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Compact microstrip band-pass filter for EMI reduction

Hagihassan, Hussein Mohamed (2014) Compact microstrip band-pass filter for EMI reduction. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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A compact microstrip band-pass filter design using parallel coupled lines is presented in this work. The parallel coupled resonator's dimensions are calculated theoretically and the equivalent circuit is analyzed. The frequency response is then approximated using CST software. The filter is integrated with Defected Ground Structure (DGS) to alter current distribution over the ground plane and hence changing the resonance properties of the filter's element. The proposed structure offers a simple and compact design while exhibiting wide stop-band characteristics in comparison with conventional coupled microstrip line filter design. The fabrication and measurements of 2GHz prototype DGS integrated parallelcoupled bandpass filter are presented. The measured results agree well with the simulations and calculations data. The introduction of DGS suppresses the second, third and fourth harmonic responses enhancing the stop band criteria. In addition, the DGS causes resonance frequency shift on some resonator elements, miniaturizing the length and make the overall size 20.8% more compact compared to the conventional ones.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
Depositing User: Normajihan Abd. Rahman
Date Deposited: 30 Apr 2015 01:43
Last Modified: 30 Apr 2015 01:43
URI: http://eprints.uthm.edu.my/id/eprint/6719
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