A radar head module includes a high-frequency circuit that sends and receives a radar beam for a radar, a case that covers the high-frequency circuit, and a mounting member for attaching the radar head module to an outside body on which the radar head is to be mounted. High-frequency circuits are attached...http://www.google.se/patents/US6909405?utm_source=gb-gplus-sharePatent US6909405 - Radar head module
