Vol. 114

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2021-07-19

A Novel Miniaturized L-Band Filter with Great Stopband Characteristics Using Interdigitated Coupled Lines CRLH-TL Structure

By Peng Wang, Kaiyue Duan, Minquan Li, Man Zhang, and Baokun Jin
Progress In Electromagnetics Research C, Vol. 114, 57-67, 2021
doi:10.2528/PIERC21051105

Abstract

This paper proposes a novel bandpass filter for L-band based on CRLH TL, which is mainly formed by coupling a high-pass characteristic module with a low-pass characteristic module in a cascade. The high-pass module consists of an interdigitated coupled line and a grounding via, owning to its singular characteristics, which the miniaturization is realized. The low-pass module is composed of a C-type resonator with high-low impedance lines, which can realize great sideband attenuation characteristics. To further improve its out-of-band rejection characteristics, a complementary split-ring resonator (CSRR) defective ground structure with single-pole attenuation characteristics is loaded, and a transmission zero is introduced at 2.5f0 out-of-band. The test results are in great agreement with the simulation ones, and the dimensions are only 0.20λg*0.22λg. Compared with other similar types, the filter proposed in this paper has miniaturization, great passband selection characteristics, stopband characteristics, and the advantage of low insertion loss.

Citation


Peng Wang, Kaiyue Duan, Minquan Li, Man Zhang, and Baokun Jin, "A Novel Miniaturized L-Band Filter with Great Stopband Characteristics Using Interdigitated Coupled Lines CRLH-TL Structure," Progress In Electromagnetics Research C, Vol. 114, 57-67, 2021.
doi:10.2528/PIERC21051105
http://www.jpier.org/PIERC/pier.php?paper=21051105

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