Bragg Scattering Characteristic Evaluation of Thin High-Voltage Power Lines Using Low Transmitting Power Helicopter Forward-Looking 76 GHz Millimeter-Wave Radar

This paper evaluates and discusses the detailed reflection characteristics, including Bragg scattering, of thin high-voltage power lines using a helicopter forward-looking obstacle detection 76 GHz low-transmitting power millimeter-wave radar system. Initially, we provide an overview of the developed radar system, which operates at a center frequency of 76.5 GHz and a transmitting power of 10 dBm, adhering to the low-power radar specifications. Subsequently, we measure the reflection power from thin high-voltage power lines approximately 370 m away with a diameter of around 13 mm. To conclude, a two-dimensional radar scope is employed to investigate the reflection characteristics including Bragg scattering.