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Radar apparatus

A radar device and component technology, which is applied to measurement devices, radio wave reflection/re-radiation, utilization of re-radiation, etc. High angular accuracy and the effect of reducing side lobes

Inactive Publication Date: 2011-02-23
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in general, there are problems that the side lobe becomes high, false detection occurs, and angle measurement accuracy deteriorates.
In addition, there is a problem that the amplitude and phase between antenna elements change due to temperature changes or aging, and the gain and angle measurement performance after beamforming deteriorate.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0053] Figure 6 It is a system diagram showing the configuration of the radar device according to Embodiment 1 of the present invention. This radar device includes an antenna 10, a transceiver 20, and a signal processor 30a.

[0054] The antenna 10 is composed of an antenna radiating element 11 and a plurality of antenna receiving elements 12 . The antenna radiating element 11 converts a radiating signal transmitted from the transceiver 20 as an electric signal into an electric wave and sends it out to the outside. The plurality of antenna receiving elements 12 receive external radio waves, convert them into electrical signals, and send them to the transceiver 20 as received signals.

[0055] The transceiver 20 includes a transmitter 21 and a plurality of mixers 22 provided corresponding to the plurality of antenna receiving elements 12 . The transmitter 21 generates a transmission signal and sends it to the antenna radiating element 11 and a plurality of mixers 22 . The ...

Embodiment 2

[0115] Such as Figure 12 As shown in (a), when there are a plurality of reflection points in the same range in the detection Σ beam, if the angle measurement beam also includes a plurality of reflection points, the error of the angle measurement value may become large. As a countermeasure against this, the radar device according to Embodiment 2 of the present invention is such as Figure 12 (b), Figure 12 As shown in (c), the beam is shaped so that the angle measurement beam does not contain a plurality of reflection points, and the directing direction is changed. Figure 13 This shows the angle measurement range when the angle measurement beam (Σ beam, Σ2 beam) is formed.

[0116] Figure 8 It is a system diagram showing the configuration of the radar device according to the second embodiment of the present invention.

[0117] This radar device is configured by adding a beam forming unit 38 to the signal processor 30 a of the radar device according to the first embodime...

Embodiment 3

[0148] Figure 14 It is a system diagram showing the configuration of the radar device according to the third embodiment of the present invention. This radar device is configured by adding a correction circuit 39 to the signal processor 30b of the radar device according to the second embodiment. The correction circuit 39 calculates a correction coefficient based on the signal output from the FFT unit 32 and sends it to the DBF unit 33 .

[0149] Figure 15 It is a flowchart showing the operation of the radar device according to the third embodiment of the present invention. The flow chart is in Figure 9 The shown flow chart showing the operation of the radar device according to the second embodiment is configured by adding a correction coefficient calculation process (step S31 ) between steps S11 and S12 . Next, the procedure for performing the same or equivalent processing as that of the radar device according to the above-mentioned embodiment 2 is added with Figure 9 ...

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Abstract

A radar apparatus comprises: an antenna (10) including a transmitting / receiving element (11a), which has been divided into first and second transmitting / receiving elements, and further including a receive-only element (12a), which has been divided into first and second receive-only elements; a beam shaping unit (34) that divides an observation angle range into a plurality of divisional angle ranges and uses elements of the antenna to form transmission beams covering the respective divisional angle ranges and that, during reception, sets the beam orientations of the elements of the antenna to be the same as those of the first and second transmitting / receiving elements, uses the first transmitting / receiving element and first receive-only element and the second transmitting / receiving element and second receive-only element to form Sigma and Delta phase mono-pulse beams covering the respective ones of the plurality of angle ranges, and uses the first and second transmitting / receiving elements and first and second receive-only elements to form beams having narrow beam widths; and an angle measuring unit (37) that performs a mono-pulse angle measurement based on the beams formed by the beam shaping unit.

Description

technical field [0001] The present invention relates to a radar device for observing the direction (angle) of a vehicle or the like. Background technique [0002] When a radar device is used to observe a vehicle running on a road, a small antenna is used. figure 1 It is a system diagram showing the configuration of a conventional radar device. figure 2 is a flowchart showing the operation of the radar device. This radar device includes an antenna 10 , a transceiver 20 , and a signal processor 30 . [0003] The signal swept by the transmitter 21 inside the transceiver 20 is transmitted from the antenna radiating element 11 . On the other hand, the signals received by the plurality of antenna receiving elements 12 are frequency-converted by the plurality of mixers 22 and sent to the signal processor 30 . The signal from the transceiver 20 is input to the signal processor 30 (step S201), the signal is converted into a digital signal by the AD converter 31, and sent to the ...

Claims

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Application Information

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IPC IPC(8): G01S13/93G01S7/02G01S13/44G01S13/34G01S13/931
CPCG01S13/4445G01S13/34G01S13/48G01S13/44G01S13/931
Inventor 竹谷晋一川端一彰大须贺万城吉田卓司吉田大广丹羽雅人后藤秀人
Owner KK TOSHIBA
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