Meaning of resonator's coupling coefficient in bandpass filter design

2006 ◽  
Vol 89 (6) ◽  
pp. 1-7 ◽  
Author(s):  
Ikuo Awai
Keyword(s):  
Coupling Coefficient ◽  
Bandpass Filter ◽  
Filter Design

Bandpass Filter Design using the Square Loop Resonator on 3 GHz Frequency for Radar Applications

2020 ◽  
Author(s):  
Lukman Medriavin Silalahi ◽  
Setiyo Budiyanto ◽  
Imelda Uli Vistalina Simanjuntak ◽  
Freddy Artadima Silaban ◽  
Nofal Gusti Sulissetyo ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Filter Design ◽  
Radar Applications

New dual-band bandpass filter design based on slotted ground structures

2011 ◽  
Vol 53 (7) ◽  
pp. 1505-1511
Author(s):  
Xiao-Hua Wang ◽  
Quan Xue ◽  
Kim Fung Man
Keyword(s):  
Bandpass Filter ◽  
Filter Design ◽  
Dual Band ◽  
Ground Structures

A new DGS resonator and its application to bandpass filter design

2004 ◽  
Author(s):  
Jang-Sik Yoon ◽  
Jun-Goo Kim ◽  
Jun-Seok Park ◽  
Choen-Seok Park ◽  
Jae-Bong Lim ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Filter Design

Compact dual-mode microstrip bandpass filter based on slotted square patch resonator

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Karthie S. ◽  
Zuvairiya Parveen J. ◽  
Yogeshwari D. ◽  
Venkadeshwari E.
Keyword(s):  
Bandpass Filter ◽  
Filter Design ◽  
Center Frequency ◽  
Dual Mode ◽  
Content Type ◽  
Transmission Zeros ◽  
Compact Size ◽  
Mode Response ◽  
Better Than ◽  
Good Agreement

Purpose The purpose of this paper is to present the design of a compact microstrip bandpass filter (BPF) in dual-mode configuration loaded with cross-loop and square ring slots on a square patch resonator for C-band applications. Design/methodology/approach In the proposed design, the dual-mode response for the filter is realized with two transmission zeros (TZs) by the insertion of a perturbation element at the diagonal corner of the square patch resonator with orthogonal feed lines. Such TZs at the edges of the passband result in better selectivity for the proposed BPF. Moreover, the cross-loop and square ring slots are etched on a square patch resonator to obtain a miniaturized BPF. Findings The proposed dual-mode microstrip filter fabricated in RT/duroid 6010 substrate using PCB technology has a measured minimum insertion loss of 1.8 dB and return loss better than 24.5 dB with a fractional bandwidth (FBW) of 6.9%. A compact size of 7.35 × 7.35 mm2 is achieved for the slotted patch resonator-based dual-mode BPF at the center frequency of 4.76 GHz. As compared with the conventional square patch resonator, a size reduction of 61% is achieved with the proposed slotted design. The feasibility of the filter design is confirmed by the good agreement between the measured and simulated responses. The performance of the proposed filter structure is compared with other dual-mode filter works. Originality/value In the proposed work, a compact dual-mode BPF is reported with slotted structures. The conventional square patch resonator is deployed with cross-loop and square ring slots to design a dual-mode filter with a square perturbation element at its diagonal corner. The proposed filter exhibits compact size and favorable performance compared to other dual-mode filter works reported in literature. The aforementioned design of the dual-mode BPF at 4.76 GHz is suitable for applications in the lower part of the C-band.

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