Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Reexamination Certificate
2007-10-30
2007-10-30
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
C342S117000, C342S158000, C342S195000, C342S074000, C342S147000
Reexamination Certificate
active
11071939
ABSTRACT:
The present invention relates to a radar apparatus that forms multiple digital beams based on reflected waves of a transmitted radio wave. A transmit signal is transmitted in a predetermined cycle from one of transmitting/receiving antennas A1to A4arrayed in a row. The antennas A1to A4, each switched between transmission and reception, are arranged such that the ratio of the spacing between one pair of adjacent antennas to the spacing between the other pair of adjacent antennas is 1:2. The reflected waves are received by the respective antennas, and DBF is performed based on the resulting received signals. Eleven-channel DBF is achieved using the four antennas with a space equivalent to six antennas. By achieving multiple channels with a minimum number of antennas, the size and cost of the apparatus can be reduced while also reducing the processing time and thus enhancing the performance.
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Barker Matthew M
Fogg David N.
Fogg & Powers LLC
Fujitsu Ten Limited
Tarcza Thomas H.
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