Title :
The effects of ground permittivity and surface roughness on multi-path measurements at K-band
Author :
Brunett, J.D. ; Aryanfar, F. ; Entesari, K. ; Yang, T.
Author_Institution :
EECS Dept., Michigan Univ., MI, USA
Abstract :
A number of automotive radar systems have been designed with application to adaptive cruise control, road surface monitoring, accurate speed measurement, and potential application to collision avoidance. In order to construct these high-tech radar systems for the automotive market, a thorough understanding of the residential and highway environments in which they would operate is required. In this paper, a versatile open-ended waveguide measurement technique is used to determine the effective dielectric permittivity of various ground types. From this information, K-band LOS (Line-Of-Sight) propagation above different ground materials are calculated and compared with outdoor measurements. Here the influence of ground permittivity, surface roughness, and ground layer thickness on K-band propagation is presented.
Keywords :
antenna radiation patterns; microwave propagation; permittivity; radar antennas; road vehicle radar; rough surfaces; K-band LOS propagation; K-band radar; asphalt road; automotive radar; effective dielectric permittivity; far field power pattern; grass field; ground layer thickness; ground permittivity; ground types; open-ended waveguide measurement; receiving antennas; standard-gain horn; surface roughness; transmitting antennas; Adaptive control; Automotive engineering; Control systems; K-band; Permittivity measurement; Programmable control; Radar applications; Radar measurements; Rough surfaces; Surface roughness;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1219873
