scholarly journals Simple dual‐mode balanced bandpass filter with high selectivity and extended common‐mode noise suppression

2018 ◽  
Vol 54 (13) ◽  
pp. 833-835 ◽  
Author(s):  
Hui Gu ◽  
Lei Ge ◽  
Lijie Xu
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Noise Suppression ◽  
Dual Mode ◽  
Common Mode

High selectivity and common‐mode suppression balanced bandpass filter with TM dual‐mode SIW cavity

2019 ◽  
Vol 13 (12) ◽  
pp. 2129-2133 ◽  
Author(s):  
Hong‐wei Deng ◽  
Liang Sun ◽  
Yi‐fan Xue ◽  
Fei Liu ◽  
Tao Xu
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Dual Mode ◽  
Common Mode ◽  
Mode Suppression

HIGH SELECTIVITY DUAL-MODE BANDPASS FILTER WITH SOURCE-LOADED COUPLING

2010 ◽  
Vol 18 ◽  
pp. 187-194 ◽  
Author(s):  
Xue-Shun Zhang ◽  
Yong-Jiu Zhao ◽  
Hong-Wei Deng ◽  
Lu Zhang ◽  
Wen Chen
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Dual Mode

Dual-mode resonator filter with improved feed-lines for dual-band applications

2020 ◽  
Vol 71 (6) ◽  
pp. 433-435
Author(s):  
Shan Shan Gao ◽  
Jia-Lin Li ◽  
Zhe Lin Zhu ◽  
Jia Li Xu ◽  
Yong Xin Zhao
Keyword(s):  
Simple Structure ◽  
High Selectivity ◽  
Bandpass Filter ◽  
Dual Band ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Good Consistency ◽  
Mode Resonator

AbstractAn improved feedline configuration for dual-mode resonator filter is investigated in this paper. Based on the introduced topology, a dual-mode dual-band bandpass filter with center frequencies of 1.8 and 2.4 GHz is optimally designed, fabricated and tested. The introduced dual-band bandpass filter has simple structure and enables high selectivity to be realized due to two pairs of transmission zeros located near to the lower and upper passband, respectively. Both measured and simulated performances are presented with good consistency.

Multilayer SIW Dual-Band Filters with Independent Band Characteristics and High Selectivity

Frequenz ◽  
2019 ◽  
Vol 73 (9-10) ◽  
pp. 293-300
Author(s):  
Dinghong Jia ◽  
Jianqin Deng ◽  
Yangping Zhao ◽  
Ke Wu
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Large Range ◽  
Metal Layer ◽  
Dual Band ◽  
Effective Dimension ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Design Freedom ◽  
Good Agreement

Abstract This work presents an approach to developing dual-mode dual-band substrate integrated waveguide (SIW) bandpass filter based on multilayer process. TE102/TE201 and TE101/TE102 modes are used to feature the two passbands, respectively. To begin with, large range of band location ratios are decided by the effective dimension of the SIW resonator. With reference to the field distribution, independent coupling schemes of the dual-modes are then realized by slots or circular apertures etched on the middle metal layer. It allows to not only introduce a large design freedom of bandwidth but also keep compactness. Finally, source-load and mixed couplings are deployed to produce transmission zeros around the passband in providing a sharp selectivity in the two filters, respectively. The details to independently control the center frequencies and bandwidth of two passbands are also presented. A two-order double-layered and a triple-layered SIW dual-band bandpass filter are prototyped to evaluate the proposed design approach, respectively. Results show a good agreement between simulations and measurements. The proposed filter exhibits flexible design freedom, high selectivity as well as good out-of-band rejection.

scholarly journals A Dual-Mode Bandpass Filter with Multiple Controllable Transmission-Zeros Using T-Shaped Stub-Loaded Resonators

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Zh. Yao ◽  
C. Wang ◽  
N. Y. Kim
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Second Harmonic ◽  
Center Frequency ◽  
Harmonic Frequency ◽  
Dual Mode ◽  
Mode Theory ◽  
Transmission Zeros ◽  
Coupling Capacitance ◽  
Compact Size

A dual-mode broadband bandpass filter (BPF) with multiple controllable transmission-zeros using T-shaped stub-loaded resonators (TSSLRs) is presented. Due to the symmetrical plane, the odd-even-mode theory can be adopted to characterize the BPF. The proposed filter consists of a dual-mode TSSLR and two modified feed-lines, which introduce two capacitive and inductive source-load (S-L) couplings. Five controllable transmission zeros (TZs) can be achieved for the high selectivity and the wide stopband because of the tunable amount of coupling capacitance and inductance. The center frequency of the proposed BPF is 5.8 GHz, with a 3 dB fraction bandwidth of 8.9%. The measured insertion and return losses are 1.75 and 28.18 dB, respectively. A compact size and second harmonic frequency suppression can be obtained by the proposed BPF with S-L couplings.

Design of a Dual-Mode Balun Bandpass Filter With High Selectivity

2018 ◽  
Vol 28 (1) ◽  
pp. 22-24 ◽  
Author(s):  
Haiyan Xu ◽  
Jianpeng Wang ◽  
Lei Zhu ◽  
Feng Huang ◽  
Wen Wu
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Dual Mode
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