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Feed optimization for the slotted line antenna for high-density plasma production
(1990)
nvestigations on the optimization of feed structures for exciting the slotted line antenna for high-density plasma production are presented. Each feed structure used (except the direct feed) excites a preferred component ...
Study of the long run field degradation of the flat plate photovoltaic module
(1990)
Two major factors of the long-term field degradation of flat-plate photovoltaic (PV) modules are investigated: the increased lumped series resistance and the decreased short circuit. The increment in the lumped series ...
A versatile microprocessor based controller for solar tracking
(1990)
A microprocessor-based solar tracking controller was designed and fabricated. In addition to tracking, the controller is capable of acquiring photovoltaic and meteorological data from a photovoltaic system and controlling ...
Free electron laser in a stripline geometry
(1990)
A thin dielectric slab over a conducting sheet is presented as a low-loss slow-wave guiding system. When one introduces a magnetic wiggler into the system one may efficiently excite millimeter waves by passing a sheet ...
Analysis of fiber directional couplers and coupler half-blocks using a new simple model for single-mode fibers
(1990)
A model for a step-index fiber in the form of an equivalent slab guiding structure is presented. This model simplifies the analysis of fiber directional couplers and coupler half-blocks with dielectric and metallic ...
Plasma effects in a free electron laser
(1990)
The introduction of a plasma and a strong guide magnetic field in a free electron laser (FEL) slows down the phase velocity of radiation, significantly reducing the requirements on beam energy for generating frequencies ...
Effect of plasma and dielectric loading on the slow-wave properties of a traveling-wave tube
(1990)
The dispersion characteristics of a helix-loaded traveling-wave tube (TWT) when a dielectric or plasma is introduced into the system are discussed. The dispersive properties of the dielectric-supported helix waveguide are ...
Design of a mode filter consisting of two dual-mode highly elliptical-core fibers
(1990)
Coupling characteristics of directional couplers consisting of two dual-mode highly elliptical-core fibers have been studied in detail using a first-order perturbation approach, and two different designs of a mode filter ...
Mean lifetime calculations of quantum well structures: a rigorous analysis
(1990)
A matrix method that is applicable to an arbitrary potential variation represented by a set of linear functions such as multiple quantum well structures in the presence of a static electric field is described. An analytical ...
A raman regime free-electron laser in a partially dielectric-loaded waveguide
(1990)
A partially dielectric-loaded waveguide supports modes with phase velocity νph>c/∈1/2, where ∈ is the dielectric constant of the lining. The coupling of a fast mode (with νph>c) with a slow mode (with c /∈1/2<νph<c) via a ...