Communications: directive radio wave systems and devices (e.g. – Determining direction – Scanning
Patent
1990-03-02
1991-04-16
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining direction
Scanning
342 70, G01S 1360
Patent
active
050086782
ABSTRACT:
A plurality of transmitting (14, 16, 18, 20) and receiving antenna elements (22, 24, 26, 28) are formed on a support member (12) which may be mounted on a corner of a vehicle for scanning a pattern including areas on opposite sides of the vehicle corner. In an automotive application, the pattern may include a rear area, and a blind spot on the side of the vehicle adjacent to the rear area. A transmitter (50) is connected to the transmitting antenna elements (14, 16, 18, 20) by a passive phased array (30) such as a planar microstrip Butler matrix, and an electronic switch (52) which sequentially connects the transmitter (50) to inputs of the transmitting array (30). A receiver (62) is similarly connected to the receiving antenna elements (22, 24, 26, 28) by a planar microstrip passive phased array (40), and an electronic switch (64) which sequentially connects the receiver (62) to outputs of the receiving array (40). The support member (12) may be formed into a non-planar shape, or be flexible enough to be bent into a non-planar shape, to conform to a non-planar surface of the vehicle on which the sensor is to be mounted.
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Denson-Low W. K.
Gudmestad Terje
Hughes Aircraft Company
Sotomayor John B.
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