Transcript On-glass wire antenna

CST STUDIO SUITE™ 2006
Application and Feature Tutorial
Automotive Applications
L. Sassi
Import CATIA5, stl
Thin sheet body car
On-glass wire antennas
Broad band transient analysis
Surface Current
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Why CST STUDIO SUITE 2006™ for
Automotive applications?
1. User friendly interface for importing of body car, dielectric
windscreens or for designing antenna parts
2. Accurate and Robust PBA meshing for solid and thin sheet
shapes
3. Linear growing of the memory effort with the No. of mesh
cells, allowing the use of PCs rather than expensive
workstations/clusters
4. Broadband analysis: DC, AM/FM, remote control, GSM,
GPS in one single simulation
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Why CST STUDIO SUITE 2006™ for
Automotive applications?
1. Simultaneous excitations of ports for mutual coupling
analysis
2. Far field and Near field calculations both in time domain
(probes) and frequency domain (field on curves)
3. Far field calculation over lossy ground enabling the
simulation of outdoor test ranges
4. Accurate calculation and visualization of 3D fields and
surface current for antenna and cable placement
5. Exporting data to in-house or third party tools
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Body Car import: Catia5, step, stl,....
Body Car can easily be imported:
• Thin sheet shapes via stl/Nastran format
• 3D shapes via CATIA5, step, iges
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Windscreen and On-glass wire antenna
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Windscreen: Thicken Sheet
Both thin sheet shapes and 3D shapes
import options are available
On arbitrary thin sheet shapes
can be assigned a thickness
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On-glass wire antenna: import 1D curves
Transform Curves to Wires
Important: curves will not be included
in simulation only wires will be!
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BMW analysis: DC, AM/FM up to GPS
GPS patch antenna
AM/FM on-glass wire
antenna
GSM monopole antenna
Remote control loop sensor
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Harness signal/power cable
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GMS monopole antenna
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Monopole Farfields @ 900MHz
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1D Results
Comparison with car and without car
Car and other sources
may interference
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GPS patch antenna
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Patch Antenna Farfields @ 2.5GHz
About 20mio mesh nodes
CPU time 14h, 3.2GHz
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1D Results
Comparison with car and without car
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AM/FM on-glass wire antenna
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On-glass antenna @ 90MHz
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1D Results
Comparison with car and without car
Car and other sources
may interference
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Far Field and Near Field approximations
E field visualization allows using
near field approximation
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Lossy dielectric plane can be
used in order to decouple the
near field space
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Remote control loop sensor
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Loop H-Field @ 430MHz
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Harness signal/power cable
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DC surface current
By means of Combine Results it is
possible to calculate the global
effect of all interference sources
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Discrete Ports > Currents > |I| linear
[1] Monopole
[2] Loop
[3] Cable
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Discrete Port 3 total current Abs
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Evaluate field on Curve
Using the arrow key it is possible to mark
the field values on the curve
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Evaluate field on Curve / 1D Plot
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Export Field in ASCII file on selected solid
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Automotive Application
Summary
1. Advantage of using CST STUDIO SUITE 2006™ in the
automotive industries
2. Import and design of an on-glass wire antenna and
windscreen (thin sheet and 3D wire models)
3. BMW mounting AM/FM, remote control loop, GSM and
GPS antennas, DC analysis in harness cables
4. Far field analysis with and without car
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Evaluate field on Curve / 1D Plot
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