Primary feed with central conductor defining a discharge path

Details Primary feed with central conductor defining a discharge path Primary feed with central conductor defining a discharge path

1989-02-13

1992-02-04

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With polarization filter or converter

343781P, 343786, H01Q 1302, H01Q 1913

Patent

active

050863037

ABSTRACT:
A primary radiator is provided which can be used in an attenna to be mounted in an artificial satellite. In particular, the primary radiator is designed to prevent an electrical charge caused by charged particles in a space environment. In the conventional type of radiator, there typically has been no arrangement for preventing such electrical charge which may cause a short-circuited condition resulting in providing noise or communication difficulties. In order to prevent this electrical charging, a fine metallic conductor is passed from the central part of a sub-reflector through an axial central part where an influence for the electromagnetic field is minimal within the circular waveguide constituting the primary radiator. The conductor is then connected to ground in a DC form at a rectangular and circular converter of the primary radiator. With such a construction, since the metallic conductor is crossed at a right angle with an electric field of a dominant mode for transmitting within the waveguide, less disturbance of electromagnetic field is found, and further the metallic conductor may act to prevent the electrical charging.

REFERENCES:
patent: 2605416 (1952-07-01), Foster
patent: 2698901 (1955-01-01), Wilkes
patent: 3581311 (1971-05-01), Kach
patent: 4178576 (1979-12-01), Schmidt et al.

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