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HMSIW based highly selective filter for radar applications

Keyur Mahant (CHARUSAT Space Research and Technology Center, V T. Patel Department of Electronics and Communication Engineering, Charotar University of Science and Technology Changa, India)
Hiren K. Mewada (Prince Mohammad Bin Fahd University, Al Khobar, Kingdom of Saudi Arabia)
Amit V. Patel (CHARUSAT Space Research and Technology Center, V T. Patel Department of Electronics and Communication Engineering, Charotar University of Science and Technology Changa, India)
Alpesh Vala (CHARUSAT Space Research and Technology Center, V T. Patel Department of Electronics and Communication Engineering, Charotar University of Science and Technology Changa, India)
Jitendra Chaudhari (CHARUSAT Space Research and Technology Center, V T. Patel Department of Electronics and Communication Engineering, Charotar University of Science and Technology Changa, India)

Circuit World

ISSN: 0305-6120

Article publication date: 4 July 2020

Issue publication date: 8 June 2021

123

Abstract

Purpose

This paper aims to present, design and implement a novel half-mode substrate integrated waveguide (HMSIW)-based narrow bandpass filter, which offers advantages like low insertion loss, compact size and high selectivity. Proposed filter will be used in the K-band automotive radar application.

Design/methodology/approach

The filtering response in the proposed design is achieved by inserting inductive posts in the HMSIW cavity. Ansoft high frequency structure Simulator (HFSS) is used for the simulation of the proposed structure, which is a three-dimensional full-wave solver using the finite element method (FEM). The proposed filter is fabricated on the dielectric material RT duroid 5,880 with the dielectric constant ɛr = 2.2, dissipation factor t and = 4 × 10–4 and height h = 0.508 mm.

Findings

Frequency tuning is also carried out by changing the lateral distance between two inductive posts. Moreover, a comparison of the proposed structure with the previously published work is presented. Proposed method provides the unique advantages such as low insertion loss, high selectivity and compact in size.

Originality/value

Indigenous method has been used for the development of the filter. Proposed filter will be used in transmitter subsystem of the K-band radar system operating at the center frequency of 11.2 GHz. Measurement results are well-matched with the simulated one. Obtained measured result shows return loss of 20.39 dB and insertion loss of 1.59 dB with 3 dB fractional bandwidth (FBW) of 2.58% at the center frequency of 11.2 GHz.

Keywords

Citation

Mahant, K., Mewada, H.K., Patel, A.V., Vala, A. and Chaudhari, J. (2021), "HMSIW based highly selective filter for radar applications", Circuit World, Vol. 47 No. 2, pp. 206-212. https://doi.org/10.1108/CW-03-2020-0039

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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