It seems they use a lot of frequencies in the 148 to 150 Mhz range. Could
this be a full wave antenna for those frequencies?
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Moose" <olymoose@xxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Monday, December 17, 2012 4:17 PM
Subject: Re: [OM] IMG: Airport Observations
> On 12/17/2012 1:04 PM, Jim Nichols wrote:
>> ...
>> I stopped to take a look at the new Civil Air Patrol Mobile Unit, used
>> for searches for downed aircraft. I was impressed by the communications
>> antennae:
>> http://gallery.leica-users.org/v/OldNick/59+edit.jpg.html
>
> Unless fundamental principles have changed, that antenna looks like a poor
> design.
>
> Antennas needs a ground plane for maximum efficiency. In this case, the
> ground plane is the vehicle. By placing the
> antenna off one corner, you get a highly asymmetric sensitivity pattern,
> high to the right front and low to the left rear.
>
> OTOH, hiding about a third of the length behind the van for about a third
> of directions should negatively affect
> sensitivity.
>
> I wonder what frequency it is for. If the whole thing is antenna, it's
> quite long wave. If not, and the small things
> along its length are tuning coils, rather than connectors for sections,
> roof antenna(s), perhaps hinged, should be more
> electronically effective.
>
> Antennae Head Moose
>
> --
> What if the Hokey Pokey *IS* what it's all about?
> --
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