Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling...
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Transcript of Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling...
![Page 1: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/1.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
1UIUCUH
Longer-Term Coupling AnalysisPieces
Develop Understanding of Complex Coupling
Incorporate into Topological Models
Validate Simpler Topological Models
(Twelve to Twenty-Four Months)
![Page 2: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/2.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
2UIUCUH
Long-Term ProblemsNested Boxes with Slots and Wires
• Develop understanding of complex coupling
• Boxes with wires and slots
• Nested boxes with wires and slots
• Coupled boxes with wires and apertures
• Embed pieces in topological structures
![Page 3: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/3.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
3UIUCUH
Wire thru Hole in Box with Interior Feature
Wire
Small HoleMetal Box
Interior Feature
![Page 4: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/4.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
4UIUCUH
Nested Boxes with Wire thru Holes
Wire
Small HoleMetal Box
Interior Feature
![Page 5: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/5.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
5UIUCUH
Alternate Wire Route & Slotted Box
Wire
Small HoleMetal Box
Interior Feature
Slot
Wire
![Page 6: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/6.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
6UIUCUH
Multiple Boxes in Box with Wire
Wire
Small HoleMetal Box
Interior Features
![Page 7: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/7.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
7UIUCUH
Multiple Boxes, Slotted Boxes, Wire through Walls
Wire
Small HolesMetal Box
Interior Features
Slots
Wire
![Page 8: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/8.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
8UIUCUH
Rectangular Cavity Coupled to Coaxial Cavity via Wire in Hole
Wire
Small HoleMetal Box
Interior Feature
Slot Coaxial Cavity
![Page 9: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/9.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
9UIUCUH
Coupled Cavities Rectangular-Coaxial-Rectangular
W ire
Sm all H oleM etal Box
S lot
Interior Features
![Page 10: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/10.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
10UIUCUH
Long-Term ProblemsCovered (Shielded) Apertures
• Develop understanding of shielded apertures
• Slot in screen covered by “grounded” shield
• Slot in upper plate of parallel plate guide covered by covered by “grounded” shield
• Embed in topological structure
![Page 11: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/11.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
11UIUCUH
Shielded Slot in Screen
A
BC
A
BC
![Page 12: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/12.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
12UIUCUH
Shielded Slot in Plate of Guide
R egion a
R egion c R egion o
R egion bA
BC
R egion a
R egion c R egion o
R egion bA
BC
![Page 13: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/13.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
13UIUCUH
Long-Term ProblemsFast Time-Domain Methods
Development
• Fast time-domain integral equation methods for inhomogeneous material regions
• Accurate TDIE for weak penetration through apertures
![Page 14: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/14.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
14UIUCUH
Proposed Effort (Year 1): Algorithms and Implementations
• Develop “low frequency” stable PWTD / TDIE solver (12 mo)– Hybridize loop/star/tree and time Galerkin
schemes (Industry strength implementation)
• Develop stable/accurate TDIE solvers for cavities with very small holes / seams / cracks (18 mo).
![Page 15: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/15.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
15UIUCUH
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
![Page 16: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/16.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
16UIUCUH
Long-Term ProblemsFast Frequency-Domain Methods
Development• Fast frequency-domain integral equation methods for
exterior-to-interior coupling problem• Fast frequency-domain integral equation methods for
very low frequencies (for FFT)• Fast hybrid methods• Accurate fast frequency-domain integral equation
methods for weak penetration through apertures
![Page 17: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/17.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
17UIUCUH
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
![Page 18: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/18.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
18UIUCUH
Penetration through Loaded Slots with Wire Bundles
• Adapt hybrid frequency domain methods for coupling characterization in presence of wire bundles through loaded geometries
• Develop an understanding of good shielding practices and relative levels of penetration among the various slots geometries
• Develop methods for equivalent circuit extraction
![Page 19: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/19.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
19UIUCUH
Coupling through Antennas
• Antennas are ‘doors’ to coupling from external excitations into structures
• For coupling studies, details such as wires, feed structures and loading are crucial
• Provide an understanding of coupling (in-band and out of band)
Patch or array
Vout
feed
e
r1
e
r2
e
r3
e
r4
![Page 20: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/20.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
20UIUCUH
Coupling though Slots in Loaded Structure
• Develop general purpose frequency domain techniques for coupling into loaded geometries
• Develop hybrid methods appropriate to structure and material: finite element method, integral equations with multilayer Green’s functions, and fast multipole integral methods
• Validate and compare
![Page 21: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/21.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
21UIUCUH
Long-Term ProblemsApplication of EIGER
• Analysis of complex coupling problems
• Use as a check on more problem-specific analyses
• Coupling to PC board traces, for example
![Page 22: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/22.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
22UIUCUH
Aperture Coupling to PCB Traces
• Analysis should include mutual coupling effects between traces.
• Requires efficient layered-media periodic Green’s function (Ewald acceleration, etc.).
IC
E inc
![Page 23: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/23.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
23UIUCUH
Cable Coupling to PCB Traces
• Analysis should account for cable propagation to traces.
• Analysis should also account for aperture/cable radiation effects.
IC
![Page 24: Effects of RF Pulses on Circuits and Systems – Pieces UMCUUI C 1 UIUCUH Longer-Term Coupling Analysis Pieces Develop Understanding of Complex Coupling.](https://reader035.fdocuments.net/reader035/viewer/2022062423/56649f165503460f94c2c567/html5/thumbnails/24.jpg)
Effects of RF Pulses on Circuits and Systems – Pieces
UMCU UIC
24UIUCUH
Coupling to PCB Traces
• Thevenin equivalent circuits can be obtained to model both aperture and cable penetration.
• Thevenin equivalent circuits model all EM effects up to the IC pin.
• This allows for convenient de-coupling between EM analysis and IC analysis.
IC +
-
ZT
VT