Wideband-Notched Miniaturized Uwb Polygon-Slot Antenna Using Rectangular CSRR

Abstract

A miniaturized planar ultra-wideband (UWB) polygon-slot antenna with wideband-notched property is presented in this paper. With coplanar waveguide (CPW)-fed structure and miniaturized dimensions of 18.5 × 20.5 mm 2 , the antenna is easy to be integrated with microwave circuitry. By using one rectangular CSRR on rectangular patch, the WLAN band from 4.8 to 5.9 GHz is rejected. By cutting off two small rectangles in the lower corners of the rectangular patch, Antenna 2 is finally proposed, and UWB impedance matching from 3.1 to 12.6 GHz is achieved. The final proposed antenna is fabricated on a low-cost FR4 substrate and measured, and the measured and simulated results show an acceptable agreement. The antenna is validated to perform good radiation properties such as nearly stable radiation patterns, high gain, and high radiation efficiency.

Broadband circularly polarized printed falcate‐shaped monopole antenna

“…The designed resonance frequency can be obtained by adjusting the width w r or length l r of the rectangular SRR. And the width of the ring d 1 and the gap of the ring g are used to fine tune the resonance frequency 27 . The rectangular SRR acts as a magnetic dipole along z direction and the right‐angle trapezoid stub acts as an electric dipole along y direction.…”