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[TowerTalk] Dielectrically lenghtening the boom

To: "" <>
Subject: [TowerTalk] Dielectrically lenghtening the boom
From: "David J. Sourdis - HK1A" <>
Date: Fri, 18 Dec 2009 10:56:47 -0500
List-post: <">>

Maybe it has already been applied to the cellphone technology or elsewhere, or 
it is just not feasible because dielectric losses...

Dielectric material, lossy in some extent, sets a velocity factor (VF) for wave 
propagation in cables.

This makes the physical lenght of the line shorter than freespace size.

Take a Yagi, and fill the space between elements with a material which its 
dielectric constant is less than 1.0 (air's). 

Would the element spacing, hence the boom lenght, have to be adjusted by a 
shortening factor equal to the VF?


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