Design of the RF Circuit for a Coaxial Cavity High-Power Multiple-Beam Klystron

Rui Zhang; Yong Wang

doi:10.1109/ted.2014.2301013

Design of the RF Circuit for a Coaxial Cavity High-Power Multiple-Beam Klystron

IEEE Transactions on Electron Devices ◽

10.1109/ted.2014.2301013 ◽

2014 ◽

Vol 61 (3) ◽

pp. 909-914 ◽

Cited By ~ 2

Author(s):

Rui Zhang ◽

Yong Wang

Keyword(s):

High Power ◽

Coaxial Cavity ◽

Multiple Beam ◽

Rf Circuit

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Development of multiple beam electron guns and high power waveguide windows and components

10.1063/1.59043 ◽

1999 ◽

Author(s):

Lawrence Ives ◽

George Miram ◽

Andrew Nordquist ◽

Jeff Neilson ◽

William Vogler ◽

...

Keyword(s):

High Power ◽

Beam Electron ◽

Multiple Beam ◽

Electron Guns

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Hardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System

Instruments ◽

10.3390/instruments2030016 ◽

2018 ◽

Vol 2 (3) ◽

pp. 16 ◽

Cited By ~ 3

Author(s):

Ram Narayanan ◽

Kyle Gallagher ◽

Gregory Mazzaro ◽

Anthony Martone ◽

Kelly Sherbondy

Keyword(s):

Radio Frequency ◽

Measurement System ◽

High Power ◽

Nonlinear Distortion ◽

Dynamic Range ◽

Low Level ◽

Rf Systems ◽

Nonlinear Distortions ◽

Circuit Elements ◽

Rf Circuit

Radio frequency (RF) circuit elements that are traditionally considered to be linear frequently exhibit nonlinear properties that affect the intended operation of many other RF systems. Devices such as RF connectors, antennas, attenuators, resistors, and dissimilar metal junctions generate nonlinear distortion that degrades primary RF system performance. The communications industry is greatly affected by these unintended and unexpected nonlinear distortions. The high transmit power and tight channel spacing of the communication channel makes communications very susceptible to nonlinear distortion. To minimize nonlinear distortion in RF systems, specialized circuits are required to measure the low level nonlinear distortions created from traditionally linear devices, i.e., connectors, cables, antennas, etc. Measuring the low-level nonlinear distortion is a difficult problem. The measurement system requires the use of high power probe signals and the capability to measure very weak nonlinear distortions. Measuring the weak nonlinear distortion becomes increasingly difficult in the presence of higher power probe signals, as the high power probe signal generates distortion products in the measurement system. This paper describes a circuit design architecture that achieves 175 dB of dynamic range which can be used to measure low level harmonic distortion from various passive RF circuit elements.

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High-Power Four-Cavity S-Band Multiple-Beam Klystron Design

IEEE Transactions on Plasma Science ◽

10.1109/tps.2004.828884 ◽

2004 ◽

Vol 32 (3) ◽

pp. 1119-1135 ◽

Cited By ~ 38

Author(s):

K.T. Nguyen ◽

D.K. Abe ◽

D.E. Pershing ◽

B. Levush ◽

E.L. Wright ◽

...

Keyword(s):

High Power ◽

Multiple Beam

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Optimal Design of an X-Band, Fully-Coaxial, Easily-Tunable Broadband Power Equalizer for a Microwave Power Module

Electronics ◽

10.3390/electronics9050829 ◽

2020 ◽

Vol 9 (5) ◽

pp. 829

Author(s):

Fabio Paolo Lo Gerfo ◽

Patrizia Livreri

Keyword(s):

High Power ◽

Microwave Power ◽

Sensitivity Analyses ◽

Operating Frequency ◽

Power Module ◽

Insertion Depth ◽

Large Power ◽

Coaxial Cavity ◽

X Band ◽

Power Stage

A microwave power module (MPM), which is a hybrid combination of a solid-state power amplifier (SSPA) as a driver and a traveling-wave tube amplifier (TWT) as the final high power stage, is a high-power device largely used for radar applications. A gain equalizer is often required to flatten the TWT output power gain owing to its big gain fluctuations over the operating frequency range. In this paper, the design of an X-band, fully-coaxial, easily-tunable broadband power equalizer for an MPM is presented. The structure is composed of a coaxial waveguide as the main transmission line and a coaxial cavity loaded with absorbing material as a resonant unit. Sensitivity analyses of the attenuation amplitude and resonant frequency of the equalizer in terms of coaxial cavity length, thickness of the absorbing disc, and insertion depth of the probe were carried out. The measured results were in good agreement with the simulated ones, showing that the equalization curve met the requirements well and proved that this optimal structure has the advantages of a large power capacity, a wide operating frequency band, is easily tunable, and good transmission performance.

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