Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1991-06-28
1994-08-30
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333128, 333161, 343895, H01P 1213, H01P 512
Patent
active
053431731
ABSTRACT:
A method of and apparatus for transmitting or receiving circularly polarized signals is disclosed. The technique employs a phase shifting network for connection between an antenna and a radio transmitter or receiver to produce a phase shift when transmitting or eliminate a phase shift when receiving. In one preferred embodiment, a dielectric substrate has a phase shifting network or printed circuit lines defining a signal transmission paths between a radio connection terminal and a plurality of antenna element connection terminals for coupling a multi-element antenna and a radio. Each transmission path is phase shifted relative to an adjacent path by a predetermined amount by each path having progressively equally different electrical length to provide equal phase shift of a radio frequency signal progressively through the transmission paths. Adjacent path pairs are progressively joined at combiner nodes of equal power division by shunt connection line segments to that the power at each antenna connection terminal is equal to the power at the radio connection terminal divided by the number (typically four) of antenna terminals.
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Bert et al, The Traveling-Wave Divider/Combiner, IEEE Trans. on MTT, Vol. MTT-28, No. 12, Dec. 1980, pp. 1468-1473.
Balodis Miroslaw
Zamat Hassan
Gensler Paul
MESC Electronic Systems, Inc.
Seeger Richard T.
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