Multi-mode antenna system having plural radiators coupled via hy

Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin

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343895, 343859, 333 25, 333117, H01Q 2504, H01P 516

Patent

active

051894343

ABSTRACT:
A hybrid circuit module having first and second pairs of input terminals and four output terminals. First, second, third and fourth baluns each include first and second transmission line wires. The baluns are configured between the input and output terminals to isolate sources when placed across pairs of input and output terminals. An antenna system is formed with the hybrid circuit module and a plurality of radiators. The circuit module may be configured to simultaneously generate or receive two or more independent radiation patterns. A method is provided for feeding a multiarm antenna structure with a hybrid circuit network. The method includes the steps of symmetrically positioning a conductive element with respect to all of the arms, and coupling terminals of the antenna arms to the network through a conductive element. Alternately the second terminals may be electromagnetically coupled to the network without requiring the conductive element. Generally the invention enables simultaneously feeding of antenna arms with two or more independent signals in order to transmit or receive multiple independent radiation patterns.

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