I'm trying to match the output end of a 2.5GHz LNA, but when i calculate the Rout to determine what kind of match structure to use, i find the output R is -0.504-i0.057 ...! the chip i'm using is ATF34143. what should i do then:?:
Re: what if the Rout is negative when matching the LNA's out
Hi
It is impossible to match positive 50Ohm and negative resistance (with out loss of gain). You need modify lna circuit. (Optimize source feedback for ex..)
Re: what if the Rout is negative when matching the LNA's out
pelican said:
sorry to bother, i'm a newbie in this field.
I'm trying to match the output end of a 2.5GHz LNA, but when i calculate the Rout to determine what kind of match structure to use, i find the output R is -0.504-i0.057 ...! the chip i'm using is ATF34143. what should i do then:?: