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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2018-08-12
Compact Microstrip Lowpass Filter with Ultra-Wide Stopband Performance Using Radial Stub Loaded Resonators
By
Hai Zhang,

    Dr. Hai Zhang

    Department of Electrical and Computer Engineering

    University of Wisconsin

    USA

    Homepage

Junding Zhao

    Prof. Junding Zhao

    Ministerial Key Laboratory of JGMT

    Nanjing University of Science and Technology (NUST)

    China

    Homepage

Progress In Electromagnetics Research M, Vol. 71, 199-203, 2018
doi:10.2528/PIERM18052909 | Google Scholar

Abstract
A new microstrip lowpass filter using radial stub loaded resonators is presented. A microstrip high impedance main transmission line loaded with five radial stub loaded resonators by five high impendence transmission lines is introduced in the design of the filter. Owing to the introduction of the radial stub structure, the filter achieves compact size and ultra-wide stopband. A demonstration filter with 3 dB cutoff frequency at 0.8 GHz has been designed, fabricated and measured. Results indicate that the proposed filter is able to suppress the 17th harmonic response referred to a suppression degree of 15 dB, together with a small size of 0.060λg×0.080λg, where λg is the guided wavelength at 0.8 GHz.
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Citation
Hai Zhang, and Junding Zhao, "Compact Microstrip Lowpass Filter with Ultra-Wide Stopband Performance Using Radial Stub Loaded Resonators," Progress In Electromagnetics Research M, Vol. 71, 199-203, 2018.
doi:10.2528/PIERM18052909
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