Multi-mode wideband bandpass filters using waveguide cavities (invited)

2015 ◽  
Author(s):  
Sai-Wai Wong ◽  
Shi-Fen Feng ◽  
Lei Zhu
Keyword(s):  
Bandpass Filters ◽  
Waveguide Cavities ◽  
Multi Mode

scholarly journals Synthesis of multi-band bandpass filters using semi-hidden multi-mode coupling elements

2017 ◽  
Vol 14 (4) ◽  
pp. 20161259-20161259
Author(s):  
Shuai Jiang ◽  
Yun Liu ◽  
Yao Chen ◽  
Shuang Zhu ◽  
Ji Ding ◽  
...  
Keyword(s):  
Mode Coupling ◽  
Bandpass Filters ◽  
Multi Mode ◽  
Multi Band

High‐selectivity wideband balanced bandpass filters using symmetrical multi‐mode resonators

2013 ◽  
Vol 7 (12) ◽  
pp. 1005-1015 ◽  
Author(s):  
Wenjie Feng ◽  
Wenquan Che ◽  
Liming Gu ◽  
Quan Xue
Keyword(s):  
High Selectivity ◽  
Bandpass Filters ◽  
Multi Mode

Quasi-elliptic evanescent-mode filters using non-resonating mode waveguide cavities

2015 ◽  
Vol 7 (3-4) ◽  
pp. 211-218 ◽  
Author(s):  
Simone Bastioli ◽  
Richard V. Snyder
Keyword(s):  
Insertion Loss ◽  
Bandpass Filters ◽  
Experimental Results ◽  
The Other ◽  
Q Factor ◽  
Evanescent Mode ◽  
High Q ◽  
Transmission Zeros ◽  
Waveguide Cavities ◽  
A New Technique

A new technique to realize quasi-elliptic bandpass filters with extreme close-in rejection is presented in this paper. The basic idea consists of embedding non-resonating mode waveguide cavities within the structure of an evanescent-mode filter. Such a combination of cavities and resonators allows the generation of very close transmission zeros while realizing at the same time relatively wide passbands and stopbands. Both H-plane TE201 mode and E-plane TM110 mode configurations are used as non-resonating mode waveguide cavities. In contrast with the other elliptic evanescent-mode filters using conventional approaches, the insertion loss degradation at the filter cut-off frequencies is minimized thanks to the high-Q factor of the waveguide cavities, whose corresponding poles are located right at the edges of the passband. The experimental results of an evanescent-mode filter having 9.950–11.000 GHz passband and providing more than 45 dB rejection between 11.040 and 11.050 GHz validate the proposed solution.

scholarly journals Bandpass filters using multi‐mode square ring resonators

2018 ◽  
Vol 12 (10) ◽  
pp. 1656-1665 ◽  
Author(s):  
Jinli Zhang ◽  
Ming He ◽  
Haihua Chen ◽  
Doudou Pang ◽  
Lu Ji ◽  
...  
Keyword(s):  
Bandpass Filters ◽  
Ring Resonators ◽  
Multi Mode

scholarly journals Analysis of multi-mode waveguide cavities containing free space gaps for use in future far-infrared telescopes

2020 ◽  
Vol 105 ◽  
pp. 103235
Author(s):  
Darragh McCarthy ◽  
Neil Trappe ◽  
Stephen Doherty ◽  
J. Anthony Murphy ◽  
Marcin Gradziel ◽  
...  
Keyword(s):  
Free Space ◽  
Far Infrared ◽  
Waveguide Cavities ◽  
Multi Mode ◽  
Infrared Telescopes

Miniaturized Tri-Band Bandpass Filters Based on Multi-Mode Resonators with Pseudo-Interdigital Structure

2015 ◽  
Vol 35 (7) ◽  
pp. 488-497 ◽  
Author(s):  
Qun Li ◽  
Yonghong Zhang ◽  
Daotong Li ◽  
Joshua L.-W. Li
Keyword(s):  
Bandpass Filters ◽  
Multi Mode

Ultra-Wideband (UWB) Bandpass Filter Using Multi-Mode SIR

2013 ◽  
Vol 760-762 ◽  
pp. 241-245
Author(s):  
Jian Kang Xiao ◽  
Wu Zhu ◽  
Yong Li ◽  
Wei Zhao
Keyword(s):  
Return Loss ◽  
Bandpass Filter ◽  
Bandpass Filters ◽  
Ultra Wideband ◽  
Input And Output ◽  
Quarter Wavelength ◽  
Coupled Lines ◽  
Multi Mode ◽  
Multiple Transmission

New ultra-wideband (UWB) bandpass filters are proposed by using stepped-impendence resonators (SIRs) and stub-loaded SIRs, aiming at transmitting the signals in the whole UWB passband of 3.1GHz-10.6GHz. Each of the proposed UWB filters consists of two parallel but oppositely arranged compact SIR with tri or quad-section or stub-loaded SIR. In the design, the first two or three resonances of the proposed resonators are properly adjusted to be placed within the UWB. In order to enhance the coupling degree, pairs of quarter-wavelength parallel-coupled lines are longitudinally stretched in both the input and output sides. The UWB bandpass filters behave multiple transmission poles and good return loss of no less than 15dB. A proposed UWB filter is fabricated and measured, and the experiment demonstrates the design.

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