Dual-band-rejection filter for distortion reduction in RF transmitters

Hiromitsu Uchida*, Hirotaka Kamino, Kazuyuki Totani, Naofumi Yoneda, Moriyasu Miyazaki, Yoshihiko Konishi, Shigeru Makino, Jiro Hirokawa, Makoto Ando

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)

Abstract

A novel concept of dual-band-rejection filter (DBKF) is proposed with its circuit synthesis procedure and examples of its j realization with dielectric resonators and microstrip resonators. A DBRF can make two closely spaced rejection bands and a passband between them, with lower loss than a bandpass filter having the same number of resonators and the same frequency selectivity just around the passband. The DBRF can be synthesized by applying novel frequency-variable transformations to a prototype LPF, and its physical size can be smaller than a simple cascade of two conventional band-rejection filters with different rejection bands. The DBRF can be especially applicable to distortion reduction filter in RF transmitters.

Original languageEnglish
Pages (from-to)2550-2556
Number of pages7
JournalIEEE Transactions on Microwave Theory and Techniques
Volume52
Issue number11
DOIs
Publication statusPublished - 2004 Nov
Externally publishedYes

Keywords

  • Bandstop (rejection) filters
  • Circuit synthesis
  • Dielectric resonators
  • Dual band
  • Microstrip resonators

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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