IIRC, Metamagnetics considers the 4 dB the insertion loss.? In an interference-limited receiver, that would probably be acceptable.
Jim
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-------- Original message --------
From: "Brooke Clarke via groups.io" <brooke@...>
Date: 3/3/22 2:11 PM (GMT-08:00)
Subject: Re: [HP-Agilent-Keysight-equipment] Spectrum analyser in a high traffic strong signal environment
Hi Jim:
Interesting.? It seems that the weak (desired) signal is attenuated about 4dB while the strong signal is knocked down to
the limiting level.? See:
https://patents.google.com/patent/US20190267960
The device makes use of circulators/isolators to maintain a reasonable VSWR.
I looked since a simple diode limiter does the same thing, except it knocks down all signals and has a high VSWR.
--
Have Fun,
Brooke Clarke, N6GCE
https://www.PRC68.com
axioms:
1. The extent to which you can fix or improve something will be limited by how well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.
