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.
85
questions
1
vote
1
answer
51
views
How to Accurately Simulate a Wideband Bias Tee in LTSpice?
I'm currently working on designing a wideband bias tee and have been using LTSpice to simulate its performance. However, the results I'm obtaining seem too good to be true, and I'm concerned there ...
- 11
0
votes
0
answers
148
views
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 (...
1
vote
0
answers
27
views
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 ...
- 113
0
votes
0
answers
57
views
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.
- 21
1
vote
0
answers
21
views
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?
- 11
0
votes
0
answers
87
views
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 ...
- 101
0
votes
0
answers
137
views
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 ...
- 1
0
votes
1
answer
101
views
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 ...
- 11
0
votes
1
answer
68
views
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 ...
- 11
0
votes
0
answers
77
views
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?
- 11
0
votes
0
answers
90
views
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. ...
0
votes
0
answers
173
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 ...
0
votes
1
answer
140
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 ...
- 113
1
vote
1
answer
408
views
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?
- 347
2
votes
0
answers
107
views
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 ...
- 347
0
votes
1
answer
496
views
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 ...
- 442
0
votes
2
answers
3k
views
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:
...
- 442
0
votes
0
answers
198
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 ...
- 442
0
votes
0
answers
754
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:
...
- 442
-1
votes
2
answers
290
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-...
- 17
0
votes
1
answer
261
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 ...
- 442
0
votes
1
answer
451
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 ...
- 95
0
votes
0
answers
281
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 ...
- 347
0
votes
0
answers
345
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 ...
- 347
0
votes
0
answers
33
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?
- 1
0
votes
0
answers
176
views
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 ...
- 347
2
votes
0
answers
396
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?
3
votes
1
answer
3k
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:
...
- 45
2
votes
0
answers
75
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 ...
- 175
0
votes
0
answers
123
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 ...
0
votes
1
answer
412
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 ...
- 526
0
votes
2
answers
170
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 ...
- 1,804
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 ...
- 13
0
votes
2
answers
1k
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 ...
- 13
0
votes
0
answers
243
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 ...
0
votes
0
answers
56
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.
- 1
0
votes
1
answer
67
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.
- 1
1
vote
1
answer
290
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 ...
- 175
0
votes
0
answers
123
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.
- 1
0
votes
0
answers
284
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 ...
- 95
0
votes
0
answers
57
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.
- 1
3
votes
0
answers
234
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 ...
- 31
0
votes
0
answers
769
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 ...
- 167
0
votes
1
answer
175
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 ...
- 67
1
vote
2
answers
422
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 ...
- 11
0
votes
1
answer
209
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 ...
- 101
0
votes
1
answer
126
views
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 <...
- 101
1
vote
0
answers
730
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 ...
1
vote
1
answer
2k
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 ...
1
vote
0
answers
442
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 ...
- 535