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PIER PIER B PIER C PIER M PIER Letters
2011-06-15
A Novel Quasi-Elliptic Waveguide Transmit Reject Filter for Ku-Band Vsat Transceivers
By
Zhengbin Xu,

    Dr. Zhengbin Xu

    Southeast University

    China

    Homepage

Jian Guo,

    Dr. Jian Guo

    Southeast University

    China

    Homepage

Cheng Qian,

    Dr. Cheng Qian

    Southeast University

    China

    Homepage

Wen-Bin Dou

    Dr. Wen-Bin Dou

    Southeast University

    China

    Homepage

Progress In Electromagnetics Research, Vol. 117, 393-407, 2011
doi:10.2528/PIER11051601
Abstract
In this paper, a novel compact quasi-elliptic waveguide low-pass transmit reject filter (TRF) by using T-shape units is proposed for Ku-band very small aperture terminal (VSAT) transceivers. The equivalent circuit model of the T-shape unit is investigated and shows a topology similar to that of the elliptic low-pass filter. In order to reduce the difficulty in physical realization, which is commonly encountered with a standard elliptic low-pass filter, an approximate elliptic low-pass filter prototype is presented. Accordingly, a synthesis approach is developed to obtain the initial dimensions of the filter. To optimize the performance of the filter, full-wave electromagnetic simulation is used to fine-tune the dimensions of the filter. An eleven-order Ku-band low-pass TRF is designed and fabricated using a WR-75 waveguide. Measured results show it has a low insertion loss of less than 0.3\,dB in the pass band and a high attenuation slope of 78 dB/GHz. Moreover, the miniaturized size of the filter is only 38 mm × 38 mm × 42 mm (WR-75 flange size is 38 mm × 38 mm).
Citation
Zhengbin Xu, Jian Guo, Cheng Qian, and Wen-Bin Dou, "A Novel Quasi-Elliptic Waveguide Transmit Reject Filter for Ku-Band Vsat Transceivers," Progress In Electromagnetics Research, Vol. 117, 393-407, 2011.
doi:10.2528/PIER11051601
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