95 GHz Gyrotron with Ferroelectric Cathode

Einat, Moshe; Pilossof, Moritz; Ben-Moshe, Roey; Hirshbein, H.; Borodin, D.

doi:10.1103/physrevlett.109.185101

Cited by 23 publications

(3 citation statements)

References 34 publications

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“…The gyrotron output pulse duration is 15 µs [9]. The output mode of the gyrotron is TE02 [10]. The gyrotron output is coupled to a mode converter that converts the radiation first from TE02 to TE01 circular modes, and then to TE10 rectangular mode, coupled into a standard WR10 waveguide.…”

Section: Optimal Load Resistancementioning

confidence: 99%

Characterization of a Schottky Diode Rectenna for Millimeter Wave Power Beaming Using High Power Radiation Sources

et al. 2017

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Two principal elements play a role in a wireless power beaming system: a high power radiation source as the transmitter and a rectifying antenna (rectenna) as an RF to DC converter at the receiving site. A millimeter wave power transmission is analyzed using transmission system and a W-band rectenna based on a low-barrier Schottky diode. A quasi-optical approach is presented here, using free-space Gaussian propagation and optical ABCD matrices for lenses. Experiments are made to estimate the optimal load resistance and power handling capability of a single rectifier. A low power W-band tunable solid-state source delivering 0.4 W CW power equipped by the focusing lenses is used to characterize the responsivity of the rectenna. A pulsed power gyrotron is used to identify the diode breakdown point. It was found that the RF-to-DC conversion efficiency corresponding to the optimal load of 200 Ω is about 20.5% while the maximum DC power converted by the diode with optimal load is about 15 mW before breakdown.

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Section: Optimal Load Resistancementioning

confidence: 99%

Characterization of a Schottky Diode Rectenna for Millimeter Wave Power Beaming Using High Power Radiation Sources

et al. 2017

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“…The simultaneous coexistence of two instabilities in a REB resulting in formation of squeezed state and beam-plasma instability leads to the complex beam dynamics in the system that may be efficiently analyzed mainly with the help of the numerical methods based on the solving of the self-consistent system of Maxwell equations and motion equations of charged particles. For that reason, the three-dimensional fully electromagnetic selfconsistent CST Particle Studio package, which has worked well in the simulation of different beam instabilities and high-power electron devices, [35][36][37][38][39][40][41][42] is used in our work for the accurate numerical investigations of physical processes in the relativistic two-section vircator model.…”

Section: System Under Studymentioning

confidence: 99%

Investigation of beam-plasma instability in charged plasma in the absence of ions

Дубинов

Petrik

Kurkin

et al. 2016

2016 IEEE International Vacuum Electronics Conference (IVEC)

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We report on the possibility of the beam-plasma instability development in the system with electron beam interacting with the single-component hot electron plasma without ions. As considered system, we analyse the interaction of the low-current relativistic electron beam (REB) with squeezed state in the high-current REB formed in the relativistic magnetically insulated twosection vircator drift space. The numerical analysis is provided by means of 3D electromagnetic simulation in CST Particle Studio. We have conducted an extensive study of characteristic regimes of REB dynamics determined by the beam-plasma instability development in the absence of ions. As a result, the dependencies of instability increment and wavelength on the REB current value have been obtained. The considered process brings the new mechanism of controlled microwave amplification and generation to the device with a virtual cathode. This mechanism is similar to the action of the beam-plasma amplifiers and oscillators. V

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“…By avoiding the use of a slow wave structure, gyrodevices based on the cyclotron resonance maser (CRM) instability, offer higher output power capability [1]. By operating in high order modes, gyrotrons have demonstrated high power (MW) [2] and terahertz operation [3][4][5][6]. However, they can only operate at discrete frequencies.…”

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confidence: 99%

Broadband Amplification of Low-Terahertz Signals Using Axis-Encircling Electrons in a Helically Corrugated Interaction Region

et al. 2017

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Experimental results are presented of a broadband, high power, gyrotron traveling wave amplifier (gyro-TWA) operating in the (75-110)-GHz frequency band and based on a helically corrugated interaction region. The second harmonic cyclotron mode of a 55-keV, 1.5-A, axis-encircling electron beam is used to resonantly interact with a traveling TE_{21}-like eigenwave achieving broadband amplification. The gyro-TWA demonstrates a 3-dB gain bandwidth of at least 5.5 GHz in the experimental measurement with 9 GHz predicted for a wideband drive source with a measured unsaturated output power of 3.4 kW and gain of 36-38 dB. The approach may allow a gyro-TWA to operate at 1 THz.

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95 GHz Gyrotron with Ferroelectric Cathode

Cited by 23 publications

References 34 publications

Characterization of a Schottky Diode Rectenna for Millimeter Wave Power Beaming Using High Power Radiation Sources

Characterization of a Schottky Diode Rectenna for Millimeter Wave Power Beaming Using High Power Radiation Sources

Investigation of beam-plasma instability in charged plasma in the absence of ions

Broadband Amplification of Low-Terahertz Signals Using Axis-Encircling Electrons in a Helically Corrugated Interaction Region

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