Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1982-06-18
1983-05-10
Griffin, Donald A.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
333 18, H03G 1104, H03K 1726
Patent
active
043831893
ABSTRACT:
Two microwave signals of identical frequency, possibly differing in amplitude and/or phase from each other, are combined by feeding them to respective inputs of a directional coupler with outputs each carrying an unshifted component of one and a quadrature-shifted component of the other input signal. The composite output signals of the coupler are fed to a hybrid junction which combines them cophasally into a sum signal and with relative phase inversion into a difference signal. The sum signal, besides energizing a load, is applied directly to a reference input of a first coherent detector and through a 90.degree. phase shifter to a reference input of a second coherent detector each receiving the difference signal on a monitoring input. The first detector controls a phase shifter upstream of one of the coupler inputs to correct for phase deviations while the second detector controls a phase shifter downstream of one of the coupler outputs to correct for changes in relative amplitude. The hybrid junction may be a Magic T, or another directional coupler preceded by a 90.degree. phase shifter in series with one of its inputs.
REFERENCES:
patent: 3013224 (1961-12-01), King
patent: 4024460 (1977-05-01), Vifian
patent: 4308471 (1981-12-01), Misawa
patent: 4339631 (1982-07-01), Nishioka
patent: 4341999 (1982-07-01), Rudish et al.
Griffin Donald A.
Italtel Societa Italiana Telecomunicazioni S.p.A.
Ross Karl F.
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