TopBand: Proximity to Trees

[km1h@juno.com]

On Thu, 12 Dec 1996 16:53:38 -1000 Jeffrey Herman <jherman@hawaii.edu>
writes:
>The military has done extensive studies regarding RF absorption
>by foliage. 20 years ago while in Coast Guard Radioman school
>I recall some instruction regarding this; my memory is a bit
>dim but what stands out is that all antennas should be kept
>clear of all growth, and don't depend heavily upon ground
>wave propagation over forested areas.
>
>If someone on the list lives near a military service school
>specializing in radio comms I'm sure one of the instructors
>there would be glad to share some info with you. In particular,
>anyone near Petaluma CA could call the US Coast Guard Radioman
>School.
>
>73 from Hawaii,
>Jeff KH2PZ (former USCG CW op at NMO)




I will take that a step further.

The military for at least 2 decades has used trees as the actual 
antenna.  There is equipment produced for certain applications that uses
a probe to stick in to a tree, the "box" has a built-in ATU to "match the
tree".

Much of the above is modeled on higher levels of NEC that are not
released to the public. 

73..............Carl

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