scholarly journals Bandwidth and Center Frequency Reconfigurable Waveguide Filter Based on Liquid Crystal Technology

2021 ◽  
pp. 1-11
Author(s):  
Fynn Kamrath ◽  
Ersin Polat ◽  
Stipo Matic ◽  
Christian Schuster ◽  
Daniel Miek ◽  
...  
2006 ◽  
Author(s):  
C. Volkmann ◽  
S. Lai ◽  
D. Most ◽  
L. Zakrzewski ◽  
D. Hansmann ◽  
...  

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Ziqiang Xu ◽  
Gen Zhang ◽  
Hong Xia ◽  
Meijuan Xu

Hexagonal dual-mode cavity and its application to substrate integrated waveguide (SIW) filter are presented. The hexagonal SIW resonator which can combine flexibility of rectangular cavity and performance of circular cavity is convenient for dual-mode bandpass filters design. By introducing coupling between source and load, the filter not only has good selectivity due to two controllable transmission zeros, but also has a small size by the virtue of its single-cavity structure. A demonstration filter with a center frequency of 10 GHz and a 3 dB fractional bandwidth of 4% is designed and fabricated to validate the proposed structure. Measured results are in good agreement with simulated ones.


Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 716 ◽  
Author(s):  
Holger Maune

Information and communication technologies (ICT) are the foundation of growth and development in the modern global economy [...]


Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 101 ◽  
Author(s):  
Mahmoud AbuHussain ◽  
Ugur C. Hasar

This paper presents a new design of a fifth order bandpass waveguide filter with Chebyshev response which operates in the X-band at 10 GHz center frequency. By using a complementary split ring resonator (CSRR) upper and lower sections that are placed on the same transverse plane and are not on the same parallel line, CSRR sections are shifted from each other. A simple model of lumped elements RLC is introduced and calculated as well. The model of the proposed bandpass waveguide filter is synthesized and designed by using computer simulation technology (CST). Hereafter, by selecting proper physical parameters and optimizing the overall CSRR geometrical dimensions by taking into consideration the coupling effect between resonators, a shortened length of the overall filter, and a wider bandwidth over the conventional one are obtained. As a result, the proposed filter is compared with the conventional bandpass waveguide filter that is coupled by inductive irises with Chebyshev response, in addition to other studies that have used the metamaterial technique. The proposed filter reduces the overall physical length by 31 % and enhances the bandwidth up to 37.5 % .


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