Calabazas Creek Research, Inc. | CASCADE

Overview
Feature List
Current Users
Price
Download Cascade Web Version 3.0 (Free 30-day Trial)
Overview
Cascade is a scattering matrix program for the design of microwave and millimeter wave circuits and components. Scattering matrix analysis revolutionized the design of overmoded gyrotron circuits and is now used for designing waveguide components, including pillbox and coaxial windows, mode converters, tapers, and transitions.

Scattering matrix codes generate the scattering matrix by calculating the coupling coefficients between transitions, including the effects of dielectrics. The input is simple, and the analysis typically takes only a few minutes. The accuracy typically exceeds that obtained with mesh type codes, such as HFSS and Eminence, and requires a fraction of the time to obtain a solution. The analysis can also find and identify trapped resonances generated by ghost or trapped modes.

The code will facilitate development of waveguide and circuit components consisting of circular, coaxial, or rectangular waveguide sections. A user-friendly, intuitive, graphical user interface facilitates user input and post processing with material properties for several standard ceramics built into the user interface. Output includes the complete mode composition throughout the problem domain. This allows the determination of the scattering matrix parameters, electric field profiles, resonant frequencies and Qs, VSWRs, electric field gradients, mode content, and ohmic loss.

Other features were recently incorporated. The code can be used to design smooth wall mode converters and tapers. Scattering parameters can be entered from other programs, such as Ansoft Corporation's High Frequency Structure Simulator, to allow waveguide system design incorporating components requiring 3D finite element analysis. In addition, scattering parameters can be entered from experimental measurements and the waveguide components optimized for specific types of performance. Several optimization routines are built into the program, and others can be easily linked in by users.

The basic engine for Cascade was funded by the Vacuum Electronics Division of the Naval Research Laboratory and is available to the microwave tube community. Some of the current development is funded by the U.S. Department of Energy through SBIR Grant number DE-FG03-97ER82343.

Features List
Cascade v3.0 includes the following features:

Analysis of rectangular, circular or coax waveguide sections (in any order)
Full optimization capability
Statistical tolerancing analysis
Import of external scattering matrices (HFSS, measured)
Linear/cubic spline interpolation of arbitrary shapes
Cubic spline optimization
Dielectric medium, finite conductivity
Alternative mode sets for ghost mode

Research is on going to add additional capabilities.

Current Users

Communication Power Industries (CPI)
Litton
Teledyne
Raytheon
NASA
Jet Propulsion Laboratory (JPL)
Naval Research Laboratory (NRL)
MDS
TMD (formerly Thorn EMI)
Northrop Grumman

Price
$6000 per copy.
Contact Dr. Lawrence Ives



CCR
			Overview Feature List Current Users Price Download Cascade Web Version 3.0 (Free 30-day Trial) Overview Cascade is a scattering matrix program for the design of microwave and millimeter wave circuits and components. Scattering matrix analysis revolutionized the design of overmoded gyrotron circuits and is now used for designing waveguide components, including pillbox and coaxial windows, mode converters, tapers, and transitions. Scattering matrix codes generate the scattering matrix by calculating the coupling coefficients between transitions, including the effects of dielectrics. The input is simple, and the analysis typically takes only a few minutes. The accuracy typically exceeds that obtained with mesh type codes, such as HFSS and Eminence, and requires a fraction of the time to obtain a solution. The analysis can also find and identify trapped resonances generated by ghost or trapped modes. The code will facilitate development of waveguide and circuit components consisting of circular, coaxial, or rectangular waveguide sections. A user-friendly, intuitive, graphical user interface facilitates user input and post processing with material properties for several standard ceramics built into the user interface. Output includes the complete mode composition throughout the problem domain. This allows the determination of the scattering matrix parameters, electric field profiles, resonant frequencies and Qs, VSWRs, electric field gradients, mode content, and ohmic loss. Other features were recently incorporated. The code can be used to design smooth wall mode converters and tapers. Scattering parameters can be entered from other programs, such as Ansoft Corporation's High Frequency Structure Simulator, to allow waveguide system design incorporating components requiring 3D finite element analysis. In addition, scattering parameters can be entered from experimental measurements and the waveguide components optimized for specific types of performance. Several optimization routines are built into the program, and others can be easily linked in by users. The basic engine for Cascade was funded by the Vacuum Electronics Division of the Naval Research Laboratory and is available to the microwave tube community. Some of the current development is funded by the U.S. Department of Energy through SBIR Grant number DE-FG03-97ER82343. Features List Cascade v3.0 includes the following features: Analysis of rectangular, circular or coax waveguide sections (in any order) Full optimization capability Statistical tolerancing analysis Import of external scattering matrices (HFSS, measured) Linear/cubic spline interpolation of arbitrary shapes Cubic spline optimization Dielectric medium, finite conductivity Alternative mode sets for ghost mode Research is on going to add additional capabilities. Current Users Communication Power Industries (CPI) Litton Teledyne Raytheon NASA Jet Propulsion Laboratory (JPL) Naval Research Laboratory (NRL) MDS TMD (formerly Thorn EMI) Northrop Grumman Price $6000 per copy. Contact Dr. Lawrence Ives Download Cascade v 3.0 (Free 30-day Trial): Download Cascade Web Version 3.0 Download User Manual for Cascade Web Version 3.0 Download Cascade 3.0 Latest Patch (after installing the full Web Version 3.0) Download Cascade 3.0 Latest Patch Installation Instruction
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