Design of a v-Band High-Power Sheet-Beam Coupled-Cavity Traveling-Wave Tube

Abstract

Abstract-The design and analysis of a high-power wideband sheetbeam coupled-cavity traveling-wave tube operating at V-band is presented. The interaction circuit employs three-slot doubly periodic staggered-ladder coupled-cavity slow-wave structure, and a 5 : 1 aspectratio sheet electron beam is used to interact with the circuit. Combined with design of the well-matched input and output couplers, a 3-D particle-in-cell model of the sheet-beam coupled-cavity traveling-wave tube is constructed. The electromagnetic characteristics and the beamwave interaction of the tube are investigated. From our calculations, this tube can produce saturated output power over 630 Watts ranging from 58 GHz to 64 GHz when the cathode voltage and beam current are set to 13.2 kV and 300 mA, respectively. The corresponding saturated gain and electron efficiency can reach over 32.5 dB and 15.9%. Compared with the circular beam devices, the designed sheetbeam TWT has absolute advantage in power capability, and also it is more competitive in bandwidth and electron efficiency.

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

“…Although various components have been developed for THz applications [5][6][7][8][9][10][11][12][13][14][15][16][17][18], high power, low cost, and compact THz sources are not readily available [19]. With the rapid advancement of multi-physics based codes, which provide the possibility of simulating the nonlinear beam-wave interaction dynamics [20][21][22][23][24], extending the operating frequency of the existing microwave tube designs [25][26][27][28][29] has become a promising approach for developing compact and powerful THz sources [30][31][32][33][34][35][36]. In accordance with this approach, design and numerical simulations of a 140 GHz spatial-harmonic magnetron (SHM) with a maximum pulse-output power of about 11 kW is presented in this paper.…”

A Novel Slotted Helix Slow-Wave Structure for Millimeter-Wave Traveling-Wave Tube

“…Millimeter-wave radiation sources with high power, wide-bandwidth, and high efficiency are attractive for many applications, such as high-date-rate communications, high-resolution radar, and space applications [1][2][3][4][5][6][7][8]. Helix TWT is one of the most important millimeterwave vacuum amplifiers due to its outstanding combined performances in bandwidth, power capacity, and electronic efficiency.…”

Fast H-Waves in Double Comb Infinite Arrays

“…This concerns classical electronic devices like travelling wave tube amplifiers, backward wave oscillators, diffraction radiation oscillators, reflex klystrons, etc. [1][2][3][4][5][6][7][8][9][10]. These devices use different principles of interaction between the electron beam and electromagnetic waves.…”