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This article presents the investigation of a millimetre-wave extended interaction oscillation using both pencil and sheet-shaped pseudospark (PS)-sourced electron beams. Two W-band (75–110 GHz) pencil and sheet beam extended interaction oscillators (EIO) were designed and constructed respectively. The PS-sourced pencil beam EIO structure was firstly driven by a four-gap PS discharge operating at 30...
This article presents the investigation of millimeter wave extended interaction oscillation using both pencil and sheet-shaped pseudospark (PS)-sourced electron beams. A W-band (75–110 GHz) pencil beam extended interaction oscillator (EIO) was designed and constructed. In the first experiment the output power of 38 W was achieved from a four-gap PS discharge operating at 30.5 kV. PS-sourced beam generation...
Combing the advantages of high beam current density in a pseudospark-sourced electron beam and large beam cross section in a sheet electron beam, the design of a 0.2 THz extended interaction oscillator driven by a pseudospark-sourced sheet electron beam is presented in this paper. An interaction circuit with excellent design performance while at the same time being compatible with conventional manufacturing...
High quality intense electron beams play an important role in high power millimeter-wave and terahertz radiation generation. To this end, the pseudospark-sourced electron beam has been investigated with their applications in different beam-wave interaction structures. Different structures have been designed and modelled using the particle-in-cell codes MAGIC and CST Particle Studio. The experimental...
There has been limited focus on evaluation of Sub-synchronous Resonance (SSR) risk between reciprocating engine based generation and series compensated transmission networks. This paper aims to provide an analytical approach for investigating SSR issues associated with reciprocating engine based generators and series compensated transmission lines. Eigen value analysis is performed to determine the...
The pseudospark discharge is a form of low-pressure gas discharge capable of generating extremely high currents with short rise times by means of a unique hollow cathode structure [1-6]. A high-quality electron beam is generated during the later phases of the discharge process, which possesses high current density and brightness, as well as the ability to self-focus via ion channel focusing. This...
Cold test results of a G-band sheet beam backward wave oscillator (BWO) with a double grating waveguide, fabricated by wire cutting and a 3D printing technique, are presented in this paper. The dispersion curve and S-parameters of the BWO slow wave circuit and Bragg reflector were measured and the results compared to the numerical modelling and analytical theory.
Linear time variant (LTV) model is capable of making accurate predictions about phase noise in electrical oscillators, on the assumption that current-phase relation is linear. Unfortunately, this linearity assumption is not valid in the presence of high-power environmental noise. The proposed nonlinear time variant (NLTV) model modifies the existing LTV model, considering phase response saturation...
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