Coupled-line band-pass filter with T-shaped structure for high frequency selectivity and stopband rejection

Kai Da Xu, Sen Lu, Yi Ren, Anxue Zhang, Qiang Chen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A coupled-line band-pass filter (BPF) with T-shaped stub structure is presented. Five transmission poles within the passband and eight deep transmission zeros (TZs) from 0 to 2f0 (f0 denotes filter's center frequency) are realized through input impedance calculations. With the simple T-shaped structure, the positions of six TZs can be appropriately adjusted to achieve high frequency selectivity and stopband rejection. For demonstration, a BPF prototype centered at 2.05 GHz is designed and fabricated, whose measured rejection levels are of over 45.5 dB at lower stopband and better than 19.5 dB at upper stopband. The simulation and measurement results are in good agreement, which validates the design idea.

Original languageEnglish
Article numbere22259
JournalInternational Journal of RF and Microwave Computer-Aided Engineering
Volume30
Issue number8
DOIs
Publication statusPublished - 2020 Aug 1

Keywords

  • band-pass filter
  • coupled-line
  • high selectivity
  • stopband rejection
  • T-shaped structure

ASJC Scopus subject areas

  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Coupled-line band-pass filter with T-shaped structure for high frequency selectivity and stopband rejection'. Together they form a unique fingerprint.

Cite this