Antenna construction for reducing side lobes of the radiation pa

Details Antenna construction for reducing side lobes of the radiation pa Antenna construction for reducing side lobes of the radiation pa

1979-06-27

1981-03-10

Moore, David K.

Communications: radio wave antennas

Antennas

Wave guide type

343895, H01Q 1300

Patent

active

042557534

ABSTRACT:
A construction for reducing the side lobe energy emitted from antennas, particularly horn antennas, and thereby attenuating unwanted coupling with adjacent antennas, the construction utilizes a continuous helical coil located on the interior surface of the antenna horn in order to progressively delay the current flowing along the horn wall by causing the current to follow a longer path than that portion of the wave which propagates well away from the wall, the number of coil turns being selected to cause the portion of the E plane which arrives at the horn aperture to be out of phase by approximately one-half wave length with the portion of the E plane propagated away from the horn wall so that it will cancel the E plane energy at the aperture.

REFERENCES:
patent: 3732571 (1973-05-01), Neale

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