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Design of ultra compact dual-band bandpass filter using L-shaped resonator

Published online by Cambridge University Press:  18 January 2017

Yeganeh Pourasad  and
Gholamreza Karimi
Yeganeh Pourasad
Affiliation:
Department of Electrical Engineering, College of Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran Department of Electrical Engineering, College of Engineering, Kermanshah Science and Research Branch, Islamic Azad University, Kermanshah, Iran
Gholamreza Karimi*
Affiliation:
Department of Electrical Engineering, College of Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran Department of Electrical Engineering, College of Engineering, Kermanshah Science and Research Branch, Islamic Azad University, Kermanshah, Iran
*
Corresponding author: G. Karimi Email: ghkarimi@razi.ac.ir
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Abstract

A compact dual-band microstrip bandpass filter (BPF) is presented for application at the frequencies 2.4 and 5.84 GHz. The proposed main resonator consists of two L-shaped resonators. To improve the upper-stopband of the proposed filter, modified U-Shaped resonators are accepted. The operation mechanism of the filter is investigated based on proffered equivalent-circuit model and transformation function. The sketched dual-band BPF attends the insertion loss less than 0.1 and 0.4 dB Also the return loss is 26 and 28 dB at 2.4 and 5.84, respectively. This proffered filter structure is proper for Bluetooth and wireless local area networks and other wireless communication systems. An overall good agreement between measured and simulated results is observed.

Keywords

Bandpass microstrip filterL-shaped resonatorsDual bandLC equivalent circuit
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 3 , April 2017 , pp. 493 - 497
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

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