Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1978-10-02
1980-09-16
Lieberman, Eli
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
370 24, 455 31, 343854, H04B 700, H01Q 324
Patent
active
042233100
ABSTRACT:
The inventive antenna coupling system is capable of simultaneously radiating an omnidirectional signal pattern for a plurality of transmitters as well as providing a directive pattern to a receiver.
An antenna array is coupled to the transmitters and receiver via a plurality of antenna couplers. Each coupler includes an antenna terminal, coupled to a corresponding antenna, a transmitter input terminal and a receiver output terminal. Multiple transmitters are coupled to the transmitter input terminals through a hybrid network array. The receiver is coupled to the receiver output terminal via a logic controlled antenna switch. The antenna couplers, which may be comprised of either high pass-low pass filters or circulators provide isolation between the transmit and receiver signals.
REFERENCES:
patent: 3226724 (1965-12-01), Brueckmann
patent: 3295134 (1966-12-01), Lowe
Arnold Pitt W.
Davidson Allen L.
Stern Morton
Gillman James W.
Lieberman Eli
Motorola Inc.
Scheer James A.
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