Wideband Propagation at Millimeter Wavelengths Through the Dispersive and Absorptive Atmosphere

Authors: Maitra A.¹; Kundu M.²

Source: International Journal of Infrared and Millimeter Waves, Volume 24, Number 11, 200311 , pp. 1841-1851(11)

Publisher: Springer

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Abstract:

The propagation of wideband signals through the atmosphere has been studied at millimeter wavelengths at which the atmosphere exhibits significant dispersion as well as absorption. The wideband signals having a Gaussian spectrum are considered to be propagating at carrier frequencies in the range 10-200 GHz over line-of-sight paths under varying propagation conditions effected by the clear air and raining atmosphere. The propagation effects on the wideband signal are assessed in terms of the percentage change in the width and the group delay suffered by the pulsed envelope, also having a Gaussian shape, and the shift in the mode frequency of the signal. The results of numerical calculations, based on a closed solution of Fourier integral, show that the propagated wideband signal can be significantly affected by the atmosphere depending on rain rate, carrier frequency, path length and signal bandwidth.

Keywords: Millimeter wavelengths; wideband propagation; atmospheric dispersion; rain effects

Document Type: Research article

Affiliations: 1: Institute of Radio Physics and Electronics, University of Calcutta, Calcutta 700 009, India 2: Institute of Radio Physics and Electronics, University of Calcutta, Calcutta 700 009, India. Gobardanga Hindu College, Gobardanga, North 24 Parganas, West Bengal, India

Publication date: 2003-01-01