A New Resonant Coupling Structure for Inline Waveguide Filters with Transmission Zeros

2021 ◽  
Author(s):  
Cristiano Tomassoni ◽  
Giuseppe Macchiarella
Keyword(s):  
Resonant Coupling ◽  
Transmission Zeros ◽  
Coupling Structure ◽  
Waveguide Filters

Folded W-Band Waveguide Filters with Resonant Coupling Apertures for the Generation of Additional Transmission Zeros

Frequenz ◽  
2019 ◽  
Vol 73 (11-12) ◽  
pp. 379-388
Author(s):  
Daniel Miek ◽  
Ana Morán-López ◽  
Jorge A. Ruiz-Cruz ◽  
Michael Höft
Keyword(s):  
Fourth Order ◽  
Manufacturing Process ◽  
Filter Design ◽  
Resonant Coupling ◽  
Transmission Zeros ◽  
W Band ◽  
Waveguide Filters ◽  
Measurement Results ◽  
Realization Process ◽  
Good Agreement

Abstract In this paper the realization of multiple additional transmission zeros in folded W-band waveguide filters is discussed. The transmission zeros (TZs) can be placed symmetrically as well as asymmetrically in the near passband region of the filter and arise due to a resonant coupling between source and / or load. Third and fourth order filter set-ups are presented, showing in total between three and six TZs. These zeros can be used to improve the selectivity of the filter without increasing the overall order. The filter design and realization process is discussed. Subsequently, the measurement results are compared with simulation, showing good agreement. As the filters are designed for the W-band, the manufacturing process is connected with some difficulties which are addressed within this paper as well.

Design of Inline Waveguide Filters With Frequency-Variant Couplings Producing Transmission Zeros

2021 ◽  
pp. 1-1
Author(s):  
Giuseppe Macchiarella ◽  
Gian Guido Gentili ◽  
Nicolo Delmonte ◽  
Lorenzo Silvestri ◽  
Maurizio Bozzi
Keyword(s):  
Transmission Zeros ◽  
Waveguide Filters

Substrate-integrated waveguide cross-coupled filters with mixed electric and magnetic coupling structure

2018 ◽  
Vol 10 (8) ◽  
pp. 896-903 ◽  
Author(s):  
Amit Ranjan Azad ◽  
Dharmendra Kumar Jhariya ◽  
Akhilesh Mohan
Keyword(s):  
Printed Circuit Board ◽  
Single Layer ◽  
Magnetic Coupling ◽  
Frequency Selectivity ◽  
Circuit Board ◽  
Substrate Integrated Waveguide ◽  
Transmission Zeros ◽  
Coupling Structure ◽  
Board Process ◽  
Good Agreement

AbstractThis paper presents a substrate-integrated waveguide (SIW) mixed electric and magnetic coupling structure implemented on a single-layer substrate to create finite transmission zeros (TZs), which can be used to design microwave filters with higher frequency selectivity. Mixed coupling is realized by three slot-lines on the top metal plane combined with an iris-window between two adjacent SIW cavities. The electric and magnetic coupling can be separately controlled by adjusting the dimensions of the slot-lines and the width of the iris-window, and a controllable TZ below or above the passband can be produced. Furthermore, a detailed analysis of the mixed coupling structure is presented. To demonstrate the validity of the proposed structure, third- and fourth-order cross-coupled generalized Chebyshev bandpass filters are designed and fabricated using the standard printed circuit board process. The experimental results are in good agreement with the simulation results. The filters exhibit simple structure and good frequency selectivity.

scholarly journals Balanced substrate integrated waveguide filters with controllable finite transmission zeros

2020 ◽  
Vol 15 (1) ◽  
pp. 1-11
Author(s):  
Qing Liu ◽  
Na An ◽  
Zhongyang He ◽  
Dewei Zhang ◽  
Xian Wang ◽  
...  
Keyword(s):  
Substrate Integrated Waveguide ◽  
Transmission Zeros ◽  
Waveguide Filters

Partially Air-Filled Substrate Integrated Waveguide Filters With Full Control of Transmission Zeros

2019 ◽  
Vol 67 (9) ◽  
pp. 3673-3682 ◽  
Author(s):  
Lorenzo Silvestri ◽  
Anthony Ghiotto ◽  
Cristiano Tomassoni ◽  
Maurizio Bozzi ◽  
Luca Perregrini
Keyword(s):  
Substrate Integrated Waveguide ◽  
Transmission Zeros ◽  
Full Control ◽  
Waveguide Filters

scholarly journals A Novel Coupling Structure for Inline Realization of Cross-Coupled Rectangular Waveguide Filters

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 107527-107538
Author(s):  
Muhammad Latif ◽  
Giuseppe Macchiarella ◽  
Farooq Mukhtar
Keyword(s):  
Rectangular Waveguide ◽  
Coupling Structure ◽  
Waveguide Filters

A Balanced Dual-Band BPF with High CM Suppression and Improved Selectivity

Frequenz ◽  
2019 ◽  
Vol 73 (7-8) ◽  
pp. 261-265
Author(s):  
Feng Wei ◽  
Hao-Jie Yue ◽  
Xiao-Wei Shi
Keyword(s):  
Design Procedure ◽  
Ring Resonators ◽  
Dual Band ◽  
Design Strategies ◽  
Differential Mode ◽  
Split Ring ◽  
Transmission Zeros ◽  
Coupling Structure ◽  
Transition Structures ◽  
Good Agreement

Abstract In this paper, a balanced dual-band bandpass filter (BPF) is designed based on microstrip folded stepped impedance split ring resonators (SISRRs) and balanced microstrip/slotline transition structures. The center frequencies and the fractional bandwidths (FBWs) of the two differential-mode (DM) passbands can be tuned by changing the physical lengths of two SISRRs and the gaps between the two resonators, respectively. The balanced microstrip/slotline transition structures can achieve a wideband common-mode (CM) suppression. Moreover, the DM passbands are independent from the CM responses, which significantly simplifies the design procedure. In addition, due to 0-degree feed structure and cross coupling structure, more transmission zeros can be realized, which can improve the passbands selectivity greatly. In order to validate the design strategies, a balanced dual-band BPF centered at 2.47 GHz and 5.21 GHz was fabricated and a good agreement between the simulated and measured results is observed.

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