MCF and focal plane irradiance in millimeter wave systems

Author： Lee J.

ISSN： 1362-3060

Source： International Journal of Electronics, Vol.93, Iss.1, 2006-01, pp. : 53-65

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Abstract

Millimeter waves are potentially useful for high resolution ranging and imaging in low optical visibility conditions such as fog and smoke. Also, they can be used for wide band communications since the currently used spectrum bands are already crowded. However, it is necessary to develop a theoretical and experimental understanding of millimeter wave propagation to assess the performance of millimeter wave systems. The intensity fluctuations and mutual coherence function (MCF) describe atmospheric effects on the millimeter wave propagation. Using the quasi-optical method (QOM), a practical and efficient method is suggested to obtain MCF from the flux measurement in the antenna focal plane. Also, another efficient method was suggested to obtain the intensity distribution of the antenna focal plane from MCF which may be determined using some meteorological data if they are available.