dopradar
Member level 5
Hi all,
Recently I am designing a LNA work at L band ( from 900 to 2200MHz), the structure is shown as LNA.jpg.
It's gain and NF are good. S-params is shown as following:S11.jpg, S21.jpg, S12.jpg and S22.jpg.
but when I test the linearity, a problem occurs. at 900MHz IIP3 is 2dBm, but at 2000MHz IIP3 is 14dBm, the difference is so large, so what's the reason? how to sovle this problem?
Thanks a lot!
Recently I am designing a LNA work at L band ( from 900 to 2200MHz), the structure is shown as LNA.jpg.
It's gain and NF are good. S-params is shown as following:S11.jpg, S21.jpg, S12.jpg and S22.jpg.
but when I test the linearity, a problem occurs. at 900MHz IIP3 is 2dBm, but at 2000MHz IIP3 is 14dBm, the difference is so large, so what's the reason? how to sovle this problem?
Thanks a lot!