Compact hybrid providing quadrature phase relation between two o

Details Compact hybrid providing quadrature phase relation between two o Compact hybrid providing quadrature phase relation between two o

1984-04-19

1986-02-11

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333127, H01P 519

Patent

active

045701342

ABSTRACT:
A hybrid uses stubs to provide 90 degrees of phase shift between output lines for feeding a circularly polarized antenna. Capacitive and inductive stubs have low and high characteristic impedances for broad bandwidth. The stubs can be located in the output lines for compactness, or in a T-section between an input line and the output lines, for compactness, to minimize undesired phase shift, and for ease of connection. The hybrid can include one quarter wave transformers having a characteristic impedance of geometric mean of the hybrid and antenna for improved axial ratio.

REFERENCES:
patent: 2510064 (1950-06-01), Bryan
patent: 2633531 (1953-03-01), Nelson
patent: 2667619 (1954-01-01), Raymond
patent: 2897456 (1959-07-01), Geppert
patent: 4127831 (1978-11-01), Riblet
patent: 4367445 (1983-01-01), Dydyk
Antennas by J. D. Kraus, pp. 426 and 427, published by McGraw-Hill Book Company, Inc. 1950.
Microwave Transmission Design Data by Theodore Moreno, p. 39, published by Dover Publications, Inc., New York.

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