Analysis of Metallic Antennas and Scatters by Branko D. Popovic, Branko M. Kolundzija

By Branko D. Popovic, Branko M. Kolundzija

The authors current a comparatively easy, computer-oriented, basic and unified method of the research of metal antennas and scatterers (of electrically small and medium sizes), dependent mostly all alone unique paintings. the strategy appears to be like to provide superiority over present possible choices by way of circumventing many of the problems encountered by means of these equipment. it's going to be of substantial value to operating antenna engineers and researchers. creation; Modelling of geometry of metal antennas and scatterers; Approximation of present alongside generalised wires and over generalised quadrilaterals; remedy of excitation; Electromagnetic box of currents over generalised floor components; resolution of equations for present distribution; Numerical examples illustrating the alternative of optimal components of the tactic; Numerical examples illustrating the probabilities of the strategy; References; Appendices; Index.

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Handbook of Antenna layout, Vol. 1 - ISBN 9780906048825 Propagation of Radiowaves, 2d version - ISBN 9780852961025

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G. , can strongly influence the development of microstructure with temperature thus affecting the post-consolidation properties of the material. Oxides impede grain growth through anchoring the grain boundaries. In general, the higher the oxygen content of the powder the stronger the effect of oxide phase on the grain size stability with temperature. Consequently, the material resists recrystallisation far beyond its complete densification temperature and retains higher hardness and yield strength at the expense of ductility.

69. , Diamond sawblades and associated products. Triefus Industries Limited. qxd 40 8/27/2005 4:44 PM Page 40 Powder Metallurgy Diamond Tools The tool design and composition of its cutting layer play a key part in economic machining of materials where great demands are made on the tool life, its free-cutting ability and also on the precision of the job, edge quality and surface finish. 1 The Effect of Tool Design on its Performance The tool design has been found of paramount importance especially in the case of circular sawing by means of segmental sawblades.

With circular sawing, the blade rotates in a constant direction at high peripheral speeds of typically 25–65 m/s. qxd 8/26/2005 9:26 AM Page 23 Machining with Diamonds – Theoretical Model 23 behind each individual diamond particle, as shown in Fig. 1, which acts as a support during cutting. To provide enough space for chip removal, parameters characterising the sawing operation have to be considered in conjunction with the composition of the cutting rim so not to thicken the slurry excessively, thus avoiding harsh wear conditions for the matrix.

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