Planar microstrip UWB bandpass filter using U-shaped slot coupling structure

2006 ◽  
Vol 42 (25) ◽  
pp. 1461 ◽  
Author(s):  
G.M. Yang ◽  
R.H. Jin ◽  
J.P. Geng
Keyword(s):  
Bandpass Filter ◽  
Coupling Structure ◽  
Slot Coupling

Bandwidth Balancing Design of Miniaturized Tunable Coaxial Cavity Filter

2010 ◽  
Vol 40-41 ◽  
pp. 453-456
Author(s):  
Xin Hui Wu ◽  
Jing Li ◽  
Chang Hai Qin ◽  
Zhong Hai Zhang
Keyword(s):  
Insertion Loss ◽  
Bandpass Filter ◽  
Tunable Filter ◽  
Theoretic Analysis ◽  
High Quality ◽  
Coaxial Cavity ◽  
Coupling Structure ◽  
Novel Model

This paper proposes a method of the coupling modal, which is able to miniaturize the tunable cavity filter while keeping its bandwidth balancing. The filter consists of a tunable cavity dual-bandpass filter and a triangular twin-loop as its inter-cavities coupling structure. We analyzed and calculated the bandwidth of the filter changing with the size and position of the triangular twin-loop. To prove the advancement of the design, a tunable coaxial cavity dual-bandpass filter operating at 230MHz and 409MHz was fabricated and measured. The size is less then a half that of the conventional tunable filter with same specifications. The insertion loss is lower than 1.2dB at operating frequencies. And the bandwidth in lowband and highband are both more than 2.5MHz with the insertion loss less then 3dB. Experiment results and theoretic analysis agree well. This novel model can contribute to the miniaturization of RF and microwave systems with high quality.

Novel Four-Way Multilayer SIW Power Divider With Slot Coupling Structure

2015 ◽  
Vol 25 (12) ◽  
pp. 799-801 ◽  
Author(s):  
Guoliang Li ◽  
Kaijun Song ◽  
Fan Zhang ◽  
Yu Zhu
Keyword(s):  
Power Divider ◽  
Coupling Structure ◽  
Slot Coupling

Ultra-wideband bandpass filter using CPW-to-microstrip coupling structure

2006 ◽  
Vol 42 (10) ◽  
pp. 586 ◽  
Author(s):  
H.L. Hu ◽  
X.D. Huang ◽  
C.H. Cheng
Keyword(s):  
Bandpass Filter ◽  
Ultra Wideband ◽  
Coupling Structure

A Compact Quad-Band Bandpass Filter Based on Defected Microstrip Structure

Frequenz ◽  
2017 ◽  
Vol 71 (7-8) ◽  
Author(s):  
Lei Chen ◽  
Xiao Yan Li ◽  
Feng Wei
Keyword(s):  
Bandpass Filter ◽  
Band Pass Filter ◽  
Pass Filter ◽  
High Isolation ◽  
Transmission Zeros ◽  
Passive Devices ◽  
Coupling Structure ◽  
Band Pass ◽  
Microstrip Structure ◽  
Good Agreement

AbstractA compact quad-band band-pass filter (BPF) based on stub loaded resonators (SLRs) with defected microstrip structure (DMS) is analyzed and designed in this paper. The proposed resonator is created by embedding DMS into the SLR and can achieve four narrow passbands. By employing the pseudointerdigital coupling structure between the two resonators, transmission zeros among each passband are generated to improve the passband selectivity and a high isolation is achieved. In order to validate its practicability, a prototype of a quad-band BPF centred at 1.57, 2.5, 4.3 and 5.2 GHz is designed and fabricated. The proposed filter is more compact due to the slow-wave characteristic of DMS. The simulated and measured results are in good agreement with each other. In addition, the DMS idea can be extended to the design of other microstrip passive devices.

A WR-3 dual-band bandpass filter based on parallel coupling structure

2016 ◽  
Vol 23 (7) ◽  
pp. 2553-2559
Author(s):  
Yulin Huang ◽  
Xinyi Li ◽  
Jingfu Bao ◽  
Xinghai Zhao ◽  
Yingbin Zheng ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Coupling Structure
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