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I contacted Keysight, They say ideal TLine don't have algorithm upper than 250GHz.
And they will correct this problem at next version of ADS.
Thank you for your help.
I'm sorry very late.
I tried many things for finding difference between HB and TRAN.
I checked other components.
R, C, L show same results.
But transmission line and transistor show differences.
I attach results of transmission simulation.
I made a very simple circuit for test.
This S21...
Thank you for your help.
i have some questions.
in your circuit, load R is very large.
because check output voltage, Open circuit setting ?
my goal is check demodulator's performance.
and i need amplfying before demodulating.
if i connect amp with demodulator(input R is 50ohm) instead load...
I revised circuit, but there is no change..
i simulate ideal BJT at TRAN and SP.
there is difference.
i change load's R, because matching.
why gain is different ? because SP is only small signal ??
i think active element make a difference between SP and Tran simulation.
and if i find...
I attached some result.
i tried to HB simulation again, i got different result but i didn't change anything ..
i don't know how i solve this problem..
there are current and voltage waveforms.
(HB result)
(SP and Tran result)
Hello.
I built a LNA at 300GHz.
so I got 21dB gain (S-Parameter simulation)
because i want to make a detector, i need a time domain graph.
but LNA didn't work.
so i sweep LNA at 50~400GHz, i got a graph attached.
why there is difference between SP sim and Tran sim ?
how i can solve this...
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