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183 Threads found on edaboard.com: s11 s22

## Cadence S-parameter analysis

Too easy, kindergarten level. >> r01=50; >> r02=100; >> s11=(r02-r01)/(r02+r01) s11 = 0.3333 >> s22=(r01-r02)/(r01+r02) s22 = -0.3333 >> Pa1=1/(4*r01); >> Pa2=1/(4*r02); >> Pload2=(r02/(r01+r02))^2/r02; >> Pload1=(r01/(r01+r02))^2/r01; >> s21=sqrt(Pload2/Pa1) s21 = 0.9428 >> s12=sqrt(Pload1/Pa2) (...)

## True Large Signal Differential Input Impedance Evaluation

I want to measure differential mode input impedance of true large signal differential driving. Target frequency is around 1GHz. How can I do this task ? I don't mean conversion from large signal single-ended driving like following. {s11, S12, S21, s22} -> {Sdd, Sdc, Scd, Scc}

## results do not match with datasheet

s22 looks much worse than s11 on top of the S21 mentioned by FvM. I would be very suspicious of something on the output (assuming your line is good 50ohms for 10GHz).

## How to get Log_Scaled Value of S-parameters in HFSS??

Hello Dear All, my question is how*to plot the Log Scaled Value of S-parameters in HFSS. I want to get*the value of s11, S12, S21 and s22 in log scale. I know how to plot normal S-parameters in units of dB, dBm , (real and imaginary parts) etc. But I need the log_scaled_Value. If anyone know it, Please help me to get the required values of S-

## Wrong HFSS Simulation result

Hi everyone I've simulated a coupled line band-pass filted using HFSS 2015. s11, s22, and S21 are reasonable and like my expectation, but S12 is irrationally deformed in passband. See below [url=obraz

## S11 & S22 Return Loss

What is the best frequency for a Point to Point connection based on this s11 / s22 Return loss graph? Insufficient data to make a selection. What is your signal BW? What are your regulatory restrictions? What is this a plot of?

## Inductive coupling power transmission

It is very general question to have details as S parameters have lot of details the point is what is important for you If we look as s11 and s22 the plots are not identical it means there is some directional element in the system like circulator. If we have a look at s11 it clearly indicates a very powerful resonance mode around roughly 2.4 (...)

## optimization in hfss

Sorry but your word optimization is very broad . S parameters define the behavior of RF Structure like for two port network s11 and s22 define the reflection at port 1 and port 2 and S12 and S21 define the transmission. All of these parameters are highly frequency dependent and frequency of any RF structure is dictated by parameters of structure. S

## How to plot touchstone files using matlab (Urgent, please help)

measured_data=read(rfdata.data, 'f150m_a.s2p'); s11_hid = smith(measured_data, 's11'); set(s11_hid, 'color', 'r', 'LineWidth', 2) hold on s22_hid = smith(measured_data, 's22'); set(s22_hid, 'color', 'b', 'LineWidth', 2)

## Find Scattering parameters from this picture

={s11, s12, s21, s22} I assume this is characterized by reference impedance=50ohm. s11_new=s11*exp(-j*2*(2*pi/lamda*lamda/8))=s11*exp(-j*pi/2) s22_new=s22 s12_new=s12*exp(-j*(2*pi/lamda*lamda/8))=s12*exp(-j*pi/4) (...)

## 6bit Attenuator Combining Problem

Hi, I am designing a 6 bit attenuator and facing a problem when I combined them together.Each bit individual work properly it achieved proper attenuation proper s11 and s22 but unfortunately when combined them together cant get required attenuation and s11 s22. Plz help me in this regard what will be the possible causes. T

## Sparam Inductor with HspiceRF

In the simulation, I get the following warning for different frequencies: "S parameters are not passive at (value of freq) Hz. Will be regarded as noiseless.No. If s2p is passive, |s11|**2+|s21|**2<=1.0 and |s12|**2+|s22|**2<=1.0 have to be satisfied. How do you get S-parameter for inductor

## S to RLGC in ADS (S2RLGC in MATLAb)

I have S-parametrs(s11,S12,S21,s22) for line in my topology - calculated in ADS "momentum", how I can get out of them "RLGC line parameters" in ADS ? (in MATLAB - "S2RLGC" function) ADS have: schematic->tools->spice model Generator-> Narrow Band Generator -> ***.S2P to Lumped PI-network model generate file in spice R1 1 0 10331.354

## S11 and S22 are very close to zero in LNA

Hi, I tried to have a LNA with the best value of performances for schematic and layout. The problem is that s11 and s22 are about -2 and -5 in the layout respectively. I know those values should be as negative as possible but I couldn't make a better values for them if I want to keep the gain high enough. Can you let me know if s11 (...)

## s21 and s12 parameter in lna

here all here i am designing current reuse lna in cadence and i got s11 = -24 db and s22 = 26db but s12 = s21 = -44 db what parameter should i change to get proper output at 2.4 Ghz at 0.18um technology

## 60GHz integrated amplifier design S22 problem

Your s11 is also too bad.. But your circuit has no impedance matching network ? How it will be improved ?? Check the intrinsic input and output impedances of the CasCode only first then apply proper matching networks to match to source and load.

## How to calculate Envelope Correlation Coefficient (ECC) in HFSS

Hi to all; I want to calculate the envelope correlation coefficient (ECC) for my 2x2 MIMO antenna. I have Simulated the antenna and got quite satisfactory (90%) results s11,s22, S21 or S12. Now I want to Calculate the ECC in HFSS using the S-Parameters. Is there any way to Calculate ECC in HFSS? How ECC can be plotted in HFSS? Please help me

## Simulation of two monopole antenna

Hello, i succed to simulate two monopole antenna in hfss but i dont understand the simulation results because i m beginner in hfss: The difference betwen s11, s22; S21 and S12; RF books will teach you about S-parameter. Guillermo Gonzalez, "Microwave Transistor Amplifiers, Analysis and Design, 2nd. Ed.", Pr

## Why best results of s21 and s11 don't occures in same frequency?

It can happen if you test jig is not calibrated with the Network ANalyzer. Poor quality cables and connectors can add phase shift and losses. Always use semi-rigid coax for better results. The s21 series insertion loss is related to the shunt return loss of both the input and the outputs, so the s11, s22 may have different Series and Parallel reso

## Can we edit dataset Values of dB in ADS2011

Is it possible to change S21 in dB, S12 in dB, s11 in dB, s22 in dB to our own values and generate equivalent Magnitude and Phase Values.Yes, it is possible. Export data as Touchstone, CITI or MDIF format. Then edit text data. And reload modified data.