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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2017-09-22
Miniature Triple-Mode Diplexer with Good Selectivity
By
Sugchai Tantiviwat,

    Dr. Sugchai Tantiviwat

    School of Computer and Communication Engineering (SCCE)

    Universiti Malaysia Perlis (UniMAP)

    Malaysia

    Homepage

Mohammad Shahrazel Razalli,

    Dr. Mohammad Shahrazel Razalli

    School of Computer & Communication Engineering

    Universit Malaysia Perlis

    Malaysia

    Homepage

Siti Zuraidah Binti Ibrahim

    Dr. Siti Zuraidah Binti Ibrahim

    School of Computer and Communication Engineering

    Universiti Malaysia Perlis (UniMAP)

    Malaysia

    Homepage

Progress In Electromagnetics Research Letters, Vol. 70, 75-80, 2017
doi:10.2528/PIERL17071503 | Google Scholar

Abstract
This paper presents a compact diplexer with high selectivity. The proposed diplexer employs two sets of triple-mode bandpass lters. Using this approach, the pair of even-mode resonant frequencies can be flexibly controlled by adjusting the characteristic impedance or electrical lengths of the two open-circuited stubs while the odd-mode resonant frequency remains at the fundamental resonant frequency. For a demonstration, a diplexer with two passbands centred at 1.50 and 1.70 GHz and the transmission zeros are created close to the passband edges which extremely improve the skirt selectivity. As a result, the proposed diplexer occupies an extremely small area, i.e., approximately 0.30λg x 0.35λg. The measured results are in good agreement with the simulated predictions.
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Citation
Sugchai Tantiviwat, Mohammad Shahrazel Razalli, and Siti Zuraidah Binti Ibrahim, "Miniature Triple-Mode Diplexer with Good Selectivity," Progress In Electromagnetics Research Letters, Vol. 70, 75-80, 2017.
doi:10.2528/PIERL17071503
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