10-becker Co-simulation Cds.pdf
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CST STUDIO SUITE™ 2008 Application and Feature Tutorial
EM Circuit Co-Simulation with CST DESIGN STUDIO™ New Features 2008 Frequency Domain - Matching Network - Combine Results
Time Domain - IBIS / SPICE - TDR / Eye Diagram
1 ube / v1.0 / 14. Sep 2007
www.cst.com
New Layout Editor in CST DS 2008 1. Model opens in CST DS
5. 3D Model has changed
2. Edit block properties
3. MWS 3D View 4. Update model in MWS
2
www.cst.com • Oct-07 www.cst.com
New Blocks in CST DS 2008 IBIS Import Block Spice Import Block Support of Berkley Spice Import of nested submodels possible
Generalized TML Reference Block Works equivalent to “Generalized Transmission Line Block“; takes over characteristics from connected MWS block Connection to parameterized MWS block required
3
www.cst.com • Oct-07 www.cst.com
Tuning Sliders in CST DS 2008 variable Length
4
www.cst.com • Oct-07 www.cst.com
CST DESIGN STUDIO™ Frequency Domain Matching Networks Combine Results (including circuit behaviour)
5
www.cst.com
Antenna Matching
Perfect match
Serial inductor
External port
6
Inductance
1.8 GHz
Phase shifter or transmission line
Ideal phase shifter
50Ω -58.8°
PIFA Antenna
Results from CST MWS (3D EM)
www.cst.com
Results of Matching Original return loss
7
Matched antenna (at 1.8 GHz)
www.cst.com
Combine results in CST DS farfield monitors:
Monitors including matching network
matched unmatched
8
www.cst.com
Co-simulation Example: Dual Patch Antenna
9
www.cst.com
CST DESIGN STUDIO™: Connect Ports in Schematic View Add ideal phase shifter
First define global parameter „ph“ in CST DESIGN STUDIO™
10
www.cst.com
Combine Results creates new results in the CST MWS tree
11
www.cst.com
Postprocessing
12
www.cst.com
CST DESIGN STUDIO™ 2008 Time Domain Signal Library New SPICE and IBIS Import Blocks Eye Diagram + TDR
13
www.cst.com
Transient Analysis
14
www.cst.com
Available Time Signals
15
www.cst.com
IBIS Input Block Input buffer Example 5V is the typical driving voltage for the buffer used.
Input voltage (pulse)
16
Current measured at input
www.cst.com • Oct-07 www.cst.com
Example: Eye Diagram Differential Via Pair
17
www.cst.com
Add transmission line sections Switch to CST DESIGN STUDIO ™
Add external ports, transmission lines and probes
set length of transmission lines to 1000 (mils) 18
www.cst.com
Set-up simulation task
19
www.cst.com
Results Run Transient simulation
Differential input
20
Differential output
www.cst.com
SPICE Model can be extracted from any block
Touchstone to SPICE Converter (multiple blocks can be combined in a DS-nested block and then converted)
21
www.cst.com
Shortcuts
SHIFT-O places a monitor/probe C to create connection lines P to place an external port G = ground SHIFT-R = Resistor SHIFT-L = Inductor SHIFT-C = Capacitor R = rotate block right (clockwise) L = rotate block left (counterclockwise)
more shortcuts, please check the Online help (search „shortcut“) 22
www.cst.com
CST STUDIO SUITE™ 2008 Application and Feature Tutorial
EM Circuit Co-Simulation with CST DESIGN STUDIO™ New Features 2008 Frequency Domain - Matching Network - Combine Results
Time Domain - IBIS / SPICE - TDR / Eye Diagram
23 ube / v1.0 / 14. Sep 2007
www.cst.com
24
www.cst.com
MWS –License; no DS 0 EUR
Block Elements available: • Phase shifter • Variable reflection • Perfect absorber • 3dB Splitter • Directional Coupler • MWS Netlist Block • MWS Clone Block • RLC-GND Circuit Elements
Canvas available Antenna Task No DS-Frontend No ParameterSweep No Optimization No Caching
2006B: also Touchstone Block included
25
2008? Tuning Sliders? SPICE + IBIS? Layout? Gen Transmission Line Block?
www.cst.com
Preinstalled Examples
26
www.cst.com
CST DESIGN STUDIO Single ended ports for MWS simulation
Add external circuit (ports) in DS
S-parameters (e.g. Differential ports, external circuit) 27
www.cst.com
ENDE 28
www.cst.com
Transient Co-Simulation of Mixer Application ID 268 180°Hybrid microstrip junction Integration of active and system level simulation with full 3D EM simulation 1GHz signal at RF port, 0.993 GHz signal at LO port, 50 Ω termination at IF port Optimization of matching network required
Full 3D CST MWS model of the hybrid mixer (with external diodes)
29
www.cst.com
Transient Co-Simulation of Mixer Application ID 268 CST MICROWAVE STUDIO® Time Domain solver
CST DESIGN STUDIO™
Seamless integration of 3D EM part and circuit part Cross-platform optimization Schematic View of the CST MWS / CST DS Co-Simulation
30
Transient task
www.cst.com
Transient Co-Simulation of Mixer Application ID 268
3
d=142
Output Signal
2 1 0 -1 -2 -3
0
200
400
600
800
1000
Time / ns 31
www.cst.com
Transient Co-Simulation of Mixer Application ID 268 Mixer spectra 0
Power / dBm
-10
-20 CST DS Circuit with Matching Network
-30
-40
-50 0
1
2
3
4
5
6
7
8
9
10
Frequency / Ghz 32
www.cst.com
Transient Co-Simulation of Mixer Application ID 268 0
-20 S-Paramer in dB
(after matching) -40
-60
-80
-100 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4
Frequency / Ghz 33
www.cst.com
EM Circuit Co-Simulation with CST DESIGN STUDIO™ New Features 2008 Frequency Domain - Matching Network - Combine Results
Time Domain - IBIS / SPICE - TDR / Eye Diagram
1 ube / v1.0 / 14. Sep 2007
www.cst.com
New Layout Editor in CST DS 2008 1. Model opens in CST DS
5. 3D Model has changed
2. Edit block properties
3. MWS 3D View 4. Update model in MWS
2
www.cst.com • Oct-07 www.cst.com
New Blocks in CST DS 2008 IBIS Import Block Spice Import Block Support of Berkley Spice Import of nested submodels possible
Generalized TML Reference Block Works equivalent to “Generalized Transmission Line Block“; takes over characteristics from connected MWS block Connection to parameterized MWS block required
3
www.cst.com • Oct-07 www.cst.com
Tuning Sliders in CST DS 2008 variable Length
4
www.cst.com • Oct-07 www.cst.com
CST DESIGN STUDIO™ Frequency Domain Matching Networks Combine Results (including circuit behaviour)
5
www.cst.com
Antenna Matching
Perfect match
Serial inductor
External port
6
Inductance
1.8 GHz
Phase shifter or transmission line
Ideal phase shifter
50Ω -58.8°
PIFA Antenna
Results from CST MWS (3D EM)
www.cst.com
Results of Matching Original return loss
7
Matched antenna (at 1.8 GHz)
www.cst.com
Combine results in CST DS farfield monitors:
Monitors including matching network
matched unmatched
8
www.cst.com
Co-simulation Example: Dual Patch Antenna
9
www.cst.com
CST DESIGN STUDIO™: Connect Ports in Schematic View Add ideal phase shifter
First define global parameter „ph“ in CST DESIGN STUDIO™
10
www.cst.com
Combine Results creates new results in the CST MWS tree
11
www.cst.com
Postprocessing
12
www.cst.com
CST DESIGN STUDIO™ 2008 Time Domain Signal Library New SPICE and IBIS Import Blocks Eye Diagram + TDR
13
www.cst.com
Transient Analysis
14
www.cst.com
Available Time Signals
15
www.cst.com
IBIS Input Block Input buffer Example 5V is the typical driving voltage for the buffer used.
Input voltage (pulse)
16
Current measured at input
www.cst.com • Oct-07 www.cst.com
Example: Eye Diagram Differential Via Pair
17
www.cst.com
Add transmission line sections Switch to CST DESIGN STUDIO ™
Add external ports, transmission lines and probes
set length of transmission lines to 1000 (mils) 18
www.cst.com
Set-up simulation task
19
www.cst.com
Results Run Transient simulation
Differential input
20
Differential output
www.cst.com
SPICE Model can be extracted from any block
Touchstone to SPICE Converter (multiple blocks can be combined in a DS-nested block and then converted)
21
www.cst.com
Shortcuts
SHIFT-O places a monitor/probe C to create connection lines P to place an external port G = ground SHIFT-R = Resistor SHIFT-L = Inductor SHIFT-C = Capacitor R = rotate block right (clockwise) L = rotate block left (counterclockwise)
more shortcuts, please check the Online help (search „shortcut“) 22
www.cst.com
CST STUDIO SUITE™ 2008 Application and Feature Tutorial
EM Circuit Co-Simulation with CST DESIGN STUDIO™ New Features 2008 Frequency Domain - Matching Network - Combine Results
Time Domain - IBIS / SPICE - TDR / Eye Diagram
23 ube / v1.0 / 14. Sep 2007
www.cst.com
24
www.cst.com
MWS –License; no DS 0 EUR
Block Elements available: • Phase shifter • Variable reflection • Perfect absorber • 3dB Splitter • Directional Coupler • MWS Netlist Block • MWS Clone Block • RLC-GND Circuit Elements
Canvas available Antenna Task No DS-Frontend No ParameterSweep No Optimization No Caching
2006B: also Touchstone Block included
25
2008? Tuning Sliders? SPICE + IBIS? Layout? Gen Transmission Line Block?
www.cst.com
Preinstalled Examples
26
www.cst.com
CST DESIGN STUDIO Single ended ports for MWS simulation
Add external circuit (ports) in DS
S-parameters (e.g. Differential ports, external circuit) 27
www.cst.com
ENDE 28
www.cst.com
Transient Co-Simulation of Mixer Application ID 268 180°Hybrid microstrip junction Integration of active and system level simulation with full 3D EM simulation 1GHz signal at RF port, 0.993 GHz signal at LO port, 50 Ω termination at IF port Optimization of matching network required
Full 3D CST MWS model of the hybrid mixer (with external diodes)
29
www.cst.com
Transient Co-Simulation of Mixer Application ID 268 CST MICROWAVE STUDIO® Time Domain solver
CST DESIGN STUDIO™
Seamless integration of 3D EM part and circuit part Cross-platform optimization Schematic View of the CST MWS / CST DS Co-Simulation
30
Transient task
www.cst.com
Transient Co-Simulation of Mixer Application ID 268
3
d=142
Output Signal
2 1 0 -1 -2 -3
0
200
400
600
800
1000
Time / ns 31
www.cst.com
Transient Co-Simulation of Mixer Application ID 268 Mixer spectra 0
Power / dBm
-10
-20 CST DS Circuit with Matching Network
-30
-40
-50 0
1
2
3
4
5
6
7
8
9
10
Frequency / Ghz 32
www.cst.com
Transient Co-Simulation of Mixer Application ID 268 0
-20 S-Paramer in dB
(after matching) -40
-60
-80
-100 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4
Frequency / Ghz 33
www.cst.com
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