Title: Compact planar UWB filter using cascaded resonators

Authors: C.J. Bindu; Anju Pradeep; S. Mridula; P. Mohanan

Addresses: Division of Electronics, Cochin University of Science and Technology (CUSAT), Kochi, Kerala, 682022, India ' Division of Electronics, School of Engineering, Cochin University of Science and Technology (CUSAT), Kochi, Kerala, 682022, India ' Division of Electronics, School of Engineering, Cochin University of Science and Technology (CUSAT), Kochi, Kerala, 682022, India ' Centre for Research in Electromagnetics and Antennas (CREMA), Department of Electronics, Cochin University of Science and Technology, Cochin, Kerala, 682022, India

Abstract: This paper presents a planar ultra wide band filter employing chip inductors and complementary split ring resonators. Asymmetric interdigital coupled lines are used for achieving bandpass characteristics. Lower side transmission zeros are introduced using LC resonators consisting of chip inductors and circular patch capacitors. The filter has low insertion loss and flat group delay in its passband, steep roll off rate and good stopband attenuation. Measurement results for transmission and reflection characteristics of the fabricated filter are in good agreement with simulated response.

Keywords: chip inductors; complementary split ring resonators; CSRR; interdigital coupled lines; lumped element model; stepped impedance resonators; step response; compact UWB filters; planar UWB filters; cascaded resonators; ultra wideband filters; insertion loss; flat group delay; roll off rate; stopband attenuation; transmission; reflection; simulation.

DOI: 10.1504/IJUWBCS.2015.077101

International Journal of Ultra Wideband Communications and Systems, 2015 Vol.3 No.2, pp.75 - 84

Received: 07 Oct 2014
Accepted: 14 Mar 2015
Published online: 21 Jun 2016 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article