CMS - Filter & Coupling Matrix Synthesis Software

  • A tool tailored for filter engineers and system designers

  • Gives an exact overview of main filter parameters in seconds 
    without complex circuit  models and modeling

 
 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 furthermore allows placement of complex transmission zeroes, which opens up for group delay shaping.

The software gives a fast and accurate overview of

  • Insertion loss

  • Isolation

  • Group delay

  • Phase

  • Coupling coefficients

versus 

  • Filter order

  • Return loss

  • Resonator unloaded Q

  • Transmission zero positions

  • Topology

The CMS tool gives fast answers to questions like:

  • Which filter order is needed?

  • What will the losses be?

  • How many transmission zeroes are needed?

  • Where should the zeroes be located?

  • Can this topology implement this filter characteristic?

  • What must minimum unloaded Q be in this filter?

  • How much will the transmission zero increase group delay?

  • In my measurements an extra transmission zero has appeared - where did it come from?

  • Which coupling paths are needed for group delay flattening?

  • etc.


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

The software is very 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 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
   

“My PhD students have been using GWT's coupling matrix software for the design of  Asymmetric   Band pass Filters. The ability to place arbitrary poles has been extremely useful.”

Ian Hunter
 Professor and Director of Research
School of Electronic and Electrical Engineering
University of Leeds
UK
 

“The CMS filter software from Guided Wave Technology has become an invaluable tool in our  filter development. Due to its intuitive and simple user interface the task of simulating and predicting filter performances is no longer restricted to a few specialists in our organization.

The speed and accuracy of this tool allows us to investigate more filter topologies than ever,  thereby assuring that the best filter solution is always found for a given problem.
A highly recommendable tool”

Kristian Lotz
Group Leader, Filters & Combiners
Combilent A/S
 
  Some of our recent customers:

 
 
The 'engine' in the software is based on the Coupling Matrix Synthesis Tool, which is available online at this site and which has been used by thousands of engineers and students for years, which means that the software is based on well proven and tested principles.
 
Main features:

filter orders up to 12

arbitrary placement of transmission zeroes

complex transmission zeroes - e.g. group delay shaping and analysis

extended parameter plotting options - e.g. mag/ phases of S11 and S21, group delay, table listing

s-parameter file (s2p) generation e.g. as input in system simulator

topology matrix definition of filter circuits - no topology limitations

advanced graph and marker functions - e.g. marker lines & mouse courser read-out

easily re-scalable axes

excellent overview - input and output parameters are viewed at the same time

saving and loading of designs

fast response

integrated manual

intuitive and very user friendly interface
To find out more about the CMS software - take a look in the manual here.

Download a trial version locked to filter order 5 - but otherwise with full functionality (5.5 MB).

Current SW: Ver 1.1

OS requirements: Windows 2000/NT/XP/Vista*
Java must be installed on your system
 

* Verify on your PC that the Demo version runs satisfactorily before purchasing the full version
  On Viata you may have to run the program as Administrator (right click on CMS icon).
The full version of the CMS software supports filter orders up to 12 and will be locked to the hardware on your PC.
 
A single user license for the CMS tool costs US$ 995.-
Quantum discount available for purchases above 5 licenses - Contact GWT for rates.
If you decide to purchase the full version - use the button below and follow instructions. After having paid (PayPal) you will receive an E-mail with a link for downloading the software.
If you do not want to use PayPal please contact us and we will arrange for a bank transfer. 
 
The first time the software is used after installation you will have to activate it through a 'one-click' procedure. Within 24 hours after activation a license file will be forwarded to you. The license file must be placed in the installation directory.