Download or read book Mode Conversions in Multimode Waveguides written by Wesley Pierce Ayres and published by . This book was released on 1954 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shortcut to Adiabatic Mode Conversion Based on CGPH in Multimode Waveguide written by 葉啟祥 and published by . This book was released on 2013 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adiabatic Mode Conversion and Bandwidth Analysis Based on CGPH in Multimode Waveguide written by 林宗儀 and published by . This book was released on 2012 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mode Conversion in Anisotropic Dielectric Optical Waveguides written by Andres Albanese and published by . This book was released on 1975 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mode Conversion in Circular Waveguides written by E. Nagelberg and published by . This book was released on 1965 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waveguide Mode Converter and Method Using Same written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A waveguide mode converter converts electromagnetic power being transmitted in a TE.sub.0n or a TM.sub.0n mode, where n is an integer, to an HE.sub. 11 mode. The conversion process occurs in a single stage without requiring the power to pass through any intermediate modes. The converter comprises a length of circular corrugated waveguide formed in a multiperiod periodic curve. The period of the curve is selected to couple the desired modes and decouple undesired modes. The corrugation depth is selected to control the phase propagation constant, or wavenumbers, of the input and output modes, thereby preventing coherent coupling to competing modes. In one embodiment, both the period and amplitude of the curve may be selectively adjusted, thereby allowing the converter to be tuned to maximize the conversion efficiency.

Download or read book On mode conversion in the Earth crust waveguide written by James R. Wait and published by . This book was released on 1972 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adopting an idealized two-dimensional model, the mode conversion problem is solved formally for an abrupt change of waveguide thickness. Some numerical results for the appropriate coupling factors are given. The latter tell us how an incident mode of order m is converted into a mode of order n. It would appear that energy loss due to mode conversion in non-uniform earth-crust waveguides is a relatively unimportant limitation. (Author).

Download or read book The Reduction of Mode Conversion in Overmoded Rectangular Waveguide Bends written by Mehmet Emiroglu and published by . This book was released on 1979 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimization of Aperiodic Waveguide Mode Converters written by and published by . This book was released on 2004 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous studies by Haq, Webb and others have demonstrated the design of aperiodic waveguide structures to act as filters and mode converters. These aperiodic structures have been shown to yield high efficiency mode conversion or filtering in lengths considerably shorter than structures using gradual transitions and periodic perturbations. The design method developed by Haq and others has used mode-matching models for the irregular, stepped waveguides coupled with computer optimization to achieve the design goal using a Matlab optimization routine. Similar designs are described here, using a mode matching code written in Fortran and with optimization accomplished with the downhill simplex method with simulated annealing using an algorithm from the book Numerical Recipes in Fortran. Where Haq et al. looked mainly for waveguide shapes with relatively wide cavities, we have sought lower profile designs. It is found that lower profiles can meet the design goals and result in a structure with lower Q. In any case, there appear to be very many possible configurations for a given mode conversion goal, to the point that it is unlikely to find the same design twice. Tolerance analysis was carried out for the designs to show edge sensitivity and Monte Carlo degradation rate. The mode matching code and mode conversion designs were validated by comparison with FDTD solutions for the discontinuous waveguides.

Download or read book Design of Compact Multi Megawatt Mode Converter written by S. G. Tantawi and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experience gained during recent operation of high power 11.424 GHz rf sources for accelerators led to new, more strict requirements on system components. One of the basic components of such a system is a mode converter that transforms the rectangular waveguide mode into the TE{sub 01} mode in circular waveguide. With such a converter, it is possible to minimize the use of WR90 rectangular waveguide which was shown to be a weak part of the previous system at power levels higher than 100 MW and pulse lengths on the order of a microsecond. We used several methods to design a mode converter with extremely low parasitic mode conversion and compact size. These methods employ HFSS[4] and include multi-parameter searches, concurrent optimization with a mode-matching code Cascade[2], cascading of resulting S-matrices, and tolerance analysis using perturbation techniques. This report describes the design methods and presents results.

Download or read book Efficient Mode Conversion in Gd 5 Y 2 5 Ga Iron Garnet Thin Film Waveguides written by Samuel C. Tseng and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The implementation of periodic reversals of magnetization along the direction of propagation of light, at locations where TE and TM modes become 180 degrees out of phase, is discussed. Two approaches were followed: (1) the conventional electrical serpentine circuit and (2) a novel periodic permalloy structure. Using these techniques, we have observed conversion efficiencies of 92% and 80%, respectively, in two Gd5 Ga1 iron garnet thin film waveguides grown on GGG substrates. Experimental results are examined in the light of the theory of electromagnetic wave propagation through bulk crystals possessing both Faraday rotation and birefringence, adapted to the case of mode conversion in magneto-optic waveguides. (Author).

Download or read book NUMERICAL ANALYSIS OF MODE CONVERSION IN COAXIAL WAVEGUIDE COMPONENTS IN GERMAN written by O. Hoechtl and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mode Order Converting Integrated Optic Waveguides written by Meng-Jang Lin and published by . This book was released on 1992 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Simplified Mode Conversion Program for VLF Propagation in the Earth Ionosphere Waveguide written by Richard A. Pappert and published by . This book was released on 1974 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a variation of an earlier mode conversion program for numerically determining mode conversion coefficients and mode sums for a waveguide which is inhomogeneous along the direction of propagation (invariance normal to the transmitter receiver line is assumed and reflections due to the horizontal inhomogeneity are neglected). Although somewhat more approximate than the earlier program the present version has the advantage of not requiring a full wave fields program for the height gain calculations and can be implemented with about the same ease as a WKB program. It has one advantage over the WKB formulation and that is that mode numbering along the horizontal inhomogeneity is immaterial. The mode conversion program will yield mode conversion coefficients and a mode sum plot for ground based vertical dipole excitation of the vertical electric field at the ground as a function of distance from the transmitter. Since the mode conversion coefficients are independent of transmitter terminator distance, allowance has also been made for incrementing the latter distance and plotting mode sums for the incremented distances.

Download or read book Scattering by a Ferrite Obstacle in a Multimode Waveguide written by Gunars Kemanis and published by . This book was released on 1955 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Delay Distortion Due to Mode Conversion in Multimode Transmission Systems written by S. E. Miller and published by . This book was released on 1963 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Research National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1964 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt: