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Compact UWB BPF using slotted resonator with an independently controllable notched band

Published online by Cambridge University Press:  11 September 2014

Gholamreza Karimi ,
Farnaz Khamin-Hamedani  and
Hesam Siahkamari
Gholamreza Karimi*
Affiliation:
Electrical Engineering Department, Faculty of Engineering, Razi University, Kermanshah 67149, Iran. Phone: +98 831 4275436
Farnaz Khamin-Hamedani
Affiliation:
Deprtment of Electrical Engineering, Kermanshah Science and Research Branch, Islamic Azad University, Kermanshah, Iran
Hesam Siahkamari
Affiliation:
Electrical Engineering Department, Faculty of Engineering, Razi University, Kermanshah 67149, Iran. Phone: +98 831 4275436
*
Corresponding author: G. Karimi Email: ghkarimi@razi.ac.ir
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Abstract

In this paper, a novel compact ultra-wideband (UWB) bandpass filter (BPF) without and with one sharply notched band is presented. The UWB bandpass characteristic is achieved using slotted resonators (SR) and a notch is obtained by spiral defected ground structure (SDGS) without any change in SR structure. Center frequency of the notched band can be easily changed (from 5 to 9 GHz) by tuning the dimensions of SDGS. To verify the feasibility of the proposed filter, two UWB BPFs, one without the notched band and the other with a notched band, at 8.0 GHz are developed and fabricated, there by suppressing the spurious satellite-communication signal within passband. Measured results of two fabricated filters have the advantages of wide −3 dB bandwidth from 3.1 to 10.6 GHz (which satisfies the requirements of US Federal Communication Commission -specified UWB limits), compact size, low insertion loss (<0.6 dB), and a wide upper stopband with high attenuation (−20 to −50 dB).

Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 1 , February 2016 , pp. 25 - 31
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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References

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