A HYBRID COMPUTER-AIDED TUNING METHOD FOR MICROWAVE FILTERS

A hybrid tuning method for microwave filters is presented in this paper. This novel tuning technique is based on the combination of the Cauchy method and aggressive space mapping (ASM) technique. Cauchy method is applied to determine the characteristic polynomials of the filter’s response, then the parameters (coupling matrix) of the low-pass prototype is extracted from the characteristic polynomials. The aggressive space mapping is used to optimized the fine model to guarantee that each step of a tuning is always in the right direction. The validity is verified by two examples. One deals with the fourresonator cross-coupled filter and the other one is an direct coupled six-resonator filter.

[1]  Tzyy-Sheng Horng,et al.  VERY MINIATURE DUAL-BAND AND DUAL-MODE BANDPASS FILTER DESIGNS ON AN INTEGRATED PASSIVE DEVICE CHIP , 2011 .

[2]  J. Michalski.  On Linear Mapping of Filter Characteristic to Position of Tuning Elements in Filter Tuning Algorithm , 2012 .

[3]  K. Xiao,et al.  COUPLING MATRIX DECOMPOSITION IN DESIGNS AND APPLICATIONS OF MICROWAVE FILTERS , 2011 .

[4]  S. Wu,et al.  MINIATURIZATION DESIGN OF FULL DIFFERENTIAL BANDPASS FILTER WITH COUPLED RESONATORS USING EMBEDDED PASSIVE DEVICE TECHNOLOGY , 2011 .

[5]  Jacek Gulgowski,et al.  The Analytic Extraction of the Complex-Valued Coupling Matrix and its Application in the Microwave Filter Modeling , 2012 .

[6]  Majid Tayarani,et al.  Active Learning Method for the Determination of Coupling Factor and External Q in Microstrip Filter Design , 2011 .

[7]  R. Cameron.  Advanced coupling matrix synthesis techniques for microwave filters , 2003 .

[8]  Ru‐Yuan Yang,et al.  DESIGN AND FABRICATION OF A QUAD-BAND BANDPASS FILTER USING MULTI-LAYERED SIR STRUCTURE , 2011 .

[9]  Qingxu Xiong,et al.  Design of Planar Dual and Triple Narrow-Band Bandstop Filters with Independently Controlled Stopbands and Improved Spurious Response , 2012 .

[10]  Kawthar A. Zaki,et al.  Computer-aided diagnosis and tuning of cascaded coupled resonators filters , 2002 .

[11]  THE DESIGN AND FABRICATION OF A HIGHLY COM- PACT MICROSTRIP DUAL-BAND BANDPASS FILTER , 2011 .

[12]  Jerzy Julian Michalski.  ARTIFICIAL NEURAL NETWORKS APPROACH IN MICROWAVE FILTER TUNING , 2010 .

[14]  Lukasz Szydlowski,et al.  ZERO-POLE APPROACH TO COMPUTER AIDED DESIGN OF IN-LINE SIW FILTERS WITH TRANSMISSION ZEROS , 2012 .

[15]  S. H. Chen,et al.  Electromagnetic optimization exploiting aggressive space mapping , 1995 .

[16]  Jerzy Julian Michalski.  INVERSE MODELING IN APPLICATION FOR SEQUENTIAL FILTER TUNING , 2011 .

[17]  Meng Meng,et al.  An Analytical Approach to Computer-Aided Diagnosis and Tuning of Lossy Microwave Coupled Resonator Filters , 2009, IEEE Transactions on Microwave Theory and Techniques.

[18]  L. Accatino.  Computer-Aided Tuning of Microwave Filters , 1986, 1986 IEEE MTT-S International Microwave Symposium Digest.

[19]  Jun Xu,et al.  Extracting Coupling Matrix and Unloaded Q from Scattering Parameters of Lossy Filters , 2011 .

[20]  M. S. Palma,et al.  Generation of accurate rational models of lossy systems using the Cauchy method , 2004, IEEE Microwave and Wireless Components Letters.

[21]  H. Chaloupka,et al.  Sequential tuning of microwave filters using adaptive models and parameter extraction , 2005, IEEE Transactions on Microwave Theory and Techniques.

[22]  Giuseppe Macchiarella,et al.  Extraction of Unloaded Q and Coupling Matrix From Measurements on Filters With Large Losses , 2010, IEEE Microwave and Wireless Components Letters.

[24]  G. Macchiarella,et al.  A formulation of the Cauchy method suitable for the synthesis of lossless circuit models of microwave filters from lossy measurements , 2006, IEEE Microwave and Wireless Components Letters.

[25]  Heng-Tung Hsu,et al.  Parameter extraction for symmetric coupled-resonator filters , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[26]  Tomasz Kacmajor,et al.  Filter Tuning Based on Linear Decomposition of Scattering Characteristics , 2013 .

[27]  S. Safavi-Naeini,et al.  Computer diagnosis and tuning of RF and microwave filters using model-based parameter estimation , 2002 .