Topband: verticals by the sea

[donovanf at starpower.net]

Hi Mike, 


There's some vertical polarization off the ends of an inverted-V, 
but is significantly down from the horizontally polarized radiation 
broadside to the antenna. The advantages of a seaside location 
for horizontal polarization are an unobstructed horizon and very 
efficient ground gain from an extremely flat Fresnel zone. Many 
carefully selected land locations can provide the same benefits. 


Unless you can install your inverted-V sufficiently high to produce 
significant low angle radiation, you would would do much better with 
a vertical very close to the sea shore or a salt marsh. 


Installing your inverted-V near the edge of a bluff overlooking the sea 
would also be excellent if its sufficiently close to the edge so that the 
inverted-V illuminates most of the near edge of the Fresnel zone. 
Of course, many land locations can provide the same benefits. 


The benefits of a flat Fresnel zone are discussed in detail in: 


https://archive.org/download/sitingcriteriafo139utla/sitingcriteriafo139utla.pdf 


73 
Frank 
W3LPL 








From: "Mike Smith VE9AA" <ve9aa at nbnet.nb.ca> 
To: topband at contesting.com 
Sent: Friday, April 3, 2015 3:17:48 PM 
Subject: Re: Topband: verticals by the sea 

Is there any advantage to using an inverted VEE by the sea? Didn't I read 
inverted VEEs had a lot of vertical polarization? 

Reason I ask is I plan to do the IOTA contest on an Island in NB or NS and 
have not yet decided on an antenna. 



Thanks, 

Mike VE9AA 





Mike, Coreen & Corey 

Keswick Ridge, NB 



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