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Design >> RF Design >> s11 in receiver
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Message started by baohulu on Aug 10^th, 2015, 10:54pm

Title: s11 in receiver
Post by baohulu on Aug 10^th, 2015, 10:54pm

hi all,
in a receiver design, lna should be matched with the antenna, I want to know, in a design, how small s11 can be ? less than -20dB, -30dB, or ..... ?

Title: Re: s11 in receiver
Post by aaron_do on Sep 6^th, 2015, 5:42pm

At any one particular frequency, S11 can be very low (e.g -30 or -40), but over a bandwidth, usually -10 or so is considered acceptable as it means 90% or the power is transferred.

regards
Aaron