Guided Wave Technology's Coupling Matrix Synthesis (CMS) software facilitates synthesis of N+2 coupling matrices for Chebyshev band pass filtering functions, with arbitrary finite-position transmission zeroes.

The CMS software allows placement of complex transmission zeroes, which opens up for group delay shaping.

• zeroing of very weak couplings in order to see if they can be omitted in a physical filter

• change of coupling signs

• investigation of other N+2 coupling matrices e.g. in the literature

• analysis of where unintended couplings may arise from in a physical filter (often seen as extra notches or asymmetry in measured characteristics).

• sensitivity analysis of critical couplings

Below: Monte-Carlo analysis on coupling coefficients.
Same variation applied on three different topologies

The software gives a fast and accurate overview of

• Insertion loss

• Isolation

• Group delay

• Phase

• Coupling coefficients

• Stored energy per resonator

versus 

• Filter order

• Return loss

• Resonator unloaded Q

• Transmission zero positions

• Topology

Stored energy plots for each resonator is 'a must' for power handling analysis

CMS is intended for engineers, system designers, sales people, teachers, students and others who are engaged in design and analysis of microwave filters from both component and system point of views. 

The software is intuitive and simple to operate and requires only basic knowledge about filters and filter terms. 

The resonance characteristic of a single resonator in CMS is 100% symmetric and couplings are assumed constant versus frequency. The calculated characteristics are therefore most accurate for narrow band filters (< 10 %) with resonating elements which have symmetric characteristics.

Check out accuracy and utility with the following examples:
  

 Triplet dielectric resonator filter

 8 pole cross coupled combline filter

 Group delay shaping - introduction+advanced

 Topology investigation by Monte-Carlo Analysis

 Coupling Coefficient Signs - Change of

April 2010      

 Narrow-band Microwave Bandpass 
 Filter Design by Coupling Matrix Synthesis 

 The full MWJ article - original document

 Exporting Spice Netlist of CMS filter to circuit simulator

 X-couplings in filters - How do they work?

 Topology and Power Handling

September 2012

 Simplified Power Handling Analysis of
 Microwave Filters

 The full MWJ article - original document

July 2018

 Design of an Ultra-Wideband "Brick Wall" Filter

  Some customers:

 Sumeru Microwave Communications, India Analog Devices, USA Anatech Electronics, USA Wainwright Instruments GmbH, Germany Alga Microwave, Canada K&L Microwave, USA RF Com, Czech Republic School of Information and Electronics, China Optisys LLC, USA Kyocera Corporation, Japan Assurance Technology Corporation, USA Corry Micronics, USA National Changhua Univ. of Education, Taiwan MtronPTI, USA NEC, Japan Korea Aerospace Research Institute KARI, Korea Microdata Telecom Innovation MTI, Finland Military Research Institute VVU, Czech Republic Nippon Antenna, Japan weBoost, USA Fingu Electronic Technology, Sweden Thales, Switzerland WUHAN LH TECHNOLOGY, China Andhra Electronics, India RCD Radiokomunikace, Czech Republic Dielectric, USA TRAK/Lorch Microwave, USA AKMETRON, Russia Bird Technologies, USA Amphenol Antenna Solutions, USA NuWaves Engineering, USA Nizhny Novgorod State University, Russia Creo Filters Oy, Finland RF Microtec, Italy Universidad de Sevilla, Spain BTI Wireless, USA Ansys, USA Nokia Siemens Networks, USA MaTec Inc, USA Vikram Sarabhai Space Centre, India Cambridge RF Systems, UK Tagara Corp, Japan Heriot Watt University, UK Sinclair Technologies, USA COM DEV, USA KMW, Korea Flextronics, USA Westell, USA Alcatel-Lucent, Ireland AMTI Microwave Circuits, USA Anaren Microwave, USA Telwave, Korea Aselsan, Turkey Kathrein-Werke, Germany Princeton Microwave Technology, USA University of Oklahoma, USA Syntronic, Sweden Lucix, USA AeroAntenna Technology, USA Lark Engineering, USA KoreanSoft, South Korea Mitsubishi, Japan University of Perugia, Italy Alcatel Lucent, USA L-3Com, USA Tamagawa Electronics Co, Japan Microdata Telecom Innovation AB, Sweden General Dynamics Satcom Technologies, USA Bird Electronic Corp, USA Mirad Microwave AG, Switzerland Nuvotronics, USA Purdue University, USA Powerwave, Finland Nihon Dengyo Co, Japan Radis, Russia Apollo Microwave, Canada Institute for Infocomm Research, Singapore Hypersonic Technical Service, Vietnam Active Spectrum, USA MEMtronics Corp, USA Johns Hopkins University/APL, USA RYMSA, Spain Vedang Radio Technology, India Evolution Telecommunications Technology, UK Kyungpook National University, South Korea Transbit Sp, Poland Indiana Microelectronics, USA eBusiness, Israel dbSpectra, USA Nokia Siemens Networks, Finland MtronPTI, USA Commercial Microwave Technology (CMT), USA Electronics Research, USA Bern University of Applied Sciences, Switzerland Cobham Satcom Cape Town, South Africa Emhiser Research, USA Matti Innovation, Sweden Axell Wireless, UK Linkra, Italy Bonn Hungary Electronics, Hungary Naval Research Laboratory, USA Prism Microwave, Finland Motorola, USA Triasx Pty, Australia Innovative RF, Denmark Huawei Technologies, Sweden Kathrein, France Procom, Denmark Ericsson, Sweden MESL Microwave, UK European Space Agency, ESTEC, The Netherlands Myat, USA Delta Sigma Solutions, USA C-Com/Andrew, Czech Republic Space Engineering, Italy Thrane & Thrane, Denmark Jampro Antennas, USA University of Leeds, UK Combilent, Denmark

* Verify on your PC that the Demo version runs satisfactorily before purchasing the full version
  The program must be run as Administrator (right click on CMS icon).

Please contact us for purchasing instructions.