Amplifiers – Signal feedback – Combined with control of bias voltage of signal amplifier
Patent
1973-06-22
1976-11-09
Griffin, Robert L.
Amplifiers
Signal feedback
Combined with control of bias voltage of signal amplifier
330 49, H04B 116
Patent
active
039913732
ABSTRACT:
An input circuit for use in a microwave receiving system. The input circuit includes an antenna for receiving the microwave signals and a parametric down converter, which operates in a lower side-band frequency position. The parametric down converter includes a mixing diode, a pump circuit, an input signal circuit and an output circuit. The input signal circuit of the parametric down converter is directly connected to the antenna so that the input signal circuit of the parametric down converter is terminated by the real portion of the antenna impedance. The impedance of the antenna is selected so that for p >> z (where p is the pump frequency and z is the intermediate frequency) the impedances of the antenna at the signal frequency p + z and at the reflective frequency p - z approach the same value.
REFERENCES:
patent: 3118113 (1964-01-01), Ferrar et al.
patent: 3237017 (1966-02-01), Maurer et al.
patent: 3320432 (1967-05-01), Rosa
patent: 3334299 (1967-08-01), Holzwarth
patent: 3353099 (1967-11-01), Hayasi et al.
patent: 3562657 (1971-02-01), Locherer et al.
patent: 3710255 (1973-01-01), Gicca
patent: 3784916 (1974-01-01), Maurer
sie et al; "Noise Figure of Receiver Systems Using Parametric Amplifiers" 1959 -IRE Convention - pp. 141-157.
Ross et al.; "Parametric Frequency Convertors with Arbitrary Pumping Angles" Proceedings of IEEE, June 1962, pp. 239-240.
Parametric and Tunnel Diodes, K. Chang, Prentice-Hall EE Series 1964.
"Unidirectional Lower Sideband Parametric Amplifier Without Circulator" G. Thompson, Proc. of IRE, Nov. 1961, p. 1684.
"Parametric Frequency Convertors with Arbitrary Pumping Angles", Ross and Skalnik, Jan. 1963, Proceedings of IEEE, pp. 239-240.
"Low Noise Nonreciprocal Parametric Amplifier with Power Matching at the Input and Output", Maurer and Locherer, Proc. of IEEE, Nov. 1963, p. 1589.
Transistor Circuits, edited by R.F. Shea, c. 1957, pp. 290-299; pp. 332-334.
Locherer Karl-Heinz
Maurer Robert
Griffin Robert L.
LICENTIA Patent-Verwaltungs-G.m.b.H.
Psitos Aristotelis M.
LandOfFree
Input circuit for a microwave receiving system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Input circuit for a microwave receiving system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Input circuit for a microwave receiving system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1727811