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https://designers-guide.org/forum/YaBB.pl Simulators >> Circuit Simulators >> Ideal transmission line in Cadence https://designers-guide.org/forum/YaBB.pl?num=1264561027 Message started by gocoba on Jan 26th, 2010, 6:57pm |
Title: Ideal transmission line in Cadence Post by gocoba on Jan 26th, 2010, 6:57pm Hi there, I have a question, is there an ideal transmission line model in Cadence like TLine in ADS? ADS has ideal Tline models and I use them to get the electrical length values I need. Then I use some EM software like Sonnet, etc to model my lines to get as close a match as possible to the ideal line electrical length and characteristic impedance values. So, just wanted to know if there is ideal one in Cadence. Thanks!! Albert |
Title: Re: Ideal transmission line in Cadence Post by pancho_hideboo on Jan 26th, 2010, 7:20pm Use "analogLib/tline". See http://www.designers-guide.org/Forum/YaBB.pl?num=1231344965/1#1 |
Title: Re: Ideal transmission line in Cadence Post by gocoba on Jan 27th, 2010, 5:13pm Hey thanks!! But I have a question of setting up these parameters in Tline. Suppose I have a line with 30 degree at 60GHz, suppose there is no delay time (ideal line only), what should I set for physical length? 30/360 * lamda = 1/12* 3e8/60e9 = 420um? I dont have to consider dielectric constant since this is a perfect line, is that correct? Also, what is the normalized length? the default is 0.25, does that mean it is set to be a quarter wave TL? Thanks a lot in advance! |
Title: Re: Ideal transmission line in Cadence Post by pancho_hideboo on Jan 28th, 2010, 3:25am gocoba wrote on Jan 27th, 2010, 5:13pm:
gocoba wrote on Jan 27th, 2010, 5:13pm:
beta=2*pi/lamda, theta_rad=30/180*pi, Length=theta_rad/beta=30/180*pi*lamda/(2*pi)=30/360*lamda gocoba wrote on Jan 27th, 2010, 5:13pm:
However "dielectric constant" is considered as wavelength or wave velocity equivalently. gocoba wrote on Jan 27th, 2010, 5:13pm:
Read message of "spectre -h tline" surely, before posting questions. |
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