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A novel Ka-band MMIC coupled filter with harmonic suppression

Jin Guan (College of Physical, Sichuan University, Chengdu, China and The 10th Research Institute of China Electronics Technology Group Corporation, Chengdu, China)
Min Gong (College of Physical, Sichuan University, Chengdu, China)
Bo Gao (College of Physical, Sichuan University, Chengdu, China)

Circuit World

ISSN: 0305-6120

Article publication date: 3 February 2020

Issue publication date: 18 June 2020

121

Abstract

Purpose

A novel Ka-band compact parallel-coupled microstrip bandpass filter with harmonic suppression performance has been designed, implemented and tested on GaAs MMIC.

Design/methodology/approach

This proposed filter consists of modified coupled-line units with T-shaped open-stubs.

Findings

The proposed filter with T-shaped open-stubs is valuable in performance with low loss at fundamental frequency, suppression at harmonic frequencies and small size. The simulation is based on full-wave electromagnetic analysis and the measurement is based on chip test. It shows an insertion loss below 1.2 dB, return loss better than 20 dB in the pass band and high than 28 dB suppression at harmonic frequencies.

Originality/value

This Ka-band MMIC filter with harmonic suppression is attractive for the millimeter-wave system.

Keywords

Citation

Guan, J., Gong, M. and Gao, B. (2020), "A novel Ka-band MMIC coupled filter with harmonic suppression", Circuit World, Vol. 46 No. 3, pp. 169-173. https://doi.org/10.1108/CW-08-2019-0092

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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