Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1988-12-06
1991-06-25
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455323, H04B 116
Patent
active
050271636
ABSTRACT:
A wide band RF mixer includes a first bifilar balun transformer coupling a high level source of RF signal to the input winding of a trifilar balun transformer. The two output windings of the trifilar balun transformer are connected in series with the drain-source circuits of a pair of GaAs FET transistors. The source of each FET transistor is connected to ground. A local oscillator has a symmetric output signal that is coupled to a self-bias network and also to the gate electrodes of said FETs. An IF output signal is taken between ground and a common junction of the output balun windings. The arrangement provides a high level mixer with good intermodulation characteristics for ultra high frequencies.
REFERENCES:
patent: 4590616 (1986-05-01), Van Glabbeck
patent: 4727596 (1988-02-01), Jaffer
patent: 4751744 (1988-06-01), Pavio, Jr.
patent: 4949398 (1990-08-01), Maas
Application Note AN85-2 "A Commutation Double-Balanced MOSFET Mixer of High Dynamic Range", by Ed Oxner, Jan. 1986, Siliconix Inc., pp. 5-14.
Ham Radio Magazine, Mar. 1988, "High Dynamic Range Mixing With the Si8901", by Ed Oxner, Siliconix Inc., pp. 10-14.
"A GaAs MESFET Mixer With Very Low Intermodulation", by S. Maas, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-35, No. 4, Apr. 1987, pp. 425-429.
Eisenzopf Reinhard J.
Sutcliffe Geoff
Zenith Electronics Corporation
LandOfFree
High level wide band RF mixer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High level wide band RF mixer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High level wide band RF mixer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1043637