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Parallel-coupled stub-loaded resonator bandpass filter with ultra-wideband passband on multilayer liquid crystal polymer substrates

Published online by Cambridge University Press:  09 July 2015

S. Almorqi ,
H. Shaman  and
A. Alamoudi
S. Almorqi
Affiliation:
King Abdulaziz City for Science and Technology, National Centre for Sensors and Defense Systems Technologies (NCSDST), Riyadh 11442, Saudi Arabia. Phone: +966 533742626
H. Shaman*
Affiliation:
King Abdulaziz City for Science and Technology, National Centre for Sensors and Defense Systems Technologies (NCSDST), Riyadh 11442, Saudi Arabia. Phone: +966 533742626
A. Alamoudi
Affiliation:
King Abdulaziz City for Science and Technology, National Centre for Sensors and Defense Systems Technologies (NCSDST), Riyadh 11442, Saudi Arabia. Phone: +966 533742626
*
Corresponding author: H. Shaman Email: hshaman@kacst.edu.sa
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Abstract

A multilayer bandpass filter with ultra-wideband passband is presented in this paper. The filter is designed to have a very wide passband with a fractional bandwidth of about 180% at a center frequency of 10.5 GHz. The filter consists of two sections of parallel-coupled lines loaded at the center with short-circuited stub. Each of the coupled line sections and short-circuited stubs is designed to be a quarter-wavelength long at the desired center frequency. As a result, the filter exhibited a selective filtering characteristic equivalent to a five-pole Chebyshev filter with a very low insertion loss. The proposed filter is realized and fabricated using multilayer liquid crystal polymer substrate. The design is successfully realized in theory and verified by full-wave electromagnetic simulation of the full layout and the experiment where excellent agreement is obtained.

Keywords

FiltersPassive components and circuits
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 8 , December 2016 , pp. 1183 - 1186
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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