ayhz2002
Member level 3

serenade simulateur
hi:
I would like to know the difference between using the ideal transmission lines (electrical) and the microstrip transmission lines (physical) in serenade.
I used the electrical lines and I got S11 = -3.96 dB (based on mismatched input), S21 = 6.96 dB (out of 7 dB) and S22 = -44 dB.
With physical lines, I got S11 = -4.91 dB, S21 = 7.22 dB (bad) and S22 = -17.56 dB
I put the substarte media (microstrip) with Er = 2.2, tanD = 0.0009 and H = 0.78741mm (using RT/Duroid 5880). Also the copper thickness
(34 um)was given but I didnot include it in the substrate media. i tested it once with the copper thickness and i got almost the same results. Are there anything else goes in the substrate media?
Can I know why the results are different?
frequency was 5.5 GHz using BJT. width of trasmission lines was 2.43 mm and lembda = 3.987 cm, Eeff = 1.871
In fact, the expected results (from theory) match those of the electrical lines.
thanks
ayhz2002
hi:
I would like to know the difference between using the ideal transmission lines (electrical) and the microstrip transmission lines (physical) in serenade.
I used the electrical lines and I got S11 = -3.96 dB (based on mismatched input), S21 = 6.96 dB (out of 7 dB) and S22 = -44 dB.
With physical lines, I got S11 = -4.91 dB, S21 = 7.22 dB (bad) and S22 = -17.56 dB
I put the substarte media (microstrip) with Er = 2.2, tanD = 0.0009 and H = 0.78741mm (using RT/Duroid 5880). Also the copper thickness
(34 um)was given but I didnot include it in the substrate media. i tested it once with the copper thickness and i got almost the same results. Are there anything else goes in the substrate media?
Can I know why the results are different?
frequency was 5.5 GHz using BJT. width of trasmission lines was 2.43 mm and lembda = 3.987 cm, Eeff = 1.871
In fact, the expected results (from theory) match those of the electrical lines.
thanks
ayhz2002