REFLECTION CHARACTERISTICS MEASUREMENT FROM A TRUCK AND A PASSENGER CAR AT 60 GHZ FREQUENCY BAND

Recently, studies and developments of Collision Warning System (CWS) h ave attracted widely a particular attention among various wave applica tions at 60 GHz frequency band. Major performance of the CWS is given by the maximum detection range, the minimum detectable width and accur acy of detection distance. Since the maximum detection range and the m inimum detectable width depend on a size of a target, it is important to know Radar Cross Section (RCS) of the target. RCS data should be me asured so-called far field condition (greater than a few hundreds mete rs). while CWS is usually used in the range of 20-100 m. Therefore, a measurement of the reflection characteristics in shorter distance shou ld be necessarily known. In this study, we present reflection characte ristics of a medium size truck and a passenger car measured in open fi eld at 60 GHz frequency. It is concludingly described that the reflect ion characteristics of the passenger car and the medium size truck are 13-18 dBm(2) and 15-32 dBm(2), respectively, for a case of horizontal polarization.