Stepped impedance hairpin design of a tunable bandpass filter with harmonic suppression

Yu Wei Chen, Min-Hua Ho

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Stepped impedance hairpin resonators (SIHRs) with harmonic suppression and capability of frequency tuning are incorporated into a bandpass filter design. A tapped-in U-shaped feed structure is introduced to suppress harmonics and to reduce the passband insertion losses. The passband flexibility is accomplished by using a pair of tuning varactors. A simple method to implant a zero in the frequency response is also studied herein to further deepen the passband skirt. A 176% (4.32 GHz) stopband bandwidth is observed under more than 20-dB band rejection. A measured minimum insertion loss of 1.19 dB is observed for the circuit with absence of the tuning varactors. Using the varactors, this filter has achieved a 22% frequency tuning range with all the insertion losses less than 5 dB.

Original languageEnglish
Pages (from-to)697-701
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume48
Issue number4
DOIs
Publication statusPublished - 2006 Apr 1

Fingerprint

Bandpass filters
bandpass filters
varactor diodes
Varactors
Tuning
Insertion losses
tuning
insertion loss
retarding
impedance
harmonics
skirts
rejection
frequency response
Frequency response
Resonators
flexibility
resonators
bandwidth
Bandwidth

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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Stepped impedance hairpin design of a tunable bandpass filter with harmonic suppression. / Chen, Yu Wei; Ho, Min-Hua.

In: Microwave and Optical Technology Letters, Vol. 48, No. 4, 01.04.2006, p. 697-701.

Research output: Contribution to journalArticle

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