Multi-path design for stepped-impedance low-pass filter to create transmission zeros and wide rejection band

2006 ◽  
Author(s):  
Min-Chieh Kang ◽  
Jen-Tsai Kuo
Keyword(s):  
Pass Filter ◽  
Low Pass Filter ◽  
Transmission Zeros ◽  
Path Design ◽  
Low Pass ◽  
Rejection Band

scholarly journals Compact D-CRLH resonator for low-pass filter with wide rejection band, high roll-off, and transmission zeros

2018 ◽  
Vol 11 (5-6) ◽  
pp. 509-516 ◽  
Author(s):  
Dilip Kumar Choudhary ◽  
Mahmoud A. Abdalla ◽  
Raghvendra Kumar Chaudhary
Keyword(s):  
Filter Design ◽  
Short Circuit ◽  
Tank Circuit ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Filter Bandwidth ◽  
Transmission Zeros ◽  
Low Pass ◽  
Lc Tank ◽  
Rejection Band

AbstractA compact low-pass filter (LPF) with wide rejection band based on T-type circuit of an enhanced dual composite right-/left-handed (D-CRLH) resonator is presented in this paper. The resonator has only one cell with series and parallel tank circuit. The parallel LC tank circuit has been realized by an interdigital capacitor and one shorted finger, whereas its series LC tank circuit is realized by an air gap capacitance and a short circuit stub. The filter has wide rejection band bandwidth with three transmission zeros (TZs). The filter bandwidth and TZs frequencies are controlled by the D-CRLH element values. The results of the proposed filter demonstrate minimum insertion loss in passband, high roll-off rate, and good figure of merit. The measured results are in good agreement with the simulated results. The detailed filter design is discussed in terms of circuit modeling, dispersion analysis, and full-wave simulation. Finally, the filter size is compact (0.10 λg × 0.15 λg) at cut-off frequency.

scholarly journals Stopband-Extended and Size-Miniaturized Low-Pass Filter with Three Transmission Zeros

ETRI Journal ◽  
2014 ◽  
Vol 36 (2) ◽  
pp. 286-292 ◽  
Author(s):  
Lin Li ◽  
Jia Bao ◽  
Jing-jing Du ◽  
Yaming Wang
Keyword(s):  
Pass Filter ◽  
Low Pass Filter ◽  
Transmission Zeros ◽  
Low Pass

Design and fabrication of wide and deep rejection band microstrip low-pass filter

2017 ◽  
Vol 12 (01) ◽  
pp. P01023-P01023 ◽  
Author(s):  
M. Challal ◽  
A. Badaoui ◽  
F. Hachour
Keyword(s):  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Rejection Band

Stopband-Extended and Size-Miniaturized Low-Pass Filter Based on Interdigital Capacitor Loaded Hairpin Resonator with Four Transmission Zeros

Frequenz ◽  
2018 ◽  
Vol 72 (5-6) ◽  
pp. 221-226 ◽  
Author(s):  
Jia-Jia Wu ◽  
Lin Li
Keyword(s):  
Transmission Line ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Interdigital Capacitor ◽  
Transmission Zeros ◽  
High Impedance ◽  
Compact Size ◽  
Low Pass ◽  
Hairpin Resonator

AbstractIn this paper, a compact low-pass filter (LPF) with wide stopband is proposed based on interdigital capacitor loaded hairpin resonator. The structure composed of an upper high-impedance transmission line, a middle interdigital capacitor, and a pair of inter-coupled symmetrical stepped-impedance stubs. Detailed investigation into this structure based on even-odd mode approach reveals that up to four transmission zeros can be generated and reallocated by choosing the proper circuit parameters. And owing to the aid of transmission zeros, the fabricated quasi-elliptic LPFs experimentally demonstrate a wide 20dB stopband from 1.4fcto 5.1fcusing a compact size of only 0.005 λg2.

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