Thread: Not much of an antenna per Cebik
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Old May 31st 07, 07:27 AM posted to rec.radio.amateur.antenna
Richard Clark Richard Clark is offline
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Default Not much of an antenna per Cebik
On Wed, 30 May 2007 21:41:03 -0500, (Richard
Harrison) wrote:

Does the model result in a low deivepoint impedance?

Hi Richard,

No more nor less than by the consideration of classical designs.

Does the Vee result in high response off the tips of the elements?

This and the next draw the answer together:

Does close coupling between elements result in great bandwidrh for the
antenna?

Coupling? No, but the bandwidth is in gain, not match (which can be
taken care of by other means). The V shape takes the higher
frequency's tendency to become endfire and aligns it with the boom
(meaning the forward gain at higher frequency is still towards the
front instead of being off the ends of a standard, orthogonal design).
Think how the V shape of the Rhombic brings the lobe towards the major
axis. At the lower frequency, the V angle doesn't matter much and so
the forward gain is still aligned with the boom.

Something of a parasitic half Rhombic (or parasitic V).

73's
Richard Clark, KB7QHC
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