FRESNEL ZONE THEORY.
Interim technical rept.,
MOORE SCHOOL OF ELECTRICAL ENGINEERING UNIV OF PENNSYLVANIA PHILADELPHIA
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This report is concerned with the state of the art of Fresnel zone thoery. Starting with Maxwells equations expressions are obtained for fields, power density, and gain in the near field of aperture antennas. The effect of the size, shape, and aperture distribution of a probe which is used to measure antenna parameters in the Fresnel region and power transfer between antennas located in each others Fresnel region is also discussed. The above quantities are discussed for various aperture distributions and aperture shapes. The effect of obstacles and the ground in the Fresnel region of an antenna on its performance are presented. Various methods, together with their limitations, for measuring Fraunhofer antenna data in the Fresnel region are also discussed. Experimental data have been included whenever available. Author
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation