Narrow-slot bandpass filter based on folded substrate-integrated waveguide with wide out-of-band rejection

2008 ◽  
Vol 50 (5) ◽  
pp. 1155-1159 ◽  
Author(s):  
Wang Lei ◽  
Wenquan Che ◽  
Kuan Deng ◽  
Shiwei Dong
2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Peng Zheng ◽  
Zhifu Liu ◽  
Mingsheng Ma ◽  
Yi Wang ◽  
Feng Liu ◽  
...  

A Ka-band substrate integrated waveguide bandpass filter has been designed and fabricated using low temperature co-fired ceramic (LTCC) technology. The in-house developed SICCAS-K5F3 material with a permittivity of 6.2 and a loss tangent of 0.002 was used. The size and surface area of the proposed bandpass filter are reduced by exploiting vertical coupling in vertically laminated three-dimensional structures. The coupling between adjacent cavities is realized by a narrow slot. A vertical transition structure between the coplanar-waveguide feed line and the substrate integrated waveguide is adopted to facilitate the internal signal connection. The demonstrated third-order filter has a compact size of 6.79 mm×4.13 mm×1.34 mm (0.63λ0  × 0.38λ0  × 0.12λ0) and exhibits good performance with a low insertion loss of 1.74 dB at 27.73 GHz and a 3 dB fractional bandwidth of 10 %.


2017 ◽  
Vol 59 (4) ◽  
pp. 934-937 ◽  
Author(s):  
Qiao-Li Zhang ◽  
Sulav Adhikari ◽  
Bing-Zhong Wang ◽  
Ke Wu

2012 ◽  
Vol 26 (1) ◽  
pp. 140-147 ◽  
Author(s):  
X. Yang ◽  
Y. Fan ◽  
B. Zhang ◽  
X. Xu ◽  
H. Wang

2018 ◽  
Vol 12 (13) ◽  
pp. 2030-2033 ◽  
Author(s):  
Min‐Hua Ho ◽  
Cheng‐You Hou ◽  
Chung‐I G. Hsu ◽  
Keh‐Yi Lee

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