Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1985-05-28
1988-06-14
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455325, 455326, 330 54, H04B 128, H04B 126
Patent
active
047517441
ABSTRACT:
A monolithic distributed mixer includes a plurality of dual gate field effect transistors (FETs) and first and second corresponding pluralities of T shaped constant K-filters connected respectively to first and second gates of the dual gate FETs for delaying in time the LO and RF voltages applied thereto whereby the phase shift is the same at each filter and the phase difference between the LO and RF at each FET is equal. Thus, the IF energy developed at each drain is in phase. The plurality of dual gate FETs have their drains commonly connected for summing the IF outputs thereof to provide a flat response throughout the bandwidth which is limited only by the cutoff voltages of the FETs or first and second pluralities of K-filters which act as low pass filters.
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Tsironis et al., "Dual-Gate MESFET Mixers", Mar. 1984, pp. 248-255.
Kennan et al., A Miniature 2-18 GHz Monolithic GaAs Distributed Amplifier, 1984, pp. 41-44.
Comfort James T.
Griffin Robert L.
Kuntz Curtis
Robinson Richard K.
Sharp Melvin
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