초록 ▼

An automobile collision avoidance radar antenna alignment system includes a first interferometer (506) with antennas (501) and (503) for alignment along an azimuth (x) axis of the collision avoidance radar antenna, and a second interferometer (508) with antennas (502) and (504) for alignment along a

An automobile collision avoidance radar antenna alignment system includes a first interferometer (506) with antennas (501) and (503) for alignment along an azimuth (x) axis of the collision avoidance radar antenna, and a second interferometer (508) with antennas (502) and (504) for alignment along an elevation (y) axis of the collision avoidance radar. Difference azimuth (.DELTA..sub.AZ) and difference elevation (.DELTA..sub.EL) outputs of the interferometers (506) and (508) are added (.DELTA..sub.T =.DELTA..sub.AZ +.DELTA..sub.EL) with the amplitude of (.DELTA..sub.T) provided at a power detector (526). Sum azimuth (.SIGMA..sub.AZ) and sum elevation (.SIGMA..sub.AZ) are added (.SIGMA..sub.T =.SIGMA..sub.AZ +.SIGMA..sub.EL) with the amplitude of (.SIGMA..sub.T) provided to a power detector (547). To align a collision avoidance radar antenna, the antennas of the antenna alignment system are positioned with a centerline parallel to the thrust vector of the automobile using a laser beam fixture 204. Azimuth and elevation translation errors (.DELTA.x) and (.DELTA.y) between antennas of the antenna alignment system and the antenna of the collision avoidance radar are removed by moving the antenna alignment system until the total difference signal (.DELTA..sub.T) is a minimum. The angle (.alpha.) between the boresite of the collision avoidance radar antenna and the thrust vector of the automobile is set to zero by adjusting the collision avoidance radar antenna until the total sum signal (.SIGMA..sub.T) is a maximum.

대표청구항 ▼

[ What is claimed is:] [10.] An automobile collision avoidance radar antenna alignment system comprising:a first pair of antennas;a second pair of antennas;a first interferometer having inputs receiving outputs from the first pair of antennas, and providing a sum output and a difference output;a sec

[ What is claimed is:] [10.] An automobile collision avoidance radar antenna alignment system comprising:a first pair of antennas;a second pair of antennas;a first interferometer having inputs receiving outputs from the first pair of antennas, and providing a sum output and a difference output;a second interferometer having inputs receiving outputs from the second pair of antennas, and providing a sum output and a difference output;a first hybrid combiner having a first input receiving the sum output of the first interferometer, a second input receiving the sum output of the second interferometer, and providing an output;a second hybrid combiner having a first input receiving the difference output of the first interferometer, a second input receiving the difference output of the second interferometer, and providing an output;a first local oscillator;a first downconverter having a first input coupled to the output of the second hybrid combiner, a second input coupled to the first local oscillator, and having an output;a first power detector having an input coupled to the output of the first downconverter, the first power detector for providing a signal indicating a sum of the difference output from the first interferometer and the difference output from the second interferometer;a second downconverter having a first input coupled to the output of the first hybrid combiner, a second input coupled to the first local oscillator, and having an output; anda second power detector having an input coupled to the output of the second downconverter, the second power detector for providing a signal indicating a sum of the sum output from the first interferometer and the sum output from the second interferometer.