Compact Quadband Bandstop Filter Based on Concentric Split Ring Resonators with Perturbation for Multifunctional Wireless Systems
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2022-05-20 |
| Journal | International Journal of Antennas and Propagation |
| Authors | Pierre Moukala Mpele |
| Institutions | Pan African University Institute for Basic Sciences, Technology and Innovation, Marien Ngouabi University |
| Citations | 1 |
Abstract
Section titled “Abstract”Bandstop filters play an essential role in many radio frequency (RF) and microwave communication systems to block undesired signals or reject spurious harmonics. This paper presents the design and experiment of a compact quadband bandstop filter centered at 1.2/1.97/2.96/4.78 GHz with a passband insertion loss ranging from 1.07 to 2.9 dB. The overall volumetric size of the proposed filter is 0.197 <a:math xmlns:a=“http://www.w3.org/1998/Math/MathML” id=“M1”> <a:msub> <a:mrow> <a:mi>λ</a:mi> </a:mrow> <a:mrow> <a:mi>g</a:mi> </a:mrow> </a:msub> </a:math> × 0.197 <c:math xmlns:c=“http://www.w3.org/1998/Math/MathML” id=“M2”> <c:msub> <c:mrow> <c:mi>λ</c:mi> </c:mrow> <c:mrow> <c:mi>g</c:mi> </c:mrow> </c:msub> </c:math> × 0.01 <e:math xmlns:e=“http://www.w3.org/1998/Math/MathML” id=“M3”> <e:msub> <e:mrow> <e:mi>λ</e:mi> </e:mrow> <e:mrow> <e:mi>g</e:mi> </e:mrow> </e:msub> </e:math> , where <g:math xmlns:g=“http://www.w3.org/1998/Math/MathML” id=“M4”> <g:msub> <g:mrow> <g:mi>λ</g:mi> </g:mrow> <g:mrow> <g:mi>g</g:mi> </g:mrow> </g:msub> </g:math> is the guided wavelength at 1.2 GHz. The desired performance is achieved by introducing two diamond-shaped concentric split ring resonators (DSCSRRs) intercoupled and defected ground structure. The metamaterial properties of the DSCSRR have been verified by extracting and analyzing its effective permittivity and permeability. This research shows that DSCSRRs can generate multiband characteristics and yield high selectivity with good band-to-band isolation by generating transmission zeros between passbands. The filter is designed, optimized, and analyzed using High-Frequency Structural Simulator (HFSS). A good agreement is observed between simulated and experimental results. The measured results demonstrate that the proposed quadband banstop filter exhibits a minimum stopband rejection of 11.22 dB and fractional bandwidth greater than 4.51%, which makes it suitable for front-end transceiver components or multifunctional wireless systems to suppress unwanted signals at four separate frequency bands.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 2015 - Design methods of multi-band filters [Crossref]