© The Institution of Engineering and Technology
The polarisation characteristics of a high-voltage power-line radar cross-section (RCS) at 76 GHz are experimentally evaluated to improve the detection conditions of the helicopter obstacle detection radar system. Vertical polarisation transmission and reception (V–V) are normally used to detect power lines. In addition to V–V polarisation, horizontal transmission and reception (H–H) polarisation characteristics are measured for the two types of high-voltage power lines. For V–V polarisation, the measured RCS characteristics of the power lines agree well with those previously reported at 35 and 94 GHz. However, the measured results of the H–H polarisation are almost the same as, or higher than, those of the V–V polarisation.
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Evaluation of polarisation characteristics of power-line RCS at 76 GHz for helicopter obstacle detection