Title: Compact UWB filter with narrow notched band based on grounded circular patch resonator

Authors: Mona Yazdani Shavakand; Javad Ahmadi-Shokouh

Addresses: Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran ' Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran

Abstract: In this paper, a compact ultra-wideband (UWB) band-pass filter (BPF) with a single narrow notched band is proposed. This filter is designed using a novel multiple-mode resonator (MMR) based on a grounded circular patch resonator (GCPR). The proposed MMR generates three main resonances and two transmission zeros (TZs). A semi-lozenge slot (SLS) is proposed to control resonant frequencies and obtain UWB operation. The 3dB notched band is achieved from 5.65-5.8 GHz by connecting an arrowhead stub inside the filter. The UWB filter has been simulated, fabricated and measured. The dimension of the designed filter is about 0.31 × 0.31 λg × λg.

Keywords: band-pass filter; BPF; circular patch resonator; compact; ultra-wideband; UWB; notched band.

DOI: 10.1504/IJUWBCS.2019.101173

International Journal of Ultra Wideband Communications and Systems, 2019 Vol.4 No.1, pp.16 - 21

Received: 15 Jan 2018
Accepted: 19 Mar 2018
Published online: 26 Jul 2019 *