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got it. I opened one .s2p file with notepad. I admitted new parameters & resaved in notepad. Then changed the file extention to .s2p. The appcad recognises the file but RFSIM99 doesn't recognise it. The RFSIM99 recognise the original file but not created by me. The appcad recognises both the files.
How to solve this problem?
Nothing great I did, just removed the Tab/spacing on all the lines i.e
0.10 0.759 -43 16.992 148 0.004 54 0.896 -18
and the use one tab space between the dat points
it is thestandrad touchstone file format description....
Original file
! NEC Compound Semiconductor Devices Ltd.
! 20. August 2002
! NE85639E/2SC4093
! NPN Silicon Transistor
! Vce = 10 V Ic = 20 mA
# GHz S MA R 50
! f S11 S21 S12 S22
! GHz MAG ANG MAG ANG MAG ANG MAG ANG
0.10 0.759 -43 16.992 148 0.004 54 0.896 -18
0.50 0.478 -138 6.930 98 0.051 51 0.496 -29
1.00 0.459 178 3.728 75 0.081 57 0.398 -31
1.50 0.490 155 2.557 61 0.119 61 0.353 -39
2.00 0.512 139 1.951 49 0.160 63 0.326 -47
Modified file
! NEC Compound Semiconductor Devices Ltd.
! 20. August 2002
! NE85639E/2SC4093
! NPN Silicon Transistor
! Vce = 10 V Ic = 20 mA
# GHz S MA R 50
! f S11 S21 S12 S22
! GHz MAG ANG MAG ANG MAG ANG MAG ANG
0.10 0.759 -43 16.992 148 0.004 54 0.896 -18
0.50 0.478 -138 6.930 98 0.051 51 0.496 -29
1.00 0.459 178 3.728 75 0.081 57 0.398 -31
1.50 0.490 155 2.557 61 0.119 61 0.353 -39
2.00 0.512 139 1.951 49 0.160 63 0.326 -47
If you still have the problem just send all the files to me...I will help in fixing them...
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