Microstrip lowpass-highpass diplexer for a quadplexer application

Minjae Jung, Byung Wook Min

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A microstrip low-loss diplexer is designed based on a lowpass and highpass Chebyshev filter configuration and combined with two duplexers for a quadplexer application. A 50-Ω transmission line is added to the lowpass filter to have a high impedance at the highpass frequency band, resulting in low loss and high isolation. To minimize size of the diplexer, high impedance meander lines, interdigitated capacitors, and stepped impedance transmission lines are used. The proposed diplexer has the isolation higher than 41 dB with the insertion loss less than 1.6 dB at the designed frequencies. The designed quadplexer has a good transmission performances at all four frequency bands, and can be used for a dual-band frequency division multiplexing system with a dual-band/broadband antenna.

Original languageEnglish
Pages (from-to)2026-2028
Number of pages3
JournalMicrowave and Optical Technology Letters
Volume56
Issue number9
DOIs
Publication statusPublished - 2014 Sep

Fingerprint

Frequency bands
Electric lines
Chebyshev filters
impedance
Frequency division multiplexing
transmission lines
isolation
duplexers
Insertion losses
filters
frequency division multiplexing
meanders
Capacitors
Antennas
insertion loss
capacitors
antennas
broadband
configurations

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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abstract = "A microstrip low-loss diplexer is designed based on a lowpass and highpass Chebyshev filter configuration and combined with two duplexers for a quadplexer application. A 50-Ω transmission line is added to the lowpass filter to have a high impedance at the highpass frequency band, resulting in low loss and high isolation. To minimize size of the diplexer, high impedance meander lines, interdigitated capacitors, and stepped impedance transmission lines are used. The proposed diplexer has the isolation higher than 41 dB with the insertion loss less than 1.6 dB at the designed frequencies. The designed quadplexer has a good transmission performances at all four frequency bands, and can be used for a dual-band frequency division multiplexing system with a dual-band/broadband antenna.",
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Microstrip lowpass-highpass diplexer for a quadplexer application. / Jung, Minjae; Min, Byung Wook.

In: Microwave and Optical Technology Letters, Vol. 56, No. 9, 09.2014, p. 2026-2028.

Research output: Contribution to journalArticle

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