.pi./2 power divider

Details .pi./2 power divider .pi./2 power divider

1989-04-05

1990-07-31

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333123, 333131, 333170, H01P 516

Patent

active

049453211

ABSTRACT:
In a .pi./2 power divider, particularly a .pi./2 hybrid for the radio-frequency antenna of a nuclear magnetic resonance tomography apparatus, a decoupling circuit having unbalanced-to-ground line transformers is provided. Each branch thereof contains an all pass network consisting unbalanced-to-ground line transformers at the output. A broadband .pi./2 hybrid is obtained particularly with a broadband 3 dB/180.degree. hybrid as the decoupling circuit.

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patent: 4570134 (1986-02-01), Woodward
patent: 4814730 (1989-03-01), Via et al.
"Quadrature Detection in the Laboratory Frame," Hoult et al., Magnetic Resonance in Medicine, vol. 1, pp. 339-353 (1984).
"Tauschenbuch der Hoch Frequenztechnik," Fourth Edition, vol. 1, pp. L27-L35 (1986).
"Theorie der Zwei-Phasen-Netzwerke," Wunsch, Nachrichtentechnik, vol. 5, pp. 200-205 (1957).
"Einige grundsaetzliche Betractungen zu Breitband-Uebertragern", Hilberg, NTZ, vol. 9, pp. 527-538 (1966).

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