VSWR, radiation pattern, radiation efficiency, gain, group delay, and current distribution of the proposed antenna are included in this paper. The simulation results and proposed antenna design details are presented by CST Microwave Studio.

Keywords

ultra-wideband antennas / patch antenna / current distribution / microstrip feed line / group delay

References

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