Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces...
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Transcript of Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces...
![Page 1: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/1.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
1UIUCUH
Initial Problems Pieces
Develop Understanding of Coupling
Early Catalog of Expected Waveforms at Circuit Terminals
Incorporate into Topological Models
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Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
2UIUCUH
Short-Term ProblemsWires and Slots
• Obtain useful information quickly – 10 months
• Develop understanding of coupling mechanisms
• Assess influence of wires and slots on waveforms
• Catalog waveforms that can be expected at a pin of a digital system
![Page 3: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/3.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
3UIUCUH
Wire Excited through Slot
![Page 4: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/4.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
4UIUCUH
Wire through Hole
![Page 5: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/5.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
5UIUCUH
Wires Coupled through Slot
![Page 6: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/6.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
6UIUCUH
Slot Excited Wire between Plates
![Page 7: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/7.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
7UIUCUH
Wire through Holes in Parallel Plates
![Page 8: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/8.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
8UIUCUH
Short-Term ProblemsCascaded Coaxial Cavities
• Obtain useful information quickly – 12 months
• Develop understanding of coupling mechanisms involving cascaded cavities
• Assess influence of cascaded cavities on waveforms
• Catalog waveforms that can be expected at the terminus of a chain of cascaded cavities
![Page 9: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/9.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
9UIUCUH
Effects of Propagation Path on Transient Signal – Cascaded Cavities
Coax Terminationw/ Load
Casaded CoaxialCavities
Transient Signal Excitation
PlanarDiscontinuities
![Page 10: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/10.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
10UIUCUH
Effects of Propagation Path on Transient Signal – Cascaded Cavities with Load
LZ
Load Im pedance
C asaded C oaxia lC avities
T ransient S ignal Excitation
P lanarD iscontinuities
![Page 11: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/11.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
11UIUCUH
Wire in Cascaded Cavities Loaded by Disk
C oax Term inationw/ Load
C asaded C oaxia lC avities
T ransient S ignal Excitation
P lanarD iscontinuity R esistive D isk
![Page 12: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/12.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
12UIUCUH
Open Wire in Cascaded Cavities Loaded by Disk
R esistive D isk
C asaded Coaxia lC avities
T ransient S ignal Excitation
P lanarD iscontinuity
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Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
13UIUCUH
Coupling into Cascaded Cavities
LZ
PEC Screen
Load Im pedance
W ireSm all Entry H ole
C asaded C oaxia lC avities
T ransient S ignal Excitation
P lanarD iscontinuities
Sm all H ole
![Page 14: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/14.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
14UIUCUH
Coupling into Cascaded Cavities
LZ
PEC Screen
Load Im pedance
Thin-W ire Antenna
Sm all Aperture
C asaded C oaxia lC avities
T ransient S ignal Excitation
P lanarD iscontinuities
![Page 15: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/15.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
15UIUCUH
Coupling into Cascaded Cavities
LZ
PEC Screen
Load Im pedance
Thin-W ire Antenna
Sm all Aperture
C asaded C oaxia lC avities
T ransient S ignal Excitation
P lanarD iscontinuities
,qJ
![Page 16: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/16.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
16UIUCUH
Short-Term ProblemsFast Time-Domain Methods
Development
• Fast time-domain integral equation methods for inhomogeneous material regions
• Hybrid circuit theory -- TDIE analysis
• TDIE analysis for slowly varying (in time) fields
• Accurate TDIE for weak penetration through apertures
![Page 17: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/17.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
17UIUCUH
Proposed Effort (Year 1): Algorithms and Implementations
• Develop PWTD enhanced TDIE solvers with material capability (6 mo.)
• Interface PWTD enhanced TDIE solvers with SPICE-like circuit solver (12 mo.)
• Develop “low frequency” stable PWTD / TDIE solver (12 mo.)
– Hybridize loop/star/tree and time Galerkin schemes (Industry strength implementation)
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Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
18UIUCUH
Proposed Effort (Year 1): Demonstration of Capabilities
• Analyze coupling into a nonlinear circuit (amplifier) in a realistic enclosure (12 mo.)– Geometry: Slots, cavities, pins,
nonlinear circuitry.
– Demonstrates all capabilities of solver
– Validation: through comparison to FDTD solution.
slotcircuitry
cavityboards + pins
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Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
19UIUCUH
Short-Term ProblemsFast Frequency-Domain Methods
Development
• Fast frequency-domain integral equation methods for exterior-to-interior coupling problem – specialization of existing codes
• Fast frequency-domain integral equation methods for very low frequencies (for FFT)
• Fast hybrid methods -- specialization• Serve as checks of other more specialized analyses
![Page 20: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/20.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
20UIUCUH
EMI Threat to Aircraft SystemsAirborne Transmitter
Ground-based orship-board Transmitter
PEDSLightening
External Threat
• Coupling from other Aircraft Systems• Natural Environmental Effects (Lightening, Static Electricity)• Man Made Sources External to the aircraft (High Intensity Radiated Fields - HIRF)
Internal Threat
• Portable Electronic Devices (PEDS) carried by passengers
Picture from NASA-Langley
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Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
21UIUCUH
Penetration through Loaded Slots and Cracks
• Most typical coupling occurs through slots and cracks
• Closed form expressions will be developed for various 2D slots and 3D straight slots by analogy to wire scattering
• Develop an understanding of good shielding practices and relative levels of penetration among the various slots geometries
• Develop methods for equivalent circuit extraction
![Page 22: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/22.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
22UIUCUH
Coupling though Slots in Loaded Structure
• Develop general purpose frequency domain techniques for coupling into loaded geometries
• Validation of other techniques
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Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
23UIUCUH
Short-Term ProblemsApplication of EIGER
• Obtain useful information quickly – 12 months
• Develop understanding of coupling mechanisms involving moderately complex structures
• Use as a quick check on more problem-specific analyses
• EIGER will also be used for longer-term complex problems
![Page 24: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/24.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
24UIUCUH
EIGEREIGER May Be Used for General-Purpose EM Calculations
and Code Validation
• EIGER is a general-purpose EM modeling code being developed jointly by
U. Houston Navy (SPAWAR) Lawrence Livermore Nat’l Lab Sandia Nat’l Labs
• Special purpose codes are likely to be needed to efficiently obtain the desired parameters in some cases.
• We anticipate using EIGER to obtain initial results,validate new codes, and perform general EM modeling.
![Page 25: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/25.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
25UIUCUH
EIGEREIGER Takes A “Next Generation” Approach to Computational Electromagnetics
• Maintainability, extendibility, availability Current development efforts: U. Houston, U. Washington, Brigham Young, Virginia Tech
• A rich set of features allows treatment of complex problems using appropriate optimal combination of techniques
• Applicable to a wide variety of EM problems (antennas, RF, EMI, EMC, RCS, etc.)
Eiger can serve as “computational kernel” for special purpose applications, like FSSBuild, a periodic phased array and FSS
analysis interface
• High performance computing (HPC) capability incorporated into design
Object- oriented philosophy
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Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
26UIUCUH
Generality allows one to select the right treatment for each part of a complex problem ...
Elements
Expansions Excitation
SolversOperatorsBoundary
Conditions
ElementsGreen’sFunc.
Expansions Excitation
Solversapertureaperturecouplingcoupling
edge edge treatmenttreatment
rotationalrotationalsymmetrysymmetry
![Page 27: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/27.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
27UIUCUH
MURI-Related Example
Conducting Wire with 50 Loads, Terminated on Interior Walls of an Conducting Box with Two Apertures, Excited by a Voltage Source
+ -
0.4 m
0.6 m
0.36 m
![Page 28: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/28.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
28UIUCUH
A Variety of Boundary Conditions are Required:
•Aperture
•Conducting surface
•Wire
•Terminating loads
![Page 29: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Initial Problems Pieces Develop Understanding of Coupling Early Catalog of Expected.](https://reader036.fdocuments.us/reader036/viewer/2022081603/56649e4f5503460f94b46a82/html5/thumbnails/29.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
29UIUCUH
A Combination of Element, Excitation, and Current Types is Needed
Element types:
triangles
quadrilaterals
wires
Possible excitation types:
interior:
voltage source
exterior:
plane wave
V
Current types:
two-sided element, ,J M
single-sided element, J
wire element, J