Keysight ADS Interface Tutorial

178 Pages·2017·6.04 MB·English

14.52 Rev 1.0
At Sonnet, we've been developing 3D planar high frequency EM
software since 1983, and our software has earned a solid reputa-
tion as the world's most accurate commercial planar EM analysis
package for single and multi-layer planar circuits, packages and
antennas.
Sonnet Software Inc., founded by Dr. James C. Rautio, is a pri-
vate company, entirely dedicated to the development of com-
mercial EM software. We take great pride in providing quality
technical support for our products with timely response--which
we believe to be very important for high-end technical software
products.
Sonnet is based in Syracuse, NY, USA with representatives across
the globe.
S ’ K ADS I
ONNET S EYSIGHT NTERFACE
Published: May 2018
Release 16
Sonnet Software, Inc.
126 N. Salina Street
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Phone: [phone]
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www.sonnetsoftware.com
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Rev 16.56
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Table of Contents
TABLE OF CONTENTS
TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . 5
1 THE SONNET BOX . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Coupling to the Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2 KEYSIGHT ADS INTERFACE TUTORIAL . . . . . . . . . . . . . . 15
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Installing the Keysight ADS Interface. . . . . . . . . . . . . . . . . 16
Copying the Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Adding the Sonnet Design Kit to your Workspace. . . . . . . . . 20
Generating the Layout. . . . . . . . . . . . . . . . . . . . . . . . . . 21
Importing Setup from the Schematic. . . . . . . . . . . . . . . . . 22
Substrate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Analysis Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Analysis Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Subsectioning and Analysis Options. . . . . . . . . . . . . . . . . . 35
Connectivity Checker. . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Simulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Viewing Results in Sonnet. . . . . . . . . . . . . . . . . . . . . . . . 44
Adding a Marker. . . . . . . . . . . . . . . . . . . . . . . . . 47
Viewing the Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Using the Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
3 KEYSIGHT ADS INTERFACE . . . . . . . . . . . . . . . . . . . . 57
System Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Licensing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Changes in ADS Project Organization . . . . . . . . . . . . . . . . 58
Projects versus Workspaces . . . . . . . . . . . . . . . . . 59
Installation for ADS 2009 . . . . . . . . . . . . . . . . . . . . . . . . 62
Manual Installation Using Sonnet. . . . . . . . . . . . . . 62
Manual Installation Using ADS. . . . . . . . . . . . . . . . 64
Automatic Uninstall . . . . . . . . . . . . . . . . . . . . . . 66
Manual Uninstall Using Sonnet . . . . . . . . . . . . . . . 67
5
Keysight ADS Interface
Manual Uninstall Using ADS. . . . . . . . . . . . . . . . . 67
Installation for ADS 2011 and Higher . . . . . . . . . . . . . . . . 69
Manual Installation Using Sonnet . . . . . . . . . . . . . 69
Manual Installation Using ADS . . . . . . . . . . . . . . . 70
Adding the Sonnet Design Kit . . . . . . . . . . . . . . . 71
Automatic Uninstall. . . . . . . . . . . . . . . . . . . . . . 75
Manual Uninstall Using Sonnet. . . . . . . . . . . . . . . 75
Manual Uninstall Using ADS. . . . . . . . . . . . . . . . . 75
Accessing Sonnet’s Keysight ADS Interface . . . . . . . . . . . . 77
Defining the Substrate . . . . . . . . . . . . . . . . . . . . . . . . . 77
Sonnet Materials. . . . . . . . . . . . . . . . . . . . . . . . 78
Sonnet Dielectrics. . . . . . . . . . . . . . . . . . . . . . . 81
Mapping from ADS to Sonnet. . . . . . . . . . . . . . . . 84
Viewing the Stackup . . . . . . . . . . . . . . . . . . . . . 90
Saving a Substrate File. . . . . . . . . . . . . . . . . . . . 91
Using an Existing Sonnet Substrate. . . . . . . . . . . . 91
Viewing the Stackup . . . . . . . . . . . . . . . . . . . . . 92
Defining the Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Sizes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Top Metal, Bottom Metal . . . . . . . . . . . . . . . . . . 95
Margins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Displaying the Box. . . . . . . . . . . . . . . . . . . . . . . 98
Sonnet Custom Box . . . . . . . . . . . . . . . . . . . . . . 99
Viewing the Box . . . . . . . . . . . . . . . . . . . . . . . . 100
Estimating Sonnet Processing Time. . . . . . . . . . . . 100
Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Sonnet’s Component Feature . . . . . . . . . . . . . . . 105
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Simulation Program. . . . . . . . . . . . . . . . . . . . . . 106
Subsectioning. . . . . . . . . . . . . . . . . . . . . . . . . . 107
Adaptive Sweep Settings . . . . . . . . . . . . . . . . . . 113
Project Options . . . . . . . . . . . . . . . . . . . . . . . . 115
Translation Options (ADS to Sonnet). . . . . . . . . . . 116
Model Options . . . . . . . . . . . . . . . . . . . . . . . . . 120
Create Dataset. . . . . . . . . . . . . . . . . . . . . . . . . 123
Analysis Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . 123
6
Table of Contents
Adding/Editing Frequency Sweeps. . . . . . . . . . . . 124
Editing a Frequency Type. . . . . . . . . . . . . . . . . . 126
Deleting a Frequency Type. . . . . . . . . . . . . . . . . 127
Loading Frequency Sweeps. . . . . . . . . . . . . . . . . 127
Connectivity Checker. . . . . . . . . . . . . . . . . . . . . . . . . . 127
States and Properties of the Interface. . . . . . . . . . . . . . . 128
Saving a State . . . . . . . . . . . . . . . . . . . . . . . . . 128
Loading a State . . . . . . . . . . . . . . . . . . . . . . . . 129
Loading the Analysis Setup from the Schematic . . . 130
Loading the Analysis Setup from Momentum . . . . . 130
Summary of the Interface. . . . . . . . . . . . . . . . . . . . . . . 130
Running the Simulation . . . . . . . . . . . . . . . . . . . . . . . . 131
Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Viewing the Subsectioning . . . . . . . . . . . . . . . . . 133
Estimating Box Resonances. . . . . . . . . . . . . . . . . 134
Cleaning Analysis Data . . . . . . . . . . . . . . . . . . . 135
Viewing the Results in Sonnet . . . . . . . . . . . . . . . . . . . . 135
Sonnet’s Response Viewer . . . . . . . . . . . . . . . . . 135
Current Density Viewer . . . . . . . . . . . . . . . . . . . 136
Far Field Viewer. . . . . . . . . . . . . . . . . . . . . . . . 138
Auto Documentation. . . . . . . . . . . . . . . . . . . . . 138
Viewing the Results in ADS . . . . . . . . . . . . . . . . . . . . . . 139
Creating a Dataset . . . . . . . . . . . . . . . . . . . . . . 139
Deleting a Dataset . . . . . . . . . . . . . . . . . . . . . . 140
Opening a New Data Display. . . . . . . . . . . . . . . . 141
Opening an Existing Data Display. . . . . . . . . . . . . 141
Using the Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Creating an S-Parameter Model. . . . . . . . . . . . . . 141
Deleting the Model. . . . . . . . . . . . . . . . . . . . . . 146
Translating the Layout to a Sonnet Project . . . . . . . . . . . 147
Sonnet Features Not Available in ADS. . . . . . . . . . 147
Using Sonnet’s Project Editor . . . . . . . . . . . . . . . . . . . . 148
Sonnet Task Bar. . . . . . . . . . . . . . . . . . . . . . . . 150
Utilities in the Keysight ADS Interface. . . . . . . . . . . . . . . 150
Import Mdif File. . . . . . . . . . . . . . . . . . . . . . . . 150
Open Translated Design. . . . . . . . . . . . . . . . . . . 150
7
Keysight ADS Interface
Default Settings for Sonnet . . . . . . . . . . . . . . . . . . . . . . 151
States Preferences . . . . . . . . . . . . . . . . . . . . . . 152
Analysis Box Preferences . . . . . . . . . . . . . . . . . . 153
Substrate Preferences . . . . . . . . . . . . . . . . . . . . 155
Frequencies Preferences . . . . . . . . . . . . . . . . . . 157
Ports Preferences . . . . . . . . . . . . . . . . . . . . . . . 158
ABS Options. . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Model Options . . . . . . . . . . . . . . . . . . . . . . . . . 159
Project Options . . . . . . . . . . . . . . . . . . . . . . . . 159
Simulation Program Options . . . . . . . . . . . . . . . . 159
Subsectioning Options . . . . . . . . . . . . . . . . . . . . 160
Translation Options. . . . . . . . . . . . . . . . . . . . . . 160
Other Preferences. . . . . . . . . . . . . . . . . . . . . . . 161
Keysight ADS License Check. . . . . . . . . . . . . . . . . . . . . . 163
Unlocking Sonnet Keysight ADS Interface. . . . . . . . 164
APPENDIX I VIA SIMPLIFICATION . . . . . . . . . . . . . . . . . . . . . . . 165
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Via Array Simplification . . . . . . . . . . . . . . . . . . . . . . . . 165
Via Array Criteria . . . . . . . . . . . . . . . . . . . . . . . 166
Additional Simplify Via Array Options . . . . . . . . . . 166
Simplify Via Array Options . . . . . . . . . . . . . . . . . 166
Number of New Via Metals Created . . . . . . . . . . . 172
Simplified Via Array Loss . . . . . . . . . . . . . . . . . . 172
Bar Via Group Simplification . . . . . . . . . . . . . . . . . . . . . 173
New Via Metals and Bar Via Loss . . . . . . . . . . . . . 174
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
8
Chapter 1 The Sonnet Box
Chapter 1 The Sonnet Box
Metal Box Top
The Sonnet six-sided
shielding box. The metal
walls of the box are
transparent to allow you
to see the interior of the
circuit.
Metal Side Walls
The Sonnet EM analysis is performed inside a six-sided metal box as shown
above. This box contains any number of dielectric layers which are parallel to the
bottom of the box. Metal polygons may be placed on levels between any or all of
the dielectric layers, and vias may be used to connect the metal polygons on one
level to another.
The four sidewalls of the box are lossless metal, which provide several benefits
for accurate and efficient high frequency EM analysis:
• The box walls provide a perfect ground reference for the ports.
Good ground reference is very important when you need S-
9
Rev 16.56
Keysight ADS Interface
parameter data with dynamic ranges that might exceed 50 or 60 dB,
and Sonnet’s sidewall ground references make it possible for us to
provide S-parameter dynamic range that routinely exceeds 100 dB.
• Because of the underlying EM analysis technique, the box walls
and the uniform grid allow us to use fast-Fourier transforms (FFTs)
to compute all circuit cross-coupling. FFTs are fast, numerically
robust, and map very efficiently to computer processing.
• There are many circuits that are placed inside of housings, and the
box walls give us a natural way to consider enclosure effects on
circuit behavior.
As an example, a microstrip circuit can be modeled in Sonnet by creating two
dielectric layers: one which represents your substrate, and one for the air above
the substrate. The metal polygons for the microstrip would be placed on the metal
level between these two dielectric layers. The bottom of the box is used as the
ground plane for the microstrip circuit. The top and bottom of the box may have
any loss, allowing you to model ground plane loss.
Coupling to the Box
Since the four sidewalls of the box are lossless metal, any circuit metal which is
close to these walls can couple to the walls - just like what would happen if you
fabricated and measured a real circuit with the same box. If you do not want to
model this coupling (for example, your real circuit does not have sidewalls), then
you must keep the circuit metal far away from the box sidewalls. A good rule to
use is at least three to five substrate thicknesses as shown below.
This circuit has a
substrate of 25 mils. The
spiral should be kept at
least 75-125 mils from
the box walls.
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Rev 16.56