Very Small Dual Band-Notched Rectangular Slot Antenna With Enhanced Impedance Bandwidth

Abstract

 Abstract-A very small coplanar waveguide (CPW)-fed rectangular slot antenna with dual band notched characteristics for super ultrawideband (UWB) applications is proposed. This antenna consists of a rectangular slot, a beveled rectangular patch, two S-shaped slits cut in the ground plane and an elliptical ring slot (ERS) etched in the patch. The corners of a simple rectangular patch are beveled to improve the impedance bandwidth, especially at the middle frequencies of the band. In addition, a pair of semi-circle slots are etched in the ground plane to enhance the bandwidth to more than 23 GHz. A pair of S-shaped slits connected to the rectangular slot, and an elliptical ring slot cut in the beveled rectangular patch, are employed to create band notched performances in WiMAX and WLAN spectrum, respectively. The proposed antenna has a very small size of 15×15 mm 2 , and therefore it is one of the smallest ultra wideband slot antennas which have been reported until now, and provides a very wide impedance bandwidth from 2.6 to more than 23 GHz for VSWR<2 with dual band notched properties. Index Terms-S-shaped and elliptical ring slots, beveled rectangular slot, dual band-notched properties, semi-circle slot.0018-926X (c)

Compact ultra‐wideband slot antenna with three notched‐band characteristics

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