Development Of A 0 5 To 2 1 Ghz Low Noise Traveling Wave Tube Amplifier
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Development Of A 0 5 To 2 1 Ghz Low Noise Traveling Wave Tube Amplifier
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Author : Robert D. Frost
language : en
Publisher:
Release Date : 1967
Development Of A 0 5 To 2 1 Ghz Low Noise Traveling Wave Tube Amplifier written by Robert D. Frost and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
The purpose of this program is the attainment of low-noise amplification over two octaves in a single traveling-wave tube. Noise figure is to be less than 6.5 dB from 0.5 to 2.1 GHz with a minimum of three milliwatts saturated power output. The work described herein has been aimed primarily at raising the power output to the required three milliwatt level and achieving uniform gain over the full band. This has been sought through the use of a servered helix, with the output section operating with higher voltage and lower gamma than the input, or low-noise section. Good results have been obtained with this method, the power output being greater than two milliwatts over practically the entire band. It is concluded that this approach is entirely feasible technically, and that future effort will be expended applying it to reduce gain variation at an increased power level. At present, noise figure of the tube is within the specification over all of the band. (Author).
Development Of An 18 To 40 Ghz Low Noise Traveling Wave Tube Amplifier
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Author : L. Dombro
language : en
Publisher:
Release Date : 1970
Development Of An 18 To 40 Ghz Low Noise Traveling Wave Tube Amplifier written by L. Dombro and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Amplifiers, Traveling-wave categories.
Technical Abstract Bulletin
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Author :
language : en
Publisher:
Release Date :
Technical Abstract Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Science categories.
Development Of An 18 To 40 Ghz Low Noise Traveling Wave Tube Amplifier
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Author : L. Dombro
language : en
Publisher:
Release Date : 1970
Development Of An 18 To 40 Ghz Low Noise Traveling Wave Tube Amplifier written by L. Dombro and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.
A low noise traveling wave tube amplifier packaged with integral solid state power supply and permanent magnet focusing was developed to cover the frequency band 18 to 40 GHz. The amplifier noise figure lies between 13 and 14 dB; the minimum small signal gain is 32 dB, and the gain variation is plus or minus 2.7 dB. The minimum saturated power output is + 6 dbm. The tube employs a hollow beam six anode low noise electron gun. A unique ridge waveguide coupler was developed to cover the double waveguide band. A key factor in reducing gain variation was development of an improved 'skrunching' method for the fluted glass helix support structure. The tube completes a series of four low noise traveling wave tube amplifiers covering the 0.5 to 40 GHz frequency band. (Author).
The Development Of A Low Noise Backward Wave Amplifier Tube
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Author : Robert Eastman Vehn
language : en
Publisher:
Release Date : 1959
The Development Of A Low Noise Backward Wave Amplifier Tube written by Robert Eastman Vehn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Amplifiers, Vacuum-tube categories.
Development And Delivery Of A Very Low Noise Traveling Wave Tube Amplifier
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Author : John N. Nelson
language : en
Publisher:
Release Date : 1965
Development And Delivery Of A Very Low Noise Traveling Wave Tube Amplifier written by John N. Nelson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
The report describes the design and development of the WJ-276-6, a 5 dB terminal noise figure, 8.0 to 12.0 Gc/s, permanent magnet focused traveling-wave tube amplifier with integral power supply. The major problem in the development was reducing the terminal noise figure to less than 5 dB, while keeping the weight of the amplifier to less than 15 pounds. This problem was solved by the use of a hybrid straight field magnet, which provided a peak magnetic field of 1500 gauss in the critical region of the cathode and electron gun; a high gamma a, low RF loss helix assembly; a novel thin-rim cathode and flexible low noise gun assembly; and low RF loss waveguide input coupling. The report describes the important design considerations and the effect of the design parameters on traveling-wave tube performance. A physical description of the tube is presented along with important fabrication and measurement techniques. The progress which lead to the final design is chronicled, and the initial and final design values compared. (Author).
Development Of A 300 1000 Megacycle Traveling Wave Tube Amplifier
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Author : Alvin Ross Margolin
language : en
Publisher:
Release Date : 1949
Development Of A 300 1000 Megacycle Traveling Wave Tube Amplifier written by Alvin Ross Margolin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with Amplifiers, Vacuum-tube categories.
Development Of A Double Octave Bandwidth Traveling Wave Tube Amplifier
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Author : B. P. Israelsen
language : en
Publisher:
Release Date : 1964
Development Of A Double Octave Bandwidth Traveling Wave Tube Amplifier written by B. P. Israelsen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.
The purpose of the program is the attainment of lownoise amplification over two octaves in a single travelingwave tube. Noise figure is to be less than 6 db from 2.0 to 8.0 Gc, with a minimum of ten milliwatts saturated power output. The work described in this report has been aimed primarily at reducing rf losses that occur in the input, since these losses add directly to the noise figure of the amplifier. These losses result from rf radiation at the pin seal, and from the insertion loss of presently available dc returns. The cathode coating has also been investigated. Two new cathode binder materials were evaluated with no significant effect upon noise figure of the amplifier. (Author).
Research Program On Low Noise Microwave Receiver Amplifying Devices
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Author : A. Presser
language : en
Publisher:
Release Date : 1960
Research Program On Low Noise Microwave Receiver Amplifying Devices written by A. Presser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with categories.
Research concerned the development of solid-state devices and traveling wave tubes for use in a low noise microwave receiver. Two low-noise, L-band tunnel-diode amplifiers were built and delivered. Both amplifiers had voltage-gain-bandwidth products exceeding the objective specifications. The best experimental results were as follows: center frequency 1270 mc, bandwidth 64 mc, gain 26 db, noise figure 5 db. Three parametric subharmonic oscillators (pump frequency 5700 mc, signal frequency 2850 mc) were built and delivered. A four-terminal low-noise modulate-demodulate L-band parametric amplifier was built and tested. A traveling-wave-tube amplifier is described which has demonstrated a capability for very low noise operation in the S-band range of microwave frequencies. Effort included theoretical studies concerning noise reduction in beam devices, coupled with experimental tests. The final tube design achieved minimum tube noise figures as low as 2.6 db and broadband noise figures of less than 3.5 db in the 2100 - 3500 mc frequency range.
Typical Operating Characteristics Of Traveling Wave Tube Amplifiers
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Author : Stanford University. Stanford Electronics Laboratories
language : en
Publisher:
Release Date : 1957
Typical Operating Characteristics Of Traveling Wave Tube Amplifiers written by Stanford University. Stanford Electronics Laboratories and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1957 with categories.