Patent ID: 7498973

Claim:
A radar transducer comprising: an antenna for transmitting electromagnetic waves at a predetermined frequency and for receiving reflected waves at a second frequency Doppler shifted from the predetermined frequency; a microwave transceiver for supplying to and receiving from the antenna the electromagnetic waves and detecting a Doppler frequency; an output cable; an electrical processing section mounted on a circuit board for processing the Doppler frequency and for communicating with the output cable; and a housing for containing the antenna, the microwave transceiver and the electrical processing section and for receiving and locating an inner end of the output cable; wherein the microwave transceiver is shielded by a metallic shield surrounding the microwave transceiver leaving the electrical processing section exposed outside the metallic shield; wherein the antenna comprises a substantially planar array; wherein the housing comprises a mounting element providing mountings thereon for the antenna, the microwave transceiver, the metallic shield, the electrical processing section and an inner end of the cable, the mounting element including a generally plate shaped portion with a front face defining a support for the planar antenna array and a rear face for supporting the microwave transceiver and the metallic shield; wherein the housing comprises a receptacle element defining a generally flat radome; wherein the receptacle element has an open end face at one end of the radome with the open end face lying in a plane generally at right angles to the radome; the mounting element carrying the antenna, the microwave transceiver, the metallic shield, the electrical processing section and an inner end of the cable being inserted as a common assembly through the open end face into the receptacle element so that the generally plate shaped portion lies generally parallel to the radome, and a potting compound closing the open end face of the receptacle element and enclosing the mounting element, the antenna, the microwave transceiver, the metallic shield, the electrical processing section and an inner end of the cable within the receptacle element.