B.G. James
7 Papers
3 Citations
B.G. James is an academic researcher. The author has contributed to research in topics: Amplifier & Power bandwidth. The author has an hindex of 4, co-authored 7 publications.
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Papers
Development and testing of a high-average power, 94-GHz gyroklystron
B.G. Danly,Monica Blank,Jeffrey P. Calame,Baruch Levush,Khanh T. Nguyen,Dean E. Pershing,R. K. Parker,Kevin Felch,B.G. James,Philipp Borchard,P. Cahalan,Tak Sum Chu,Howard Roberts Jory,T.A. Hargreaves,R. B. True,W. Lawson,Thomas M. Antonsen +16 more
Abstract: The development of a 10-kW average power, 94-GHz gyroklystron amplifier is described. This average power was obtained with 11% radio frequency (RF) duty factor and 92-kW peak power in the TE/sub 01/ circular cavity mode. The instantaneous bandwidth was 420 MHz, and the efficiency was 33.5%. Low-duty-factor testing also yielded a peak power of as much as 115 kW with 600-MHz instantaneous bandwidth. This development effort was carried out over the past three years and represents record average power performance in an amplifier at this frequency.
Demonstration of a 10 kW average power 94 GHz gyroklystron amplifier
Monica Blank,B.G. Danly,B. Levush,Jeffrey P. Calame,Khanh T. Nguyen,Dean E. Pershing,John J. Petillo,T.A. Hargreaves,R. B. True,A.J. Theiss,G.R. Good,K. Felch,B.G. James,Philipp Borchard,P. Cahalan,T.S. Chu,H. Jory,Wesley Lawson,Thomas M. Antonsen +18 more
TL;DR: In this paper, the experimental demonstration of a high average power W-band (75-110 GHz) gyroklystron amplifier is reported, which has produced 118 AW peak output power and 29.5% electronic efficiency in the TE011 mode using a 66.7 kV, 6 A electron beam at 0.2% rf duty factor.
Development and demonstration of high-average power W-band gyro-amplifiers for radar applications
M. Blank,Kevin Felch,B.G. James,Philipp Borchard,P. Cahalan,Tak Sum Chu,Howard Roberts Jory,B.G. Danly,Baruch Levush,Jeffrey P. Calame,Khanh T. Nguyen,Dean E. Pershing +11 more
TL;DR: In this paper, the results of a focused program to develop high-power W-band gyro-amplifiers, which culminated in the demonstration of record average output powers from amplifiers in this band, are described.
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Demonstration of high average power W-band gyro-amplifiers
Monica Blank,Kevin Felch,B.G. James,Philipp Borchard,P. Cahalan,T.S. Chu,B.G. Danly,Dean E. Pershing,Khanh T. Nguyen,Jeffrey P. Calame,Baruch Levush +10 more
- 12 Sep 2000
TL;DR: In this paper, the experimental demonstration of a five-cavity, high average power W-band (75-110 GHz) gyroklystron amplifier is reported, which produces 10.2 kW average output power and 31% electronic efficiency in the TE/sub 1/1/1 mode using a 55 kV, 6 A electron beam at 10% RF duty factor.
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Demonstration of a high power W-band gyroklystron amplifier for radar applications
Monica Blank,B.G. Danly,B. Levush,Jeffrey P. Calame,Khanh T. Nguyen,Dean E. Pershing,John J. Petillo,T. A. Hargreaves,R.B. True,A.J. Theiss,G.R. Good,Kevin Felch,B.G. James,Philipp Borchard,T.S. Chu,H. Jory,W. Lawson,Thomas M. Antonsen +17 more
- 24 Jun 1999
TL;DR: In this paper, a four cavity, 94 GHz gyroklystron amplifier has been designed and constructed in a collaborative effort between the Naval Research Laboratory, Litton Electron Devices, Communications and Power Industries, and the University of Maryland.
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