Results 211 to 220 of about 5,311 (260)

Circular bends in electron waveguides

Physical Review B, 1990
Etude d'un modele de courbure circulaire determinee par l'angle de courbure et par le rapport entre le rayon interne et la largeur des conduites parfaites asymptotiques. Etude de la probabilite de transmission entre les differents modes entrant et sortant en fonction de l'energie des electrons et de la geometrie de la ...
Sols F, MACUCCI, MASSIMO
openaire   +3 more sources

Waveguide losses in sharply bent circular hollow waveguides

Applied Optics, 1990
Losses in the general class of sharply bent circular hollow waveguides are evaluated theoretically for linearly polarized modes. A theory presented in this paper confirms the experimental results for metallic waveguides obtained previously, when the polarization is perpendicular to the plane of curvature.
M, Miyagi, S, Karasawa
openaire   +2 more sources

Coaxial waveguide to circular cylindrical waveguide junction

IEE Proceedings H Microwaves, Antennas and Propagation, 1985
The abrupt junction between a coaxial waveguide with hollow inner and a cylindrical waveguide has previously been analysed using a moment method for the case where the hollow inner has an infinitesimally thin wall. The paper describes modifications which permit a wall of finite thickness to be accommodated.
A.J. Sangster, D.J. McIntosh
openaire   +1 more source

Leaky modes on circular optical waveguides

Applied Optics, 1976
A nonabsorbing optical waveguide of circular cross section supports leaky modes in addition to the well-known bound modes. The detailed properties of these leaky modes are determined by solving the eigenvalue equation for the modes of a circular dielectric cylinder below their cutoff frequency.
R, Sammut, A W, Snyder
openaire   +2 more sources

Circular sectoral waveguides

IEEE Antennas and Propagation Magazine, 1991
Hollow cylindrical waveguides that have pie-shaped cross sections are described. The explicit equations for the field components of the TE (transverse electric) and TM (transverse magnetic) waves are given, and the modal patterns for a number of modes are plotted.
A. Elsherbeni, D. Kajfez, S. Zeng
openaire   +1 more source

Circular Waveguide System for Trunk Communications

IEEE Transactions on Communications, 1974
9-km waveguides of 70-ram inner diameter (ID) have been inserted from manholes into ducts of polyvinal chloride (PVC). Expansion joints are provided for taking up length variations. Only a slight increase in attenuation was measured for the helix waveguide after the laying works.
Herbert Schnitger, Hans-Georg Unger
openaire   +1 more source

A coaxial-circular waveguide for dielectric measurement

IEEE Transactions on Geoscience and Remote Sensing, 1991
A two-port cell for the dielectric measurement of a variety of materials is described. The cell is a symmetric cylindrical sample holder connected to a coaxial line at each end. The cell has some important differences from the traditional two-port coaxial cell that is commonly used. In the proposed design, the sample is in the shape of a solid circular
Mohammad Reza Taherian, David J. Yuen, Tarek M. Habashy, Jin Au Kong   +3 more
openaire   +1 more source

A 90° fair circular waveguide bend

Review of Scientific Instruments, 2015
We propose a synthesis method to design a 90° bent fair circular waveguide TE01 mode transition based on the non-uniform rational B-spline technique. The transition by this method has advantages of small geometry, high transmission with wide band and high profile fairness. An example of design of such a transition is presented.
Xin-hua Yu, Ji-liang Deng, Wei-ping Cao, Si-min Li, Xi Gao, Yan-nan Jiang   +5 more
openaire   +2 more sources

Dualities in Circular Gyrotropic Disks and Waveguides

Electromagnetics, 1995
Longitudinally magnetized gyroelectric waveguide with circular electric wall boundaries exhibit split limit-TE cut-off numbers but degenerate limit-TM cut-off numbers for non-symmetric modes. The magnetic wall waveguide displays degenerate limit-TE and limit-TM cut-off numbers.
Gibson, A. A P, Davis, L. E., Sheikh, S. I.   +2 more
openaire   +2 more sources

Inhomogeneous Circular Waveguides

1977
This chapter is devoted to the study of guided propagation of electromagnetic waves through a medium characterized by the following dielectric constant variation $$K = K_0 - K_2 \left( {x^2 + y^2 } \right)$$ (5.1) $$= K_0 - K_2 r^2$$ (5.2) where r 2 = x 2 − y 2. Such a medium is commonly referred to as a square-law medium.
M. S. Sodha, A. K. Ghatak
openaire   +1 more source