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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2008-02-12
Novel Enhanced and Miniaturized 90° Coupler for 3G Eh Mixers
By
Souren Shamsinejad,

    Mr. Souren Shamsinejad

    Electrical Engineering Department

    Iran University of Science and Technology (IUST)

    Iran

    Homepage

Mohammad Soleimani,

    Dr. Mohammad Soleimani

    Department of Electrical Engineering

    Iran University of Science and Technology

    Iran

    Homepage

Nader Komjani

    Professor Nader Komjani

    Department of Electrical Engineering

    Iran University of Science and Technology

    Iran

    Homepage

Progress In Electromagnetics Research Letters, Vol. 3, 43-50, 2008
doi:10.2528/PIERL08012702 | Google Scholar

Abstract
This paper reports the miniaturization of a microstrip 90 degree coupler by substituting the quarter wave transmission lines employed in conventional 90 degree coupler with its equal circuits consisting of two oblique stubs and an inductor and capacitors. Reduction of the coupler to 27% its size is reported here. This coupler is designed at 1070MHz for using in even harmonic mixers of 3G mobile receivers. Furthermore, the coupler can accurately divide the input signal by two parts with the same power and 90 degree phase difference. Also, the reflection coefficient and the isolation are as good as conventional one and coupling procedure is better than it.
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Citation
Souren Shamsinejad, Mohammad Soleimani, and Nader Komjani, "Novel Enhanced and Miniaturized 90° Coupler for 3G Eh Mixers," Progress In Electromagnetics Research Letters, Vol. 3, 43-50, 2008.
doi:10.2528/PIERL08012702
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