[Milsurplus] Car Whip Antenna "gain"

[Jeff Kruth]

24 dB? Over a standard antenna?   Hmmmm. But aperture gain? There is no aperture. In fact, a car antenna is not considered an antenna at all, except in name. At a frequency of 1 MHz, wavelength is 300 meters, so a 1 m long whip is .3 %. The proper name and way to consider it is as an "electrostatic field probe". You can scarcely make it "resonant" with a coil, sorry. However lengthening the probe will make it intercept more field, So sure, longer is better. Still 24 dB is a gain of 250 X. Still hard to believe, as not directional. The "coax" for the standard car radio set-up was just a low capacitance shieIded wire, to try to get the maximum voltage into the radio. Just so you know that this is not opinion pulled from some nether orifice, I am an antenna guy by profession, who also taught college, with experience in EMC testing, antenna pattern measurement, field strength measurement, etc. Just so you know I am not in the class of the modern "no-nothings".
Jeff Kruth
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