[TowerTalk] Horizontal Loops

[Tom Rauch]

> If a folded dipole performs like a normal dipole, why
doesn't a horizontal
> loop perform like a rhombic ?

Because a Rhombic is diamond-shaped uni- or bi-directional
antenna normally more than 2 WL on a leg and has the angles
adjusted so the lobes from all four sides align at a low
wave angle.

A loop generally has no particular adjustment of angles or
length.

A Rhombic also has very poor efficiency along with many
spurious lobes, and so is not really a very high gain
antenna for the physical area. The big Rhombic at ARRL HQ
for example was reported to have about the same signal as a
three element monoband yagi. They do however produce useable
patterns over very wide bandwidths.

73 Tom