Ground independent feed network for a multiterminal antenna

Details Ground independent feed network for a multiterminal antenna Ground independent feed network for a multiterminal antenna

1991-08-29

1993-11-02

Lee, John D.

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

H01Q 2100

Patent

active

052587703

ABSTRACT:
A feed network for a multiterminal antenna which provides excitation to the antenna independent of ground. The feed network provides a voltage differential between terminals of the antenna instead of between a common ground point and a terminal so that the antenna achieves enhanced broadband performance via an attached balun for each coaxial cable. The feed network is comprised of a base, through which a plurality of coaxial connector extend, and a plurality of printed circuit boards positioned so as to define a centerline through the feed network. The printed circuit boards have a first side having a first, wide twin lead and a second side having a second, narrow twin lead such that the electrical signals conducted by the feed network are balanced between each pair of first and second twin leads. The twin leads of the printed circuit board are electrically connected to a corresponding connector of the plurality of coaxial connectors. The width of the etched twin lead decreases as it progresses along a linear converging path from the base towards the apex of the feed network at which point the trace of each twin lead is varied to follow a path parallel to a centerline of the feed network. Jumper wires are utilized to connect the twin leads at the apex of the feed network to the terminals of the antenna. The twin leads are spaced such that a single jumper wire may be connected to twin leads from two adjacent printed circuit boards.

REFERENCES:
patent: 3987458 (1976-10-01), Reggia et al.

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