A Lowpass Filter With Compact Size and Sharp Roll-Off

In this letter, a lowpass filter (LPF) is proposed based on a modified complementary split-ring resonator (CSRR) which can be considered as a traditional rectangular CSRR attached with two C-shaped structures, and a composite resonator composed of a simple uniform line with four stub-loaded stepped...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2015-12, Vol.25 (12), p.790-792
Main Authors: Xiao, Mi, Sun, Guoliang, Li, Xiaozheng
Format: Article
Language:English
Subjects:
Complementary split-ring resonator (CSRR)
Computer simulation
Corners
Equivalence
Equivalent circuits
Filtering theory
Impedance
Low pass filters
lowpass filter (LPF)
Microstrip
Microwaves
Resonators
Stepped
stub-loaded stepped impedance resonator (SLSIR)
Transmission line matrix methods
Transmission lines
Wireless communication
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Summary:In this letter, a lowpass filter (LPF) is proposed based on a modified complementary split-ring resonator (CSRR) which can be considered as a traditional rectangular CSRR attached with two C-shaped structures, and a composite resonator composed of a simple uniform line with four stub-loaded stepped impedance resonators (SLSIRs) connected at the four corners. The LPF was designed using the first two resonant points produced by the composite resonator, and operating mechanisms are investigated based on its equivalent models. The LPF was fabricated and measured. The measured results are in good agreement with the full-wave simulated results, showing the merits of compact size and sharp roll-off.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2015.2496801