Compact dualband filter with wide upper stopband

Pramod K. Singh, Sarbani Basu, Yeong-Her Wang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A compact dualband filter with wide upper stopband using folded stepped impedance resonators (SIRs) and open stub is presented in this letter. The anti-parallel coupled SIRs are used for the realization of the dual passband and open stubs for the widening of the upper stopband. The SIRs are folded for the compact filter size. Two different folding structures are investigated for the size compactness and the frequency response of the filter. The wide stopband is useful for suppressing harmonics and noise in the RF circuit. Dualband filters at frequencies of 2.45/5.25 GHz and 2.45/5.75 GHz are realized. The wide and deep upper stopband as well as deep mid-stopband are achieved. The size of the filters are less than 190 mm2 on a RO 4003C (εr = 3.38, h = 0.81 mm) substrate.

Original languageEnglish
Pages (from-to)804-808
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume51
Issue number3
DOIs
Publication statusPublished - 2009 Mar 1

Fingerprint

Resonators
filters
resonators
impedance
folding structures
Frequency response
void ratio
Networks (circuits)
frequency response
Substrates
harmonics

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

Singh, Pramod K. ; Basu, Sarbani ; Wang, Yeong-Her. / Compact dualband filter with wide upper stopband. In: Microwave and Optical Technology Letters. 2009 ; Vol. 51, No. 3. pp. 804-808.
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Compact dualband filter with wide upper stopband. / Singh, Pramod K.; Basu, Sarbani; Wang, Yeong-Her.

In: Microwave and Optical Technology Letters, Vol. 51, No. 3, 01.03.2009, p. 804-808.

Research output: Contribution to journalArticle

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