ADS EXAMPLES

Advanced Design System (ADS) RF Simulator Examples

Microstrip-Image-8-Way-RF-Splitter-Version1-Surface-Mount-BBTLine
Microstrip-Image-8-Way-RF-Splitter-Version1-Surface-Mount-BBTLine

Basic examples using the Advanced Design System (ADS) RF Simulator

Basic simulation examples include –

using the ADS schematic element DAC (Data Access Component)

placing ports for surface mount components

correct RF Trace simulation using the ADS Momentum electromagnetic simulator

accessing archived surface mount component libraries

Harmonic Balance (HB) non-linear mixing example

using the legacy RF Budget Simulator – linear and non-linear analysis of cascaded RF chains

Harmonic Balance Intermodulation Distortion (IMD) simulations

 

 

Example 1)

The Data Access Component (DAC) in ADS

The Data Access Component (DAC) in ADS is a powerful tool  for accessing data files, yet not always easy to use.

Here is a simple example using the DAC to view several S-parameter files simultaneously:

The Data Access Component (DAC) In Advanced Design System (ADS) - A Basic Example For Insight
The Data Access Component (DAC) In Advanced Design System (ADS) – A Basic Example For Insight

A Simple Data Access Component (DAC) Example

 

 

Example 2)

Placing Ports For Surface Mount Components in ADS 

Defining/Placing Ports For Surface Mount Devices In the Keysight Advanced Design System (ADS) Simulator Is Not Always Obvious And Can Result In Poor Simulation Results If Not Done Correctly

Here Is A Simple Example Placing A Surface Mount Series Capacitor in A 50 Ohm Transmission Line

Placing-Ports-Correctly-In-Advanced-Design-System-ADS-RF-Simulator
Placing-Ports-Correctly-In-Advanced-Design-System-ADS-RF-Simulator

A Simple Momentum Port Placement Example

 

 

Example 3)

Simulate Curved RF Traces Correctly With ADS Momentum

Simulating Curved RF Traces Correctly With ADS Momentum.  Curved Traces exhibit parasitic effects (impedance changes) which can be very significant depending upon the frequency under consideration and the abruptness of the curvature.  Default ADS Momentum mesh settings are typically set up to achieve the fastest simulation results, not necessarily the most accurate simulation results.  For curved surfaces, you want to be sure to NOT use the ADS default settings to achieve the most accurate results.

Curved-RF-Traces-Not-Well-Meshed-Default-Advanced-Design-System-Settings
A Curved High Frequency RF Trace in the Keysight Advanced Design System ADS Momentum Electromagnetic Simulator

A Curved RF Trace…The Right And Wrong Way

 

 

Example 4)

Access Legacy Surface Mount Component Libraries in ADS

Access Legacy Surface Mount (SMT) Component Libraries in ADS – These Older Unsupported Libraries in ADS are still extremely useful.  But You have to Dig a Bit to Find them in the ADS Sub-Directories.  Using these older libraries will allow you to simulate using component S-parameters.  S-parameters will yield more realistic results than ideal components.

ADS surface mount library, S-parameters, simulation library, SMT component library
ADS Legacy Surface Mount Libraries. Even Though these libraries are fairly old, they still have many valuable components which will lead you to more realistic simulations by using S-parameters for components

Access Legacy Surface Mount Components in ADS

 

 

Example 5)

ADS Harmonic Balance Made Easier 

Harmonic Balance Made Easier – The Harmonic Balance Simulator Is a Powerful Non-Linear/Steady-State RF Simulator from Keysight but can be quite cumbersome to use at times…a simple up-converting mixer example should clarify some of the pitfalls and solutions associated with a basic Harmonic Balance non-linear simulation

Advanced-Design-System-ADS-Harmonic-Balance-Basic-Mixer-Example
Advanced-Design-System-ADS-Harmonic-Balance-Basic-Mixer-Example

Harmonic_Balance_Basic_Example

 

 

Example 6)

RF Budget Simulator in ADS

ADS RF Budget Simulator – Even though the ADS RF Budget Simulator is a legacy tool and no longer officially supported by Keysight, it is still a very valuable tool for non-linear and linear system analysis.  Some basic RF Budget Simulator examples provide insight

Example-Using-RF-Budget-Simulator-In-Advanced-Design-System-ADS
Example-Using-RF-Budget-Simulator-In-Advanced-Design-System-ADS

ADS_RF_Budget_Simulator

 

 

Example 7)

Intermodulation (IMD) Analysis Using The Harmonic Balance Simulator in ADS

Intermodulation (IMD) Analysis Using The Harmonic Balance Simulator – It is crucial to set “MaxOrder” and “Order” parameters correctly in Harmonic Balance in order to accurately capture ALL of the higher order non-linearities present in a non-linear simulation.  A basic power amplifier example makes this clear

A Harmonic Balance Simulator Spectrum - RF Power Amplifier In Compression - Intermodulation Terms
A Harmonic Balance Simulator Spectrum – RF Power Amplifier In Compression – Intermodulation Terms

Harmonic Balance Intermodulation Example