Download e-book for kindle: Analysis of Reflector Antennas by W. V. T. Rusch

By W. V. T. Rusch

ISBN-10: 0126034508

ISBN-13: 9780126034509

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Extra resources for Analysis of Reflector Antennas

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1 Fundamental Properties of Antennas Antenna performance is described in terms of several fundamental properties: gain, directivity, capture area, aperture efficiency, beam efficiency, polarization, phase center, and effective noise temperature. Each of these is considered in this section and, where applicable, interrelationships are shown. 11-6) P(£l)dil •'47Γ where W is the input power to the antenna. The maximum antenna gain is the ratio of maximum radiation intensity Um to the radiation intensity UQ which would be obtained from an isotrope with the same input power.

Symp. , Eaton Electron. Res. , Montreal, Canada, June 1953. 3. Keller, J . , A geometrical theory of diffraction. Proc. Symp. Calculus of Variations and its Applications (L. M . ), p p . 27-50. McGraw-Hill, New York, 1956. 4. Keller, J . , T h e geometrical theory of diffraction. J. Opt. Soc. Am. 52, 116-130 (1962). 5. Sancer, M . , Edge corrections to the physical optics pattern of a paraboloidal reflecting antenna. T R W R e p t . 08051-6008-R0-00. , R e d o n d o Beach, California, November 1968.

6. Tube of geometrical rays. 3 25 GEOMETRICAL OPTICS bundle is sufficiently narrow that there is no first-order variation of intensity transverse to the bundle. In general it will be possible to define the bundle so that dS\ is bounded by lines of curvature with respective radii of curvature Ri ( = AP = DP = BO = CO) and R2{ = AQ=BQ=DR= CR). 2 άφ). After a time δ£ each ray is extended rectilinearly to intersect a second wave front £2 to form dS%. 31-7) may also be derived from diffraction integrals in the limit of vanishing wavelength.

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Analysis of Reflector Antennas by W. V. T. Rusch

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