Design of coaxial cavity for high power magnetron

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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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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Optimal Design of a Coaxial Cavity Based on Quality-Factor Maximization for High-Power Coaxial Magnetron in $X$ -Band

IEEE Transactions on Plasma Science ◽

10.1109/tps.2018.2800168 ◽

2018 ◽

Vol 46 (3) ◽

pp. 503-510 ◽

Cited By ~ 6

Author(s):

Mohit Kumar Joshi ◽

Sandeep Kumar Vyas ◽

Tapeshwar Tiwari ◽

Ratnajit Bhattacharjee

Keyword(s):

Optimal Design ◽

Quality Factor ◽

High Power ◽

Coaxial Cavity ◽

X Band

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A Fully Coaxial Tunable Broadband Power Equalizer for an X-band MPM

10.20944/preprints202002.0045.v1 ◽

2020 ◽

Author(s):

Patrizia Livreri ◽

Fabio Lo Gerfo

Keyword(s):

High Power ◽

Traveling Wave Tube ◽

Power Devices ◽

Coaxial Cavity ◽

Operating Frequency Range ◽

Power Modules ◽

X Band ◽

Power Stage ◽

Absorbing Material ◽

Radar Applications

Microwave Power Modules (MPM) are high power devices largely used for radar applications. An MPM 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. Power equalizer is often used to flat the TWT output power gain owing to its big gain fluctuations in the operating frequency range. This paper deals with an optimal design and development of a fully-coaxial easy-tunable power equalizer for an X-band MPM. The structure utilizes a coaxial waveguide as the main transmission line and a coaxial cavity loaded with absorbing material as the resonant unit. A sensitivity analysis of the coaxial cavity length, the thickness of the absorbing disc and inserted depth of the probe on the attenuation amplitude and resonant frequency is carried out. The transmission characteristic curves and the voltage standing wave ratio curves show a good compromise in terms of transferred power and adaptive matching impedance at the input and output ports. The measured results show that the equalization curve meets the requirements well and prove that this structure is practical and effective.

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