High power, high-frequency, high-voltage drive coupling for an a

Details High power, high-frequency, high-voltage drive coupling for an a High power, high-frequency, high-voltage drive coupling for an a

1975-12-24

1976-12-21

Lieberman, Eli

Communications: radio wave antennas

Antennas

Waterborne

343885, 343895, H01Q 134, H01Q 152

Patent

active

039991865

ABSTRACT:
The drive coupling for an antenna having a shorting assembly traveling along a helix to tune the antenna includes a metal rotating drive shaft extending concentrically through the shorting assembly with flutes on the drive shaft in the region of the helix. A metal shielding cylinder is disposed coaxial to and spaced from the outer surface of the drive shaft and provides an outer member of the shorting assembly. A drive bearing of dielectric material is disposed to engage the flutes and the shielding cylinder so that rotation of the drive shaft rotates the shielding cylinder to cause the shielding assembly to travel along the helix. A guide bearing of dielectric material is disposed to engage the shielding cylinder and the end of the drive shaft remote from the flutes.

REFERENCES:
patent: 3818488 (1974-06-01), Majkrzak

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