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PIER PIER B PIER C PIER M PIER Letters
2009-06-13
X-Band Miniaturized Wideband Bandpass Filter Utilizing Multilayered Microstrip Hairpin Resonator
By
Helmi Adam,

    Mr. Helmi Adam

    Computer and Communication System Engineering

    Universiti Putra Malaysia

    Malaysia

    Homepage

Alyani Ismail,

    Professor Alyani Ismail

    Department of Computer and Communication System Engineering

    Universiti Putra Malaysia

    Malaysia

    Homepage

Mohd Adzir Mahdi,

    Dr. Mohd Adzir Mahdi

    Department of Computer and Communication Systems Engineering

    Faculty of Engineering, Universiti Putra Malaysia (UPM)

    Malaysia

    Homepage

Mohammad Shahrazel Razalli,

    Dr. Mohammad Shahrazel Razalli

    School of Computer & Communication Engineering

    Universit Malaysia Perlis

    Malaysia

    Homepage

Adam Reda Hasan Alhawari,

    Dr. Adam Reda Hasan Alhawari

    Electrical Engineering

    Najran University

    Saudi Arabia

    Homepage

Babak Kazemi Esfeh

    Dr. Babak Kazemi Esfeh

    Universiti Putra Malaysia

    Malaysia

    Homepage

Progress In Electromagnetics Research, Vol. 93, 177-188, 2009
doi:10.2528/PIER09042202
Abstract
This paper presents a new design of miniaturized wideband bandpass filter using microstrip hairpin in multilayer configuration for X-band application. The strong coupling required for wideband filter is realized by arranging five hairpin resonators in two layers on different dielectric substrates. Since adjacent resonator lines are placed at different levels, there are two possible ways to change coupling strength by varying the overlapping gap between two resonators; vertically and horizontally. In this paper, simulated and measured result for a wideband filter of 4.4 GHz bandwidth at 10.2 GHz center frequency with fifth order Chebyshev response is proposed. The filter is fabricated on 0.254 mm thickness R/T Duroid 6010 and R/T Duroid 5880 with dielectric constant 10.2 and 2.2 respectively using standard photolithography technique. Two filter configurations based on vertical (Type 1) and horizontal (Type 2) coupling variation to optimize the coupling strength are presented and compared. Both configurations produce very small and compact filter size, at 5.0 x 14.6 mm2 and 3.2 x 16.1 mm2 for the first and second proposed filter type respectively. The measured passband insertion losses for both filters are less than 2.3 dB and the passband return loss is better than -16 dB for filter Type 1 and -13 dB for filter Type 2. Very small and compact filter is achieved where measured results show good agreement with the simulated responses.
Citation
Helmi Adam, Alyani Ismail, Mohd Adzir Mahdi, Mohammad Shahrazel Razalli, Adam Reda Hasan Alhawari, and Babak Kazemi Esfeh, "X-Band Miniaturized Wideband Bandpass Filter Utilizing Multilayered Microstrip Hairpin Resonator," Progress In Electromagnetics Research, Vol. 93, 177-188, 2009.
doi:10.2528/PIER09042202
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