Questions tagged [ads]

Advanced Design System (ADS) is an electronic design automation software system. It provides an integrated design environment to designers of microwave and RF electronic products.

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Extracting specific points from parameter sweep

Simulation Setup I'm trying to extract some specific data points from an S-Parameter simulation with a Parameter Sweep in ADS. I have a simple resonant circuit: For this simulation I have the ...
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29 views

GaN model in ADS (Advanced Design System) from datasheet

I would like to ask if anyone knows how to create an accurate model of a GaN RF transistor in ADS using information provided by the datasheet. Is it possible to obtain large signal information for a ...
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37 views

Design and simulation of cross coupled oscillator in ADS

I am currently designing a low power consumption and low phase noise VCO in ADS. But while performing the transient response I'm not getting the oscillating waveform in the output. I have attached the ...
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1answer
72 views

How to Model a Bias Tee in ADS

I'm modeling a Bias Tee in ADS and I wanted to ask how to add board parasitics into the model and what should the results of a good model look like in terms of the S-parameters. This is my first time ...
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47 views

Difficulties simulating transimpedance amplifier

I am developing a transimpedance amplifier as an assignment for a faculty course and I am running into problems when trying to simulate my circuit in ADS Keysight, even though I am quite sure how my ...
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35 views

Marchand balun layout

For this marchand balun schematics in ADS, how to instruct the ADS layout generator to use coil shape (for area saving in IC) ? Besides, anyone have any experience with planar layout of marchand ...
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34 views

How to import a .csv file into ADS?

I'm using ADS2006A version and I'm trying to plot an eye diagram. However, I need to import a .csv file into ADS first because I did the simulation in Matlab. While importing, it asks for pattern ...
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1answer
129 views

Unexpected loadline in ADS simulation

NOTE: This question is related to a homework project. I’m designing a PA for the 850-880MHz band. We have quite a lot of freedom for doing that. Only two requirements are specified: The amplifier ...
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1answer
25 views

Microstrip circuit Simulation

How can I simulate the below circuit to show its transmission coefficient? I have developed the circuit as in the diagram but what is missing to view the transmission coefficient?
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1answer
70 views

Difference between a circuit developed using lumped elements and microstrip elements (transmission line)

As the title implies, what is the difference between lumped elements and microstrip elements? According to my understanding lumped elements are discrete elements but I don't understand what is the ...
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1answer
108 views

Measure impedance of rectifier using harmonic balance in ADS software

I am trying to use harmonic balance to find the impedance of the voltage double rectifier. After finding the impedance, I will use the impedance matching tool to find out the L matching. As the ...
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28 views

Realizing a prototype filter in ADS or any other simulator

I'm trying to design a stub-filter, and I'm stuck on realizing the filter design using Richard's transformations and Kuroda identities. I'm building a 5th order Chebyshev LP-filter for 2.6 GHz pass-...
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25 views

ADS harmonic balance discrepancies with sawtooth waveform

I am using ADS for a simulation where I am biasing a diode with a sawtooth waveform. The sawtooth source provided by ADS, and 3 harmonics are specified There are different phase delays across the ...
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1answer
46 views

ADS Simulation: Schematic to find input impedace

I'm following a paper, using ADS, to find the input impedance of a shunt Schottky diode. The paper's schematic is Fig. 1, and my schematic is Fig. 2. The point is that, I could not get the same result ...
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1answer
42 views

Cosimulation Error on Advanced Design System

I want to use BLF2425M9LS140, Power LDMOS transistor, to do cosimulation on ADS. I have got transistor's PCB design from its site and have done required procedure but when I try to convert layout to ...
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1answer
234 views

Export Gerber File from Keysight ADS and import in Eagle

Hello, I want to import my microstrip patch antenna design from ADS into my Eagle-Board-View. Therefore I exported a Gerber-File, which looks good in the Gerber-Viewer. Inside Eagle, i used Gerber-...
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2answers
306 views

How does SPICE calculate Drain current of a MOSFET model?

I am trying to use a MOSFET model for constructing transistor level circuits in ADS. (For instance, an amplifier). I saw that we could import transistor libraries from various locations (https://www....
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1answer
117 views

Difference between conventional Eye-diagram voltage plot and “Eye-density” plot in ADS Keysight Simulation

I know what is eye diagram. It is the sampled voltage plot at the clock frequency (Usually) of my circuit and superimposed. If the logic 0 corresponds ...
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2answers
245 views

What does it mean if eye diagram voltage (0 and 1 level) goes negative?

I have created a differential channel and was testing the channel with simple testbench to check the eye diagram. Now I know the channel performance is very bad (It of several PCB transmission lines, ...
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1answer
20 views

Choosing the right parameters for a Pulse wave simulation in a CAD schematic

I'm trying to choose the right parameters in the simulation in order for the output to show a square wave of gain C1/C2 = 2V Anyone know what I'm doing wrong? Thanks.
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2answers
218 views

How to create an OOK signal in ADS

I'm trying to make an OOK modulated signal in ADS. I need a random bit generator, and a block to multiply a sinusoidal signal with that random pulse. I did this in Cadence by the 'rand_bit_stream' and ...
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2answers
55 views

Help using Load Pull in ADS

I'd like to ask for some help with performing a Load Pull simulation in ADS. I tried using the DesignGuide utility but am not sure how to connect the Load Pull Instr shown in the attachment and which ...
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1answer
116 views

Question regarding components in Advanced Design System

I am trying to use ADS to create the scheme of an amplifier which includes the following elements B1: Description = 100 MHz Short Ferrite Bead, Surface Mount Part Number = 2743019447 Manufacturer =...
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1answer
225 views

Adding ripple to a voltage signal in ADS

I'm simulating an FMCW radar in ADS and to control the VCO I use a ramp generator. I tried the ideal case, now I want to add a ripple to my ramp voltage so I can analyze the effect of a ramp voltage ...
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2answers
349 views

load pull in ads

I am trying to do a load pull simulation using ADS for push pull FET power amplifier . First I used the ADS one tone palette to simulate one of the FET's: Then I found the optimum input and output ...
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1answer
120 views

Why does my ADS simulation provide no gain?

I am utilizing the following spice model for a BS170 MOSFET: * *Zetex BS170P Spice Model v1.1 Last Revised 3/5/00 * .SUBCKT BS170P 3 4 5 D G S M1 3 2 5 5 N3306M ...
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1answer
262 views

What exactly are terms in ADS? [closed]

I have been using them to simulate my s-parameter tests, but I'm not sure what they are exactly. Are they simply some impedance that simulates an infinite transmission line?
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1answer
100 views

Different isolation when switching port calibration type

I have designed a directional coupler in ADS, and when simulating it in Momentum, I realized that depending the type of port calibration (checked on Calibration TML and Calibration None) the isolation ...
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279 views

How can I create a varicap in ADS?

I need to create a varying capacitor, so I'm trying to make a varicap in ADS. However, there are only diodes, and I don't know how to make a varicap. Can you point me to some resources or walk me ...
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96 views

In ADS, why am I getting such a strange output when sweeping a variable and graphing it?

I am trying to get the gain of this circuit vs. capacitance. Here is a screenshot of my circuit and results. Why is the result behaving like this? It should just be one line. Why are there so many ...
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1answer
641 views

In ADS, how do I vary capacitance values of a capacitor in my circuit and plot the transfer?

I want to see how the transfer function behaves as the value of a capacitor changes. I've currently set up some s-parameters and a parameter sweep, but I'm not quite sure how to get it to work. Am I ...
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1answer
763 views

In ADS, what's the difference between a Parameter Sweep and Sweep Plan?

I want to plot the transfer function/scattering parameter of a circuit with a varying capacitance. Which one would I use, and what are their differences?
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1answer
88 views

In ADS, what are the differences between the lumped components and the lumped component models?

I'm trying to put in some ideal inductors and capacitors into my schematic, but there are two options: "Inductor" and "Inductor Model". What are the differences between the two?
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2answers
622 views

What is a reference frequency for electrical length?

There is an option for the transmission lines in ADS which says "Reference Frequency for Electrical Length" What is that supposed to be? In the transmission line equations, I don't know of any ...
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1answer
433 views

In ADS, how can I change the electrical length on a transmission line to depend on the frequency sweep?

I'm setting up an S-Parameter test on a transmission line, but I want the electrical length to change and depend on the frequency. How can I go about that? The variables that I can put in are all ...
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1answer
2k views

How can I set up a transmission line in ADS?

I'm in the palette section with TLines-Ideal. I'm confused about what all these options mean, for example "terminal transmission line" Where is the part for me to draw the transmission line and ...
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1answer
77 views

Harmonic simulation of microwave power amplifiers

I am working on microwave power amplifier design for 2.45 GHz, 300 W using LDMOS (part no.:MHT1004N). I am using Agilent's ADS for the simulations. I want to know what exactly is harmonic balance ...
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1answer
167 views

Grounded Coplanar - Impedence calculation of microstrip - Advance Design System software (ADS)

I want to calculate the impedance of the micro-strip using Advance design system (ADS) software. I cannot locate "GROUNDED CO-PLANAR" or anything like that. I am new to this software. Can anybody help?...
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1answer
289 views

How to extract ADS marker information to matlab?

I am new to ADS software and I want to extract marker values to MATLAB. Is there any efficient way to do that? For example,
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1answer
246 views

Keysight's Advanced Design System users, what's wrong with this simulation - II [duplicate]

As requested, I am forking a question as continuity to my previous inquiry from: Keysight's Advanced Design System users, what's wrong with this simulation? As such, this is not a duplicate. ...
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341 views

Keysight's Advanced Design System users, what's wrong with this simulation?

For those of you that uses Advanced Design System (ADS), from this circuit: Fundamental Frequency for transient simulation tool is set to 1GHz. Yet, I'm getting this output: Main question: Since ...
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1answer
452 views

How to do theoretical calculation of S parameters

I created a test bench for bond wire in ADS EM simulator and got the following graph in the picture I attached. I'm trying to compare the values which I got in ADS with theoretical one. But I'm ...
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1answer
648 views

Wideband impedance matching to an LNA with varying impedance over frequency

What's the general design procedure for trying to do a wideband impedance match to a device (in this case an LNA) which has very frequency-dependent impedance? As a personal project, I'm trying to ...