Guiding your waves

Guiding your waves

FEST3D (Full-Wave Electromagnetic Simulation Tool) is a software tool capable of

analysing complex passive microwave components based on waveguide technology

(such as multiplexers, couplers, filters…) in very short computational times with high

accuracy. This is achieved by the use of the most advanced algorithms based on

full-wave electromagnetic analysis methods.

FEST3D offers a user-friendly and intuitive interface. Circuits are easily created by

using predefined building blocks, avoiding complex drawings.

This suite offers all the capabilities needed for the design of passive components

such as optimization and tolerance analysis modules. Moreover, FEST3D advanced

synthesis tools allow designing bandpass, dual-mode and lowpass filters from user

specifications.

Furthermore, FEST3D is the first tool of its class that integrates high power analysis

in the design process. This results in an important reduction of the design life cycle

of critical components operating at high power levels.

DESIGN

HIGH-POWER ANALYSIS

FULL-WAVE ANALYSIS

Electromagnetic Analysis

FEST3D is able to efficiently analyse passive microwave structures in waveguide technology. Basically, FEST3D is based on an Integral Equation Technique combined with the Method of Moments. Additionally, the Boundary Integral-Resonant Mode Expansion (BI-RME) method is employed for extracting the modal chart of complex waveguides with complex shapes and the resonant modes of arbitrarily-shaped cavities. The combination of these integral equation methods ensures a high degree of accuracy as well as reduced computational resources (in terms of CPU time and memory).

Moreover, unlike mode-matching techniques, the electromagnetic algorithms employed in FEST3D minimize the problems of relative convergence leading to more confident results. Additionally, the integral equation technique has been formulated to perform most of the intensive computations in the frequency-independent part, which results in a significant speed up per frequency point when compared to standard mode-matching techniques. This benefit is more evident when many modes are required for an accurate analysis of the component.

Circuits are easily created by using predefined building blocks:

• Rectangular, Circular and Coaxial waveguides

• Coaxial feeds

• Single- and multi- ridged waveguides

• Cross-shaped irises

• Circular waveguides with screws

• Bends

• H-plane and E-plane arbitrarily-shaped metallic elements

• T-junctions and Magic-tees

• Compensated T and Magic-tee junctions

• Arbitrarily-shaped waveguides and irises

• Coaxial cavity resonators

Based on these main building blocks, the user can analyse a wide range of passive components with FEST3D:

• Comb-line filters

• Dual-mode filters

• Bandpass filters

• Inter-digital filters

• Multiplexers

• Waffle-iron filters

• Couplers

• Evanescentfilters

• Polarizers

• PowerDividers

• OMT’s

FEST3D performs accurate and fast analyses based on Integral Equation Techniques

Synthesis

FEST3D includes tools to automatically design several types of components from user specifications: bandpass filters, lowpass filters, rectangular tapers and dual-mode filters.

The tools in FEST3D employ state-of-the-art synthesis methods. For this reason, inductive bandpass filters can be synthesized without post-optimization even for relative bandwidths as large as 20-25%. Also lowpass filters can be synthesized without post-optimization. In order to reach this degree of accuracy during the synthesis procedure, full-wave simulations are also performed in order to consider higher waveguide modes.

Furthermore, a synthesis module for dual-mode filter based on cylindrical resonators has been integrated. It allows designing, automatically from user specifications, typical narrow-band dual-mode filters with different orders.

Optimization

FEST3Dhasanoptimizationtool(OPT)fortherefinementof the component geometrical parameters in order to recover the desired response. The OPT supportsmultiple optimisation algorithms such as: Downhill simplexmethod,Powell’sdirectionsetmethod,andaglobal optimizer (genetic).

The OPT also supports weighted constraints on theparameters being optimised.

The OPT progress can be monitored in real time, aswell as stopped, reconfigured and resumed from the Graphical User Interface (GUI) at any time.

On the other hand, FEST3D keeps in memory the frequency-independent part results of the latest simulations. This allows speeding up the optimization process since elements whose dimensions have not changed do not need to be recomputed.

Guiding your waves

FEST3D advanced synthesis modules

allow designing bandpass, dual-mode

and lowpass filters

High-Power analysis

FEST3D can be used to analyse high-power breakdown phenomena (such as Gas Discharge - Corona - and Multipactor) in passive waveguide components. The High Power module integrated into FEST3D is capable to determine the Multipactor power breakdown level in complex passive components. Such a module considers both the actual electromagnetic field distribution and the electron dynamics inside the device allowing for an accurate computation.

Multipactor analysis can also be done with arbitrary multi-carrier signals as well (any number of carriers, frequencies and phases).

The High Power module also allows determining the breakdown power level of RF discharges in the presence of a gas (Corona discharge).

Recently a new module has been integrated into FEST3D, SPARK3D, which is able to analyse high power phenomena by importing EM fields from commercial EM solvers such as HFSS™ and CST®.

FEST3D is the first tool that integrates high power analysis in the design process

Add-ons

Multi-threading

FEST3D computations can be performed on several processors simultaneously. This allows employing all the available processors in a computer in order to significantly speed up the calculations. In addition to this, FEST3D is also available in 64-Bit version.

Export to HFSS™ and CST®

FEST3D allows generating HFSS™ and CST® project files from a FEST3D simulation. This feature permits the user to easily analyse a circuit with different software tools for comparison purposes.

FEKO Interface

FEST3D can exchange the Generalized Scattering Matrix of a circuit with FEKO. This feature allows theuser importing or exporting the electromagnetic results between both CAD tools.

Tolerance analysis

The tolerance analysis tool in FEST3D allows the user to easily perform sensitivity analysis of the final design. The user can choose which geometrical parameter/s to modify and the deviation of each one can be set separately.

3D Geometry Export

FEST3D allows exporting the generated 3D model to standard CAD formats that can be used to import the structure into other software tools or into, e.g., milling machines.

Guiding your waves

AURORASAT offers its strong expertise

in electromagnetism and high power phenomena to

provide technical support and consultancy

services adapted to your needs

HFSS™

FEKO

CST®

CAD TOOLS

ANSYS is a copyright of ANSYS, Inc. HFSS is a trademark of ANSYS, Inc.

Examples

Bandstop filter

A bandstop filter has been designed at 10 GHz based on the concept from Matthei, Young and Jones. The computational time is 1.5 seconds for the frequency-independent part and 0.05 second per frequency point in a PC Core 2 Duo @ 2.94 GHz. The bandstop response has been centred at 10 GHz by changing the length of the tuning screws making use of the optimization tool.

Coaxial Interdigital Filter

The following inline interdigital filter has been designed centred at 1.75 GHz with a bandwidth of 100 MHz. The total simulation time was 120 seconds.

Webinars to demonstrate capabilities of FEST3D

are offered on demand

Universidad Politécnica de Valencia Edificio de Desarrollo Empresarial 9B Camino de Vera, s/n 46022 Valencia, Spain

Phone +34 963 714 257

Fax +34 963 714 254

E mail contact@aurorasat.es

www.aurorasat.es

For a full DEMO version freely downloadable please visit:

www.fest3d.com/download.php

The DEMO version allows you to run more than 50 predefined examples.

If you wish to use a FEST3D trial version for a 6 week period, please contact us: