I agree with Jeff. Properly functioning cables and connectors are not nonlinear and thus cannot produce the effects that Lankford reports (assuming that he has achieved a proper match to eliminate the obvious length-dependent effects). A 20dB degradation in intercept sounds like the result of a tarnished connector to me.
-- Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070
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On 5/14/2023 01:42, G8HUL wrote:
I think that the coax cables, and connectors, should be investigated in isolation, Non-linearities in cables and connectors are a well-known phenomenon.
73
Jeff G8HUL
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Jeff Green
Sent: 14 May 2023 01:19
To: [email protected]
Subject: Re: [Test Equipment Design & Construction] Low noise high reverse isolation low distortion RF Amplifier
The best I can do is to refer you to this web page PDF, Dr. Lankford's concept of best small antennas.
,%20LW,%20And%20SW%20rev%202.pdf
Here is some of the text"
"While studying active whip intercepts some time ago I discovered, much to my amazement, that long coax (50 feet) lead often degrades 2nd order intercepts of active whip antennas by 20dB
