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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Transient Simulation - ADS

I'm facing a doubt in transient simulation in ADS. In many setups I've seen placing a resistor in series to the transient voltage step generator. Placing the series resistor, and simulating the below ...
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Error with creating a equation in ADS with the variable already defined on the schematic as Var

I am trying to create a equation to plot the eye diagram from the voltage node Vout As I define the equation, it tells me that the "Tbit" is not defined!? I wonder why because I have already ...
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Issue with Eye Diagram in ADS

I am simulating eye diagram in ADS using the below setup The schematic is drawn following the ADS manual After simulating, I tried to plot the eye diagram using Density This is what I get but it is ...
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How to define an end point for VtPluse in ADS

Generate voltage pulses using VtPulse in ADS. It creates a stream of pulses defined. Now I am thinking how to end it? for example if I want to stop this pulses at 1u sec. How should I do it?
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NMOS in ADS for proper simulation

How do I simulate a proper NMOS in ADS? I just given the width and length of the NMOS. what else are the parameters I need to provide?
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Difference between Harmonic Balance and Transient solver in ADS

I am performing a simulation of a half wave rectifier (HWR) in ADS. I had developed a MATLAB code for Harmonic balance solver and Transient solver in MATLAB. The code gives comparable results when ...
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How do I create a nmos on ADS

I want to create a pmos using ADS. What parameter values should I give be besides the Length and Width? also what gate voltage I should give to turn the mosfet on in this case?
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How to plot the reflection coefficent at the load against frequency in ADS

The reflection coefficeint at the load is defined as how do I plot the load reflection coefficent against frequency in ADS? it is easy to plot the source reflection coefficient since it is just ...
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How can I graph the bias voltage vs capacitance in ADS?

I am trying to model a bias tee and control the capacitance of the varactor by varying the voltage. How do I plot the voltage vs capacitance/charge in a graph in ADS using AC simulation?
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PI simulation in PathWay ADS

I am trying for Power Integrity testing for a computing module which uses two Buck converters, whose output goes through a VC sensor measuring the power on each line. The VC sensor uses 2mOhm ...
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309 views

I2C Connection with ADS1115 not working

I have trouble by setting up an I2C connection between ESP32 NodeMCU and ADS1115 (datasheet). Wiring: I'm using the below example code from Adafruit: ...
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Keysight ADS User-Defined Models to AWR/Virtuoso

everyone! In ADS Keysight it is possible to create a model - the so-called User-Defined Model. This is C++ code that describes the Y-matrix of the component. Is there the same possibility in AWR ...
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ADS MRSTUB issue

I am using ADS to add a MRSTUB to my design, however when I try to simulate it there is error as indicated below anyone knows what is going on?
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ADS cursor: set the S(1,1) to determine frequency

I am using ADS to simulate S parameters. After adding the cursor, I can click the freq and change its value, the S(1,1) value will change accordingly. Now I want to do the other way round, changing ...
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De-embedding ceramic filters

I want to design a diplexer using two ceramic filters. S2P files of the filters are not provided. Therefore, I designed a PCB which can be shown below to obtain their S2P parameters. In the first ...
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PIC18F25K50, ADS1114 and I2C

I have a minor problem here. I am programming a board with PIC18F25K50 on which I also have three ADCs (ADS1114 from Texas Instruments) for three loadcells. It is a HID device, I have the USB part ...
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ADS Gives Negative Input Impedance in Transmission Line Simulation

I am trying to get a very simple transmission line input impedance simulation right in ADS, but the result gives a negative real part of the impedance. This should be impossible. Any advice on how to ...
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Trying to draw the schematic for a power divider circuit

I want to draw both the schematic and layout for the following power divider circuit using microstrip lines in ADS. First of all I want to see if my schematic agrees well with theoretical results at ...
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ADS Simulation of IV Diode Characteristics

I’m still quite new to ADS, and I’m trying to get a simple simulation of the IV diode characteristics. I want to plot the diode current against a DC sweep from -0.2V to +0.2V Here’s what I’ve got so ...
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ADS Simulation of Half-Wave Rectifier

I’m trying to simulate a half wave rectifier for a -84dBm 2.4GHz AC signal. The rectifier doesn’t seem to be giving me the correct waveform - the negative half cycle isn’t blocked? Also sort of ...
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Modulator design in ADS

hello everyone editing my previous post, i have biased my circuit now i want to run it for s-parameters simulation but when i attach term port it is giving a negative S(1,1).. any help would be ...
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How to find the distance between two arms of a hairpin resonator?

In this picture I want to find the value of W_cap(the distance between two arms of hairpin resonator). I have the length, width, quality factor and coupling co-efficient of the resonator.
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I need help with hairpin filter design. Can anyone help me with the design steps and equations? [closed]

I have the coupled line design. But don't know how to convert it to a hairpin structure.
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102 views

Modelling a non-linear resistor on ADS

How can I model a non-linear resistor whose current changes according to the equation shown below on Advanced Design System (ADS) or AWR Microwave Office? $$i(t)=v-v^2-v^3$$ Where v is voltage ...
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How to implement this design in ADS(Advanced Design System)?

I was trying to implement this design in ADS. I have used coupled lines with all the dimensions but didn't get the expected result. Can anyone instruct any better way.
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Negative drain current in FET

I am new to electronics simulation. I am currently simulating a simple FET where I sweep both the gate and drain voltages. When I plot the drain currents for low values of the drain voltage I obtain ...
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How to provide gap between two separate structure or microstrip lines in ADS(Advanced design systems)?

I want to provide gap between two resonators. Here is an image. How do I provide those gap M12 and M23.
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ADS (Advanced Design System) Simulation to fit experimental data

I am a noob on ADS software. I was just wondering, if I have a given set of measurement data like the following: And I know a equivalent RLC circuit model for my device, from literature. How do I ...
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195 views

How to simulate commercial Double Balanced Mixer in ADS

I need to simulate ADE-1 from the Mini-circuit in ADS. I use this circuit simulation in ADS. . My RF source (P_1Tone) and Lo source, in reality, generate a 2dBm and 10dBm sinewaves. However, in ...
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Simulation problem

I'm a new user to ADS (Advanced System design). I'm trying to design a discrete Colpitt oscillator at 100 MHz in ADS. Here's my schematic: Now I wanna check if my circuit works properly. I watched ...
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204 views

Transimpedance amplifier simulation acting weird

So, I have been trying to simulate this low input current transimpedance amplifier, but I am just not getting results I was expecting. So to explain the circuit in short, I will be working with ...
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106 views

ADS AEL: operand: ee_boolparameter value required whenever I try to compare voltages

I'm not very experienced with Keysight's Advanced Design System. I am trying to use the if statement in my user-defined function to compare two volage values and ...
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Cannot permute invalid or irregular data

I am trying to run a simple simulation for an NFC (Near Field Communication) system using a mutual inductor component to connect two coils. I have written a simple formula for the coupling factor <...
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447 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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1 answer
1k 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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132 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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536 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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1 answer
584 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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68 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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450 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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800 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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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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98 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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725 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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1 vote
2 answers
720 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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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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636 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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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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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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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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