Frequency agile characteristics of a dielectric filled relativistic magnetron with diffraction output

Abstract

This paper reports the investigations of a dielectric filled relativistic magnetron with diffraction output (MDO) on frequency agile. The mechanism of frequency agile is theoretically analyzed. Particle-in-cell simulations and preliminary experiments prove the analytics. In experiments, under the working conditions, 605 kV and 0.3 T, a microwave with 1.98 GHz, 200 MW is radiated from an A6 type MDO when the 95% Al2O3 ceramics with the total thickness of 0.9 cm are filled. Compared with the microwave of 3.72 GHz, 240 MW obtained without the ceramics filled, the frequency agile from S band to L band is achieved.

A direct density modulation cathode in magnetron

“…The cathodes are, respectively, assembled in an MDO. [10][11][12][13] The rise time of applied voltage is set to 17 ns. In Fig.…”

Broadband Continuous Transverse Stub (CTS) Array Antenna for High-Power Applications

“…With the expansion of HPM applications [8][9][10][11], HPM sources with a single frequency can no longer meet the requirements. The study of frequency-tunable HPM sources has become an important direction for HPM technology [12][13][14][15][16][17][18][19][20]. Frequency-tunable HPM sources have two advantages: (1) they can adjust the output frequency according to the different types of targets, thereby increasing the coupling probability between HPM and targets and enhancing the effectiveness of HPM on targets; (2) in the study of the HPM effect, by changing the frequency of the output, the microwave can improve the efficiency of the effect in experiments and help us to understand the physical mechanism of the interaction between HPM and the target.…”

A dielectric-filled magnetically insulated transmission line oscillator

“…In our laboratory, a dielectric filled relativistic magnetron has been investigated experimentally. 30 The maximum electric field strength on the surface of the dielectric is 290 kV/cm and no obvious flashover is observed in the experiment. In the simulation of the DFMILO, when the peak output microwave power is 3 GW, the maximum electric field strength on the surface of the dielectric is 300 kV/ cm.…”

“…[28][29][30] In order to enhance the power conversion efficiency and the compactness, a dielectric-filled MILO (DFMILO) is presented in this paper. The simulation results indicate that the power conversion efficiency is enhanced from 8.5% in the relevant unfilled MILO to 14.0% in the DFMILO.…”