[amsat-bb] LNA + SAW filter limiter question

Hans BX2ABT hans.bx2abt at msa.hinet.net
Tue Aug 14 03:45:33 UTC 2018


I'm still experimenting with PGA103+ LNAs. I want to add a SAW filter 
(70 cm) behind the LNA, but I see in some designs that in order to 
protect the filter they use a diode limiter, e.g. the SKY16602-632LF. 
That one uses an MLP package which you can only reflow, and don't have 
that possibility. The SAW filter has a max input of 0 dBm (1 mW). Can 
anybody tell me how to choose diodes in order make an anti-parallel 
diode limiter myself?

Thanks for helping an RF n00b. 73 de Hans

BX2ABT



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