Inline Microwave Filters With N+1 Transmission Zeros Generated by Frequency-Variant Couplings: Coupling-Matrix-Based Synthesis and Design

2021 ◽  
pp. 1-1
Author(s):  
Martyna Mul ◽  
Maciej Jasinski ◽  
Adam Lamecki ◽  
Roberto Gomez-Garcia ◽  
Michal Mrozowski
Keyword(s):  
Microwave Filters ◽  
Coupling Matrix ◽  
Transmission Zeros

scholarly journals Coupling matrix synthesis of general chebyshev filters

2020 ◽  
Vol 309 ◽  
pp. 01011
Author(s):  
Lihua Qi ◽  
Dongqiu Xing ◽  
Rui Wang ◽  
Xinshe Qi ◽  
Jing Zhao
Keyword(s):  
Global Minimum ◽  
Microwave Filters ◽  
Hybrid Optimization ◽  
Final Solution ◽  
Matrix Synthesis ◽  
Excellent Performance ◽  
Coupling Matrix ◽  
Hybrid Optimization Algorithms ◽  
Chebyshev Filters ◽  
The Cost

A single optimization algorithm based on SolvOpt that synthesizes coupling matrices for cross-coupled microwave filters is presented. The rules for setting initial values of SolvOpt are proposed to find global minimum of the cost function. SolvOpt method provides faster convergence and higher accuracy to find the final solution compared with hybrid optimization algorithms. Application examples illustrate the excellent performance and the validity of this method.

scholarly journals Fully reconfigurable hexagonal-shaped comb-line filterplatform for prototyping and education purposes

2019 ◽  
Vol 12 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Daniel Miek ◽  
Michael Höft
Keyword(s):  
Bandpass Filter ◽  
Cross Coupling ◽  
Input Output ◽  
Coupling Matrix ◽  
Transmission Zeros ◽  
Outer Conductor ◽  
Different Types ◽  
Set Up

AbstractIn this paper, a completely reconfigurable comb-line bandpass filter is presented. Due to the modularity, different standard coupling matrix topologies like the folded form, cascaded triplets, and the cul-de-sac form can be implemented and tested. Circuit-based coupling matrices like the extracted pole topology can easily be realized as well. Different types of input-/output- and cross-couplings can be examined before fabrication of a fixed filter set-up takes place. Furthermore, the proposed filter platform can be used to construct a diplexer. By using different heights of the inner and outer conductor of the coaxial resonators, arbitrary center frequencies in the range between 1 and 4 GHz can be realized. Various types of input couplings are available and proposed here to achieve bandwidths between 10 and 110 MHz. A variety of cross-coupling apertures able to realize transmission zeros are presented as well.

Coupling matrix synthesis of dissipative microwave filters

2011 ◽  
Vol 5 (8) ◽  
pp. 895 ◽  
Author(s):  
D. Navarro-Tapia ◽  
E. Sorolla ◽  
P. Otero ◽  
M. Mattes
Keyword(s):  
Microwave Filters ◽  
Matrix Synthesis ◽  
Coupling Matrix
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