作者already310 (龘)
看板comm_and_RF
标题Re: [问题] 关於RFIC设计的问题
时间Wed Jun 13 00:03:55 2012
※ 引述《dlh (小金牛)》之铭言：
: In LNA design,it is typically found that frequency of the S11 dip does not
: agree with that of the S21 peak.Could you research on why it appears so and
: if you can improve?
: 小弟苦思许久 还是找不到为何有如此现象
: 请教 板上大神
: 有人可否解答
小弟爬文发现到这个问题
看推文说是跟noise match 和conjugate match有关
不过google还是没甚麽头绪
想请问有人能解惑一下吗?
谢谢
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 220.132.98.155
※ 编辑: already310 来自: 220.132.98.155 (06/13 00:05)
1F：推 ioioeoeo:S11最低点<=>Zin最接近50ohm的点180.177.124.207 06/13 22:42
2F：→ ioioeoeo:S21peak <=>Zin最接近conju. match的点180.177.124.207 06/13 22:43
3F：推 ioioeoeo:若设计中心频率时是conju m.则上述发生在180.177.124.207 06/13 22:48
4F：→ ioioeoeo:同一频率180.177.124.207 06/13 22:48
5F：→ ioioeoeo:但LNA输入端在中心频率是设计在noise匹配180.177.124.207 06/13 22:48
6F：推 cwfy:因为工程师不够强!没tune好 61.70.236.206 06/13 23:06
7F：→ already310:谢谢 220.132.98.155 06/14 21:35