Overmoded GW-class surface wave microwave oscillator

Vlasov, Alexander N.; Shkvarunets, A. G.; Rodgers, J.; Carmel, Y.; Antonsen, Thomas M.; Abuelfadl, Tamer M.; Lingze, Duan; Черепенин, В. А.; Nusinovich, G. S.; Botton, M.; Granatstein, V.L.

doi:10.1109/plasma.2000.855071

Cited by 26 publications

(22 citation statements)

References 19 publications

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“…Third, surface waves are prospective for developing electronic devices based on application of new plasma-like meta-materials, which allows one to construct miniaturized electronic devices [21,22]. Fourth, they can also be used in the development of electronic devices, which apply gaseous plasma [23].…”

Section: Discussionmentioning

confidence: 99%

Parametric Instability of Surface Electron Cyclotron Tm-Modes

Girka¹,

Iarko²

2014

PIER M

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Abstract-Excitation of waves at harmonics of electron cyclotron frequency due to utilization of an external alternating electric field is under the consideration. It is proved that they are eigen modes of plasma-dielectric-metal structures in both long (as compared with electron Larmor radius) wavelength range and short wavelength range if an external steady magnetic field is oriented perpendicularly to the plasma interface. It is assumed that uniform external electric field operates at the frequency, which belongs to the range of electron cyclotron frequencies. The problem is solved theoretically using kinetic Vlasov-Boltzmann equation for description of the plasma particles motion and Maxwell equations for description of TM-polarized field of these modes. Non-linear boundary condition for tangential magnetic field of these TM-modes is formulated using conception of non-linear surface electric current. Infinite set of equations for harmonics of their tangential electric field is derived due to this condition. This set is solved using approach of the wave packet consisting of the basic harmonic and two nearest satellite harmonics. Simple analytical expression for growth rate of surface electron cyclotron TMmodes' parametric instability is obtained and analyzed numerically.

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Section: Discussionmentioning

confidence: 99%

Parametric Instability of Surface Electron Cyclotron Tm-Modes

Girka¹,

Iarko²

2014

PIER M

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“…Due to the normalization condition (10), if the ith eigenvector at frequency f 1 slightly differs from the jth eigenvector at frequency f 2 , the element R ij is close to unity. Therefore, there is a strong correlation between Λ 1i and Λ 2j .…”

Section: A Dispersion Equationmentioning

confidence: 99%

“…However, due to the asymmetries related to the electrons' distribution, as well as those attributed to manufacturing tolerances, higherorder modes can also be excited in the cited periodic structures [7]- [9]. In this context, it is important to examine the impact of higher-order modes and asymmetric modes on the dynamics of the electrons during the interaction process, particularly in systems operating at high frequency, where this problem may become critical [10]. Consequently, it is crucial to have an efficient and accurate numerical method for computing the dispersion relations of both symmetric and asymmetric modes in arbitrary slow-wave structures [7].…”

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confidence: 99%

Full-Wave Modal Analysis of Slow-Wave Periodic Structures Loaded With Elliptical Waveguides

Marini

Coves

Boria

et al. 2010

IEEE Trans. Electron Devices

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Abstract-In this paper, a novel full-wave method for the modal characterization of periodic structures loaded with elliptical waveguides is presented. This method relies on an integral equation formulation solved via the method of moments, which finally leads to the solution of a standard eigenvalue problem. The required modal spectrum of elliptical waveguides is determined through the boundary integral-resonant mode expansion technique. For validation purposes, the proposed analysis method is first successfully applied to periodic waveguide structures already considered in the technical literature. Then, our new algorithm is used to compute the related Brillouin diagrams and the interaction impedance of new periodic structures loaded with elliptical waveguides. Not only the main interacting mode (such as the T M 01 mode) is studied, but higher-order Floquet modes are also considered. These results have potential applications as slow-wave structures for high-power microwave devices and possibly filtering structures at millimeter-wave frequencies.

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“…A plasma filling strongly effects on dispersion properties of such waveguide structures. Various aspects of the problem of an interaction between electron beams and the eigenmodes of plasma filled waveguides are investigated in [1][2][3]. The main attention is paid there to studying the processes of waves' excitation in magneto-active plasma waveguides.…”

Section: Introductionmentioning

confidence: 99%

Excitation of Azimuthal Eigen Modes by Modulated Annular Electron Beam

Girka¹,

Puzyrkov²,

Nefodov³

2013

PIER B

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Abstract-Excitation of extraordinarily polarized azimuthal eigen modes by modulated annular electron beam is shown to be characterized by the increase of instability growth rates compared with the case of non-modulated electron beam. Interaction between the modulated beam and azimuthal eigen modes happens in the range of electron cyclotron frequency in waveguides with metal walls, which are partially filled with cold magneto-active plasma. Nonlinear set of differential equations, which describs excitation of these azimuthal modes by an annular electron beam is derived and analyzed numerically. Different scenarios of the beam-plasma interaction depending on relation between azimuthal mode number of the exited waves and periodicity of azimuthal modulation of the beam density, degree and manner of the beams' modulation are studied numerically.

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Overmoded GW-class surface wave microwave oscillator

Cited by 26 publications

References 19 publications

Parametric Instability of Surface Electron Cyclotron Tm-Modes

Parametric Instability of Surface Electron Cyclotron Tm-Modes

Full-Wave Modal Analysis of Slow-Wave Periodic Structures Loaded With Elliptical Waveguides

Excitation of Azimuthal Eigen Modes by Modulated Annular Electron Beam

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