Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1985-04-15
1987-11-24
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455323, 455325, 455326, 333138, H04B 128
Patent
active
047094109
ABSTRACT:
A radio frequency circuit having at least one output terminal includes a plurality of non-linear elements, each having an output electrode. Means are provided for feeding at least one input signal to each one of the non-linear elements. The feeding means includes an electrical pathlength including at least one two port phase shifting element fed by at least the input signal, for providing a plurality of signal portions, each one fed to a corresponding one of the plurality of non-linear elements. These signal portions have a successively increasing phase shift related to the electrical pathlength of the two port phase shifting elements. The output electrodes of each non-linear element are interconnected by an input coupling means including at least one, different, two port phase shifting element, for successively electrically interconnecting the output electrode of each non-linear element. With such an arrangement, by providing two port phase shift elements in the input and output coupling means, proper phasing characteristics may be provided to such circuits without the necessity of using couplers or baluns which are generally difficult to fabricate, particularly, as broadband monolithic microwave integrated circuits.
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"A Microwave Distributed MESFET Mixer" by O.S.A. Tang et al., IEE Colloquium on Multi-Octave Microwave Components--Active and Passive, London, England, Apr., 1984, pp. 483-487.
Pucel Robert A.
Tajima Yusuke
Maloney Denis G.
Ng Jin F.
Raytheon Company
Seidenglanz Elissa
Sharkansky Richard M.
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