Compact high‐selectivity tunable dual‐mode filter with constant bandwidth by adopting frequency‐dependent S‐L coupling

2019 ◽  
Vol 62 (1) ◽  
pp. 108-111 ◽  
Author(s):  
Jia‐Ming Zhu ◽  
Yi‐Fan Xue ◽  
Liang Sun ◽  
Fei Liu ◽  
Hon‐Wei Deng
Keyword(s):  
High Selectivity ◽  
Dual Mode ◽  
Frequency Dependent ◽  
Constant Bandwidth

Compact and high selectivity dual‐mode microstrip BPF with frequency‐dependent source–load coupling

2018 ◽  
Vol 54 (4) ◽  
pp. 219-221 ◽  
Author(s):  
Hong‐Wei Deng ◽  
Fei Liu ◽  
Tao Xu ◽  
Liang Sun ◽  
Yi‐Fan Xue
Keyword(s):  
High Selectivity ◽  
Dual Mode ◽  
Frequency Dependent

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

Two-Photon Fluorescence and MR Bio-imaging of Endogenous H2O2 in Tumor Microenvironment by a Dual-Mode Nanoprobe

2021 ◽  
Author(s):  
Hongmei Zhong ◽  
Shengrong Yu ◽  
Bingqian Li ◽  
Kangdi He ◽  
Dian Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Tumor Microenvironment ◽  
Mr Imaging ◽  
High Selectivity ◽  
Carbon Quantum Dots ◽  
Dual Mode ◽  
Two Photon ◽  
Bio Imaging ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence

Dual-mode bio-imaging nanoprobe TP-CQDs@MnO2, based two-photon carbon quantum dots and MnO2, has been developed for two-photon fluorescence and MR imaging of endogenous H2O2 in tumor microenvironment, which achieved high selectivity,...

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.

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