I am trying to design a matching network for a power transistor at 1.25GHz, and I'm having some issues. I'm using Roger's TMM10i that's 75mil thick. Are there any issues at using thick substrates at 1.25GHz? Typically I see thin substrates being used, but I wanted to use the thick material to keep the line widths closer to component sizes at L-Band.
Your reason for using thick substrate is not reasonable. especially at L band there will not be a considerable loss if your line width is not same as your component size.
In my opinion use thinner substrates.
Your reason for using thick substrate is not reasonable. especially at L band there will not be a considerable loss if your line width is not same as your component size.
In my opinion use thinner substrates.
If you use a transmission line calculator as TX Line from AWR you will see that for the same dielectric, at high frequencies, using thicker substrate you get lower loss than using thinner substrate.
although this discussion is old one but if someone read it can u plz tel me how diid you calculate impedance from height and relative permitivty?any formula