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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Parameter Sweep in ADS by Keysight?

I am trying to create a Parameter Sweep in Momentum (ADS circuit layout simulator). Does anyone know how to do that? ADS offers options to create a parameter sweep during design but not during layout (...
Curious Cosmopolitan's user avatar
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How can I get a differential output as an input for another circuit on ADS?

I'm currently making a project on ADS for a differential pair oscilator: The desired output for this circuit is Vout2-Vout1.Now, I want to plug a buffer on this circuit, but I don't know how to ...
Gevezo's user avatar
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Fiber weave effect calculation for a PCB

How can I calculate the angle offset and maximum length? Here is my stack-up: You can consider my signal to be routed in layer 3. Please help in understanding the calculation and concept of it.
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How to plot standard deviation in Advance Design System (ADS) software?

I have measured several sets of data using a Vector Network Analyzer, and my data is in S-parameters format. How can I draw a standard deviation plot in ADS software based on my data?
Ferrofluid's user avatar
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Schematic Review: Interfacing ADS1299 with Seeed XAIO NRF52840 sense?

I need someone to review my schematic and guide me to fix the problems in the schematics. Need help reviewing the schematics. Can I power the ADS1299 with Seeed Xaio? If not, then how? I asked this ...
B L Λ C K's user avatar
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Is there a current limiting voltage source model in ADS?

I am currently using the below voltage source (VrPulse) on keysight ADS. but it is too ideal. Is there a model of current limiting voltage source I can use?
manny's user avatar
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How can I plot Vout for dual band RF Rectifier circuit design in ADS

How can I plot Vout for dual band RF Rectifier circuit design in ADS..when I am plotting the Vout graph, this is the graph I am getting
suraj s kumar's user avatar
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Combining touchstone s2p files into a higher order snp file

I only have access to a 4 port VNA and have a 5(or more) port device. I was wondering how can one export several s2p/s4p files to combine it in a sNp (N=number of ports). I understand the math behind ...
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Bias common mode and Impendence in relation to ASD1299

I was wondering if anyone would be able to help me understand the Bias common mode and Impendence in relation to ADS1299. If someone has a ADS1299 for dummies that would be great Thanks
danny's user avatar
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LC balun in ADS

I'm studying LC balun with bluenrg-1 now, and trying to calculator values in ADS simulation. But I find that the recommend circuit about this part in datasheet is different with what I have searched ...
Ming's user avatar
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ADS simulation and layout design

Can anyone explain to me what these dash-dot lines on my circuit design are? It happened when I generated the layout and changed it a bit, but I can't get rid of them. What are they indicating? Are ...
ARAZ's user avatar
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How to average 100 S2P parameters in Advanced Design System (ADS)

I measured 100 S2P parameters using a Vector Network Analyzer (VNA), and now I want to have an average of these 100 parameters in ADS. What should I do? Should I define the SnP parameter like below ...
Ferrofluid's user avatar
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1 answer
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Applying an electrical field to a particle in Ansys HFSS

Does Ansys HFSS have the ability to show the applied electrical field to a particle? I designed a coplanar wave guide in this software, something like in this video. Is it possible to put a particle ...
Ferrofluid's user avatar
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Question about two S parameter curves in ADS (Advance Design System) software

How do I subtract two S parameter curves and display the result? How do I do this for results from two different models in Advance Design System (ADS) software?
Ferrofluid's user avatar
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Amplitude shift keying using NMOS cascode transistor configuration

. I am using 50 MHz as a carrier signal and a pulse signal as the data signal. Unfortunately, I could not get my desired modulated ASK signal. I am using ADS software. Kindly guide me on how to do it. ...
Naqeeb Ullah's user avatar
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118 views

Trouble importing encrypted LTSpice model in to ADS

I'm new to ADS. I've outgrown what is practical to accomplish in LTSpice though. I have a diode that I need to do a load-pull and source-pull analysis on in a high frequency domain. I've worked with ...
timbojames's user avatar
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1 answer
122 views

Cascode amplifier does not provide gain properly

I'm trying to build a Cascode amplifier on ads but I think I have a problem with my tank oscilator. Here's the complete circuit The inductor is an air-core inductor from coilcraft and the transistor ...
Gevezo's user avatar
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No DC convergence issue

I am simulating a circuit consists of a clock, a NMOS, and a D flipflop. I wonder why it gave me the error no DC convergence? How should I fix it?
kintaro's user avatar
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2 votes
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ADS simulation error when inputting a clock in to a D flip-flop through an NMOS switch

A NMOS gate controls when the clock signal is fed into the clock of the D flip-flop. Below is the NMOS gate schematic and simulation. As we can see, the Vsquare only goes through the NMOS when the ...
kintaro's user avatar
  • 327
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1 answer
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Time step error after placing connection between component and transmission lines - ADS

I have recently created a project in ADS. It contains a couple of transmission lines, capacitors, and resistors. When I connect my transmission lines to the s2p file, transient simulation is done ...
mohammad rezza's user avatar
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2 answers
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ADS-syntax parser error in `<ADS netlist>', line xx: syntax error

I have the problem with ADS when I am simulating my schematic design. Here is the error message: ...
mohammad rezza's user avatar
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158 views

How to modify s2p file of an IC? - ADS

I have a s2p file of a RF IC which it contains frequency from 650 MHz to 1.1 GHz. I wish to modify s2p model so that two frequency 0 Hz and about 3.5 MHz is added to the s2p file. How can I do that ...
mohammad rezza's user avatar
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593 views

Internal timestep 2.45482e-13 too small at time 5.73394e-13 - ADS error

I want to do transient simulation in ADS. But I encountered with an error shown completely in the following message: Simulation message: ...
mohammad rezza's user avatar
-1 votes
2 answers
185 views

Dual directional coupler schematic?

I am new to microwaves. I am trying to design a dual directional coupler using ADS software, but researching dual directional coupler isn't working; all that's showing is directional couplers and bi-...
Charbel Eid's user avatar
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1 answer
169 views

Unexpected result when using RF pulsed generator in ADS

I am simulating a simple test circuit including an RFpulsed generator in ADS, but the simulation gived some surprising result. I have attached my test circuit schematic in the attachment. Moreover, I ...
mohammad rezza's user avatar
0 votes
1 answer
314 views

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 ...
Anice41's user avatar
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190 views

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 ...
kintaro's user avatar
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253 views

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 ...
kintaro's user avatar
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30 views

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?
chu se's user avatar
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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 ...
kintaro's user avatar
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2 votes
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316 views

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?
Nimasha Pilippange's user avatar
3 votes
1 answer
2k 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: ...
michaelgr22's user avatar
2 votes
0 answers
72 views

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 ...
Aldrich Taylor's user avatar
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108 views

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 ...
Richard Závodný's user avatar
0 votes
1 answer
343 views

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 ...
Saunders's user avatar
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2 answers
142 views

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 ...
dirac16's user avatar
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1 vote
1 answer
1k views

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 ...
zoe20's user avatar
  • 13
0 votes
2 answers
878 views

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 ...
zoe20's user avatar
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0 answers
192 views

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 ...
osama afzal's user avatar
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0 answers
55 views

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.
sajib sn's user avatar
0 votes
1 answer
59 views

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.
sajib sn's user avatar
1 vote
1 answer
246 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 ...
Aldrich Taylor's user avatar
0 votes
0 answers
108 views

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.
sajib sn's user avatar
0 votes
0 answers
249 views

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 ...
Anice41's user avatar
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47 views

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.
sajib sn's user avatar
3 votes
0 answers
186 views

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 ...
BY Jiang's user avatar
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0 answers
650 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 ...
John Jin's user avatar
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0 votes
1 answer
166 views

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 ...
Henry Nguyen's user avatar
1 vote
2 answers
351 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 ...
Jakov Sergo's user avatar
0 votes
1 answer
185 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 ...
Kingsley Ijike's user avatar