Amplifiers – With semiconductor amplifying device – Including distributed parameter-type coupling
Patent
1993-02-18
1994-08-16
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including distributed parameter-type coupling
330306, 333 33, H03F 360
Patent
active
053390474
ABSTRACT:
An X-band (8-12.5 GHz) amplifier comprises a bipolar junction transistor (BJT) arranged for receiving an X-band signal, amplifying the signal and providing the amplified signal to further circuitry. Input and output matching networks are advantageously provided for the BJT. Each network may have a first end for connection to a BJT and a second end for connection to a terminal, and may comprise a series connection of a first inductor, a first capacitor and a second inductor extending from the first end to the second end in that order; a third inductor connected between ground and the connection point of the first capacitor and the second inductor; and a second capacitor connected between ground and the second end. The various reactance components may be implemented on a dielectric board, for example by microstriplines and/or shaped cladding portions. An X-band oscillator may comprise the X-band amplifier described above, and a feedback circuit interconnecting an output and an input of the amplifier. The feedback circuit may comprise first and second feedback means, for example microstriplines, which may be coupled to a dielectric resonator.
REFERENCES:
Schwaderer et al., "Kettenverstarker mit bipolaren Siliziumtransistoren: MHz bis 6 GHz," Nov. 6, 1981 p. 1.
Kotzebue et al., "Design technique for broadband microwave transistor power amplifiers", May 1979 p. 125.
Young, "Speed uhf microstrip amplifier design" Oct. 12, 1992 p. 80.
"Proceedings of the 43rd Annual Symposium on Frequency Control 1989" Cosponsored by the U.S. Army Electronics Technology and Devices Laboratory and The Institute of Electrical and Electronics Engineers, Inc., Ultrasonics, Ferroelectrics and Frequency Control Society, IEEE Catalog No. 89CH2690-6, May 31-Jun. 2, 1989.
McGowan Raymond C.
Mizan Muhammad A.
Anderson William H.
Dudek J.
Mullins James B.
The United States of America as represented by the Secretary of
Zelenka Michael
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