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

The CMS software allows placement of complextransmission 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, IndiaAnalog Devices, USAAnatech Electronics, USAWainwright Instruments GmbH, GermanyAlga Microwave, CanadaK&L Microwave, USARF Com, Czech RepublicSchool of Information and Electronics, Xi'an ChinaOptisys LLC, USAKyocera Corporation, Japan Assurance Technology Corporation, USACorry Micronics, USANational Changhua Univ. of Education, TaiwanMtronPTI, USA NEC, JapanKorea Aerospace Research Institute KARI, KoreaMicrodata Telecom Innovation MTI, FinlandMilitary Research Institute VVU, Czech RepublicNippon Antenna, JapanweBoost, USAFingu Electronic Technology, SwedenThales, SwitzerlandWUHAN LH TECHNOLOGY, ChinaAndhra Electronics, IndiaRCD Radiokomunikace, Czech RepublicDielectric, USATRAK/Lorch Microwave, USAAKMETRON, RussiaBird Technologies, USAAmphenol Antenna Solutions, USANuWaves Engineering, USANizhny Novgorod State University, RussiaCreo Filters Oy, FinlandRF Microtec, ItalyUniversidad de Sevilla, SpainBTI Wireless, USAAnsys, USANokia Siemens Networks, USAMaTec Inc, USAVikram Sarabhai Space Centre, IndiaCambridge RF Systems, UKTagara Corp, JapanHeriot Watt University, UKSinclair Technologies, USACOM DEV, USAKMW, KoreaFlextronics, USAWestell, USAAlcatel-Lucent, IrelandAMTI Microwave Circuits, USAAnaren Microwave, USATelwave, KoreaAselsan, TurkeyKathrein-Werke, GermanyPrinceton Microwave Technology, USAUniversity of Oklahoma, USASyntronic, SwedenLucix, USAAeroAntenna Technology, USALark Engineering, USAKoreanSoft, South KoreaMitsubishi, JapanUniversity of Perugia, ItalyAlcatel Lucent, USAL-3Com, USATamagawa Electronics Co, JapanMicrodata Telecom Innovation AB, SwedenGeneral Dynamics Satcom Technologies, USABird Electronic Corp, USAMirad Microwave AG, SwitzerlandNuvotronics, USAPurdue University, USAPowerwave, FinlandNihon Dengyo Co, JapanRadis, RussiaApollo Microwave, CanadaInstitute for Infocomm Research, SingaporeHypersonic Technical Service, VietnamActive Spectrum, USAMEMtronics Corp, USAJohns Hopkins University/APL, USARYMSA, SpainVedang Radio Technology, IndiaEvolution Telecommunications Technology, UKKyungpook National University, South KoreaTransbit Sp, PolandIndiana Microelectronics, USAeBusiness, IsraeldbSpectra, USANokia Siemens Networks, FinlandMtronPTI, USACommercial Microwave Technology (CMT), USAElectronics Research, USABern University of Applied Sciences, SwitzerlandCobham Satcom Cape Town, South AfricaEmhiser Research, USAMatti Innovation, SwedenAxell Wireless, UKLinkra, ItalyBonn Hungary Electronics, HungaryNaval Research Laboratory, USAPrism Microwave, FinlandMotorola, USATriasx Pty, AustraliaInnovative RF, DenmarkHuawei Technologies, SwedenKathrein, FranceProcom, DenmarkEricsson, SwedenMESL Microwave, UKEuropean Space Agency, ESTEC, The NetherlandsMyat, USADelta Sigma Solutions, USAC-Com/Andrew, Czech RepublicSpace Engineering, ItalyNanjing Saigew Microwave Co., ChinaThrane & Thrane, DenmarkJampro Antennas, USAAerial Facilities, UKUniversity of Leeds, UKCombilent, 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.