normal-mode helix

normal-mode helix

[′nȯr·məl ‚mōd ′hē‚liks]
(electromagnetism)
A type of helical antenna whose diameter and electrical length are considerably less than a wavelength, and which has a radiation pattern with greatest intensity normal to the helix axis.
References in periodicals archive ?
This antenna, a normal-mode helix, produces a radiation pattern that is predominantly vertically polarized and is similar to that produced by a standard monopole.
An electronically tuned HF/VHF helical antenna
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