Test

FEST3D analysis based on:

• Integral equation + Method of Moments + Network Theory.

• BI-RME Method, Cavity theory...

FEST3D design:

• Dual-mode, Lowpass, Bandpass, Transformers.

FEST3D high power analysis:

• Multipactor

• Arcing (Corona)

DESIGN

HIGH-POWER ANALYSIS

FULL-WAVE ANALYSIS

FEST3D is able to analyse:

• Comb-line filters

• Dual-mode filters

• Multiplexers

• Waffle-iron filters

• Couplers

• Power Dividers

• Polarizers

• Inter-digital filters

• OMT’s

• Infinite phased arrays

• …

FEST3D is able to synthesize:

• Wideband bandpass filters

• Corrugated lowpass filters

• Transformers

• Dual-mode filters

In the following, FEST3D simulations have been compared to:

• Finite Element based software.

• Finite Integration based software.

• Measurements.

Most of the examples shown are taken from the literature.

S-parameters in waveguide elements: Canonical Filter

*Kocbach, J. Folgero, K. ,

“Design procedure for waveguide filters with cross-couplings”,

International Microwave Symposium, 2002, Page(s): 1449 - 1452

Frequency independent part: 0.9 s

Frequency dependent part: 0.09 s/fp

Total Simulation time (100 fp): 10 s

S-parameters in waveguide elements: Moreno coupler with coaxial ports

Frequency independent part: 37 s

Frequency dependent part: 0.22 s/fp

Total Simulation time (100 fp): 60 s

S-parameters in waveguide elements: Waveguide assemblies

Frequency independent part: 3 s

Frequency dependent part: 0.00026 s/fp

Total Simulation time (100 fp): 3 s

S-parameters in waveguide elements: Multiplexers

Courtesy of the Technical University of Valencia

Frequency independent part: 9 s

Frequency dependent part: 0.05 s/fp

Total Simulation time (200 fp): 19 s

S-parameters in waveguide elements: Ridge Filter

Frequency independent part: 0.9 s

Frequency dependent part: 0.3 s/fp

Total Simulation time (500 fp): 151 s

S-parameters in waveguide elements: Diplexer with compensated T-junction

Frequency independent part: 1.5 s

Frequency dependent part: 0.006 s/fp

Total Simulation time (500 fp): 4.5 s

S-parameters in waveguide elements: Waffle-Iron filter

*Manuilov, M. B., Kobrin, K. V.,

“Field Theory CAD of Waffle-iron filters”, European Microwave Conference, 2005.

Frequency independent part: 0.6 s

Frequency dependent part: 0.001 s/fp

Total Simulation time (150 fp): 0.8s

S-parameters in waveguide elements: Bandpass filter with coaxial excitation

Frequency independent part: 10 s

Frequency dependent part: 0.055 s/fp

Total Simulation time (300 fp): 26 s

S-parameters in waveguide elements: Waffle-Iron filter

Frequency independent part: 1.7 s

Frequency dependent part: 0.008 s/fp

Total Simulation time (300 fp): 4.1 s

S-parameters in waveguide elements: Bends

Frequency independent part: 2 s

Frequency dependent part: 0.06 s/fp

Total Simulation time (100 fp): 8 s

S-parameters in waveguide elements: Inductive dual-mode filter

*Guglielmi, M., Jarry, P., Kerherve, E., Roquebrun, O, Schmitt, D.

“A new family of all-inductive dual-mode filters”, IEEE Transaction on Microwave Theory and

Techniques, 2001, Page(s): 1764-1769, vol 49, Issue 10.

Frequency independent part: 0.2 s

Frequency dependent part: 0.002 s/fp

Total Simulation time (100 fp): 0.6 s

S-parameters in waveguide elements: Bandpass with inductive posts

*Meyer, P.,

“The design and analysis of waveguide E-plane filters with multiple round inductive posts

using a moment.method approach”, IEEE Africon 1996, Page(s) 532-535, vol 1.

Frequency independent part: 3 s

Frequency dependent part: 0.0005 s/fp

Total Simulation time (100 fp): 3.2 s

S-parameters in waveguide elements: Band-pass with 3D rounded corners

Courtesy of Virginia Diodes, Inc.

Frequency independent part: 9 s

Frequency dependent part: 0.001 s/fp

Total Simulation time (500 fp): 9.5 s

S-parameters in waveguide elements: 10 channel Multiplexer

Courtesy of the Technical University of Valencia

Frequency independent part: 25 s

Frequency dependent part: 1 s/fp

Total Simulation time (500 fp): 525 s

S-parameters in waveguide elements: High-power resonant ring

Frequency independent part: 1 s

Frequency dependent part: 0.2 s/fp

Total Simulation time (100 fp): 21 s

Courtesy of the Public University of Navarra

S-parameters in waveguide elements: Coaxial-to-waveguide transitions

Coaxial to waveguide transitions can be simulated in few seconds (broadband)

S-parameters in waveguide elements: Evanescent filter

Frequency independent part: 5.6 s

Frequency dependent part: 0.02 s/fp

Total Simulation time (200 fp): 9.7 s

S-parameters in waveguide elements: Bandstop*

* Matthei, Young & Jones, Microwave Filters, Impedance Matching Networks…, 1964

Frequency independent part: 1 s

Frequency dependent part: 0.02 s/fp

Total Simulation time (100 fp): 3 s

S-parameters in waveguide elements: Re-entrant post cavity filter

Frequency independent part: 300 s

Frequency dependent part: 0.02 s/fp

Total Simulation time (100 fp): 302 s

S-parameters in waveguide elements: Re-entrant post cavity filter

S11 (FEST3D)

S21 (FEST3D)

S11(FE)

S21(FE)

Frequency independent part: 272 s

Frequency dependent part: 0.005 s/fp

Total Simulation time (100 fp): 272 s

Synthesis in waveguide elements: Dual-mode filter

In collaboration with the Technical University of Valencia

Automatic synthesis

3 min procedure!!

NO Post-optimization required

Synthesis on TE11n (n=1,..,5) and up to 12 poles is available

Simulation vs. Measured data

Synthesis in waveguide elements: Bandpass filter with rounded corners

• 5-pole, rounded corners, NO POST-OPTIMIZATION!!

• Total synthesis time: 10 seconds.

In collaboration with the Technical University of Valencia

Full-Wave Response

17% BW, Equiriple response!

Synthesis in waveguide elements: Lowpass filter

• NO POST-OPTIMIZATION!!

• Total synthesis time: 3 seconds.

In collaboration with the Technical University of Valencia

Full-Wave Response

Gas discharge (Corona):

• Breakdown determination in waveguides.

• Breakdown determination in Coaxial cavity elements.

• Breakdown at ambient pressure.

Vacuum discharge (Multipactor):

• Breakdown determination in waveguides.

• Breakdown determination in Coaxial cavity elements.

• Multicarrier Multipactor Simulation.

High power features

High power features

Multipactor Breakdown onset in a set of filters

FEST3D prediction has been crosschecked with more than 50 measurements:

Summary of breakdown levels in silver plated components

High power features

Air breakdown in corrugated lowpass filter

Breakdown in the presence of dry air

Multipactor Breakdown (vacuum):

8 W

E field

High power features

RF Breakdown in Coaxial Cavity filters