Vertically polarised omnidirectional antenna

Details Vertically polarised omnidirectional antenna Vertically polarised omnidirectional antenna

1974-12-17

1976-04-06

Lieberman, Eli

Communications: radio wave antennas

Antennas

Slot type

H01Q 1312

Patent

active

039494055

ABSTRACT:
A waveguide having a cross-section of oblong shape is pierced with two arrays of longitudinal slots located opposite one another, symmetrically in relation to the longitudinal plane of symmetry of the guide intersecting the cross-section thereof along its smaller dimension. In order to obtain the desired omnidirectional pattern, which requires that the distance between oppositely located slots should not be too great, a waveguide is used the greater dimension of the cross-section of which is reduced relatively to the value required by the operation frequency, and ridges or dielectric material are provided inside the guide for increasing its cut-off frequency.

REFERENCES:
patent: 2455224 (1948-11-01), Buchwalter et al.
patent: 3164834 (1965-01-01), Nikolayuk
patent: 3189908 (1965-06-01), Provencher
patent: 3871000 (1975-03-01), Tymann

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