A High-Selectivity Tunable Dual-Band Bandpass Filter Using Stub-Loaded Stepped-Impedance Resonators

2014 ◽  
Vol 24 (11) ◽  
pp. 736-738 ◽  
Author(s):  
Bin You ◽  
Long Chen ◽  
Yaping Liang ◽  
Xuan Wen
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Dual Band

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.

DESIGN OF A MINIATURIZED DUAL-BAND BANDPASS FILTER WITH HIGH SELECTIVITY

2014 ◽  
Vol 50 ◽  
pp. 165-170 ◽  
Author(s):  
Xiao-Lei Ma ◽  
Yong-Lun Luo ◽  
Shuang-Lin Yuan ◽  
Long Chen
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Dual Band

scholarly journals Compact tunable dual-band bandpass filter with independently tunable passbands and high selectivity

2019 ◽  
Vol 16 (11) ◽  
pp. 20190237-20190237 ◽  
Author(s):  
Fan Zhang ◽  
Yi Wang ◽  
Yang Yu ◽  
Yang Gao ◽  
Yi Zhang ◽  
...  
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Dual Band

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 High Selectivity Dual-Band Bandpass Filter with Tunable Lower Passband

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Wei-Qiang Pan ◽  
Xiao-Lan Zhao ◽  
Yao Zhang ◽  
Jin-Xu Xu
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Bandpass Filters ◽  
Dual Band ◽  
Transmission Zeros ◽  
Resonant Modes ◽  
Novel Method ◽  
Good Agreement ◽  
Tunable Bandpass Filter

This paper presents a novel method to design dual-band bandpass filters with tunable lower passband and fixed upper passband. It utilizes a trimode resonator with three controllable resonant modes. Discriminating coupling is used to suppress the unwanted mode to avoid the interference. Varactors are utilized to realize tunable responses. The bandwidth of the two bands can be controlled individually. Transmission zeros are generated near the passband edges, resulting in high selectivity. For demonstration, a tunable bandpass filter is implemented. Good agreement between the prediction and measurement validates the proposed method.

High-selectivity dual-band bandpass filter using folded stepped-impedance resonators and asymmetric coupling lines

2012 ◽  
Vol 54 (8) ◽  
pp. 1866-1869 ◽  
Author(s):  
Wei Cheng ◽  
Xin-Huai Wang ◽  
Yong Tuo ◽  
Yan-Fu Bai ◽  
Xiao-Wei Shi
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Dual Band ◽  
Asymmetric Coupling
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