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Differential-mode Bandpass Filter with Wideband Behaviour Featuring Intrinsic Common-mode Suppression

Authors:
Khaled Aliqab
Meshari Alsharari
Ammar Armghan
Spyridon Nektatios Daskalkis

Keywords: Differential filters, Wideband filters, common-mode suppression, Balanced filters.

Abstract:
This study introduces a differential-mode bandpass filter (BPF) implemented using microstrip topology, specifically designed for wideband applications. The introduced filter is designed using branch-line configuration, incorporating input and output (I/O) cross-coupling to enhance performance. Notably, the design achieves an exceptional common-mode suppression exceeding 40 dB while maintaining structural simplicity. To validate its effectiveness, this filter is manufactured in-house and experimentally tested. The measurement responses closely align with theoretical predictions, demonstrating strong agreement and confirming the feasibility of the proposed design.

Pages: 1 to 4

Copyright: Copyright (c) IARIA, 2025

Publication date: May 18, 2025

Published in: conference

ISSN: 2308-3964

ISBN: 978-1-68558-275-3

Location: Nice, France

Dates: from May 18, 2025 to May 22, 2025