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yes, my problem is solved. you have to be careful with the time-duration you allow the simulator to run. Therefore, use sufficiently large time span to allow heating and cooling e.g. use 60e9 for 1min real situation if your unit scale is set is nanosec.
Hi,
I wanted to evaluate heat/temperature distribution on a ceramic substrate, bearing some MW integrated circuits, structures, and DC lines. The temperature distribution due to DC and MW signals can be seen with a MW and thermal co-simulation and looks fine to me.
The DC and MW signals pass...
CST displays phase with wrap/unwrap by default which can be turned off by un-checking this property when you will go to the plot properties.
However, in CST2012, unlike its predecessor straight forward function to get phase of S21 is not possible, like we normally do in ADS etc.
May be you can...
Hi,
I am trying to open ADS2011 project (new way is to save in workspace) in ADS2009 (old way is to work with project).
It looks this way is not backward compatible and I am not able to open a project from 2011 to 2009 but the reverse is OK.
Can someone share his experience?
regards,
saqib
Thanks and appreciation for enjunear for sharing his reply.
Actually, this problem could easily be solved by using following forumula derived from two-port network theory.
R=50*2*(1/abs(S21)-1)
50 is only a normlization factor.
regards,
saqib
Is it possible to compute equivalent resistance at a particular frequency from given reflection and transmission coefficient?
S11 -33.062dB
S21 -0.049dB
f 1GHz
delay @1GHz 56.53psec
regards,
saqib
Hi,
I have been using two bond-ribbons to connect XYZ-chip to my dp951 LTCC module, which worked fine within limits. However, now when I tried to use only one ribbon, I am facing some problems.
First the chip is manufactured with 40Ohm I/O impedance (found from measurements) while my desire is...
Re: Simulation result, CST vs ADS
The two results differ simply because the use two different EM simulation techniques. ADS MoM based on 3D planar EM technique considers substrate of infinite height while the real 3D FIT EM technique is the core kernel of CST.
I would say either you use HFSS or CST, it doesnot yield a lot of difference in results. However, working with ADS, you should specify whether you used Analytical Models or Momentum designs. The Analytical results (if not properly taken into account other effects) are far from the results you...
Hi,
Is it necessary to have similar S11 parameter of a 50Ohms Microstrip line if simulation is setup correctly in either CST, Mom or using ADS Analytical Models.
My observation suggest the Analytical results to yield the best S11 curves, then MoM and then CST. But the behavior should nearly be...
ook noncoherent
Now I think, you got my idea. The AWGN BER should be the lower limit of the simulated test bed.
I used following equations for different situations:
PPM coherent : Q[sqrt(Eb/N0)]
OOK coherent : Q[sqrt(0.5*Eb/N0)]
PPM non-coherent: 2Q[sqrt(Eb/N0)]
OOK non-coherent...
you easily definitions of theoretical
|TX|->|TxFilter+ |->|RxAntenna+|->|Receiver|
|TxAntenna| |LowNoise Amplifier|
|Channel+ | |RxFilter |
|Noise + Interfernce|
I have the same assumption like you made.
I think lower bound is necessary only to...
error probability ook
Actually, the equation you suggested me, seems to provide logical result for comparison purposes. But it generates another argument. The transmission of PPM using same pulse of amplitude A should also provide error probability equation as Pr=Q(Eb/N0).
Does it mean both...
ook ber
the ~3dB is due to the presence of real hardware components including multipath channel, tx and rx filters, low noise amplifiers and antenna gain patterns etc. so not a pure awgn cjannel and so will always have some implementation loss. (my thought)
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