JPH0534433A - Radar - Google Patents

Abstract

PURPOSE:To provide a radar which can restrain load fluctuations and be operated with low-cost power facility by forming an antenna beam in a direction having no relation to searching during a transmission blank so as to continue transmission. CONSTITUTION:While scanning is performed in the direction of an angle of elevation by each phase shifter 12 via a beam control portion 14 in response to a beam-oriented angle control signal 50 output from a control and timing processing portion 23, a transmitted signal for scanning in the direction of an azimuth through one cycle Tsec is given a phase, whereby a transmitted beam 1 is obtained. When a residential area or a wireless station, etc., in danger of causing interference is judged to exist in the direction of the azimuth a transmission blank (non-transmission) is set 80 by a keyboard, etc., and input to a display control processing unit 30. A transmit beam is formed in the direction other than that of the residential area or the wireless station in danger of causing interference and transmission of the beam is continued and so load fluctuation can be restrained and the radar can be operated with low-cost power facility.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radar apparatus having a phased array antenna, and more particularly to a radar apparatus which suppresses load fluctuation when the radar apparatus is regarded as a power source load.

[0002]

2. Description of the Related Art FIG. 2 (a) is a conceptual diagram showing a conventional beam scanning. In FIG.
Ordinary transmission beam that scans in the azimuth direction with one rotation Tsec, 2 is a beam that is used as a transmission blank (non-transmission) when there is a residential area or a radio station that may cause interference in the azimuth direction. is there. 2 (b) is a load fluctuation diagram showing the load fluctuation corresponding to FIG. 2 (a) when the radar device is used as a power source load.

FIG. 3 is a block circuit diagram showing a block configuration of a radar device for forming such a transmission beam pattern. In the figure, 11 is an element antenna for transmitting and receiving transmitted and received signals, and 12 is a transmitted signal. A phase shifter for phase-shifting the transmission pattern formation and the reception signal, a divider 13 for distributing the transmission signal to each phase shifter 12, and a reference numeral 14 for shifting the phase shifter 12 with the beam-oriented angle control signal 50 as an input. A beam control unit 10 for outputting and controlling a phase shifter control signal 15 is a phased array antenna having the element antenna 11, the phase shifter 12, the distributor 13, and the beam control unit 14, and 2.
Reference numeral 1 is a transmission / reception processing unit that processes a transmission / reception signal 40, 22 is a signal processing unit that processes a signal obtained by converting an analog signal into a digital signal by the transmission / reception processing unit 21, and 23 is a control that controls the transmission / reception processing unit 21 and performs timing processing. , A timing processing unit, 20 is the transmission / reception processing unit 21, the signal processing unit 2
2, a signal processing device having a control and timing processing unit 23, 31 is a display signal 6 output from the signal processing device 20.
0 is a display control processing unit, 70 is a display control processing unit 3
Reference numeral 30 denotes a display control processing device having the above-mentioned display control processing unit 31, which is a control signal output from 1 and controlling the control and timing processing unit 23.

Next, the operation will be described. A transmission signal for scanning in the azimuth direction at one rotation Tsec while scanning in the elevation angle direction by each phase shifter 12 via the beam control unit 14 by the beam control angle control signal 50 output from the control / timing processing unit 23. And a transmission beam 1 is obtained. If it is determined from the image displayed by the display control processing device 30 that there is a residential area in the azimuth direction, or a wireless station that may cause interference, the transmission blank (conceptually shown in FIG. Blank setting 80 is performed on the (non-transmission) 2 using a keyboard or the like, and is input to the display control processing device 30.

If the transmission pattern shown in FIG. 2 (a) is transmitted from the above radar device, when the radar device is regarded as a power source load, when the transmission blank 2 is used, as shown in FIG. A sudden load change corresponding to a) occurs.

[0006]

Since the conventional radar device is constructed as described above, the load fluctuation becomes large when the transmission is blank, and the power supply equipment for supplying power to the radar device has a voltage fluctuation with respect to the load fluctuation. However, there is a problem that it is necessary to prepare a power supply facility that is less expensive.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a radar apparatus capable of suppressing load fluctuations at the time of transmission blank and using an inexpensive power supply facility. .

[0008]

A radar device according to the present invention is directed to a direction unrelated to detection at a time when a transmission blank is required, that is, a direction away from a residential area or a radio station which may cause interference. A beam is formed and transmission is continued to suppress load fluctuation.

[0009]

According to the present invention, a transmission beam is formed in a direction unrelated to detection at the time when a transmission blank is required, that is, in a direction away from a residential area or a radio station that may cause interference, and transmission is continued. Since this is done, the load fluctuation can be suppressed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a conceptual diagram showing beam scanning according to an embodiment of the present invention. In the figure, 1 is a normal transmission beam scanning in the azimuth direction with one rotation Tsec while scanning in the elevation angle direction. 2 conceptually shows a transmission beam formed at a time when a transmission blank is required. Further, FIG. 1 (b) is a load fluctuation diagram corresponding to FIG. 1 (a) when the radar device is viewed as a power source load. The structure of the radar device is the same as that of the conventional example shown in FIG.

Next, the operation will be described. A transmission signal for scanning in the azimuth direction at one rotation Tsec while scanning in the elevation angle direction by each phase shifter 12 via the beam control unit 14 by the beam control angle control signal 50 output from the control / timing processing unit 23. And a transmission beam 1 is obtained. Further, when it is determined from the image displayed by the display control processing device 30 that there is a residential area in the azimuth direction or a wireless station that may cause interference, the transmission blank conceptually shown in FIG. A blank setting 80 is made for (non-transmission) using a keyboard or the like, and is input to the display control processing device 30.

Here, at the time when the transmission blank is required,
The transmission beam 1 is conceptually shown in FIG. 1 (a) in a direction unrelated to detection, and in a direction that does not interfere with other transmission beams.
Are formed to continue the transmission operation. Therefore, since the transmission operation is continued, load fluctuation when this radar device is viewed as a power source load can be suppressed as shown in FIG. 1 (b). It should be noted that no reception process is performed for this transmission beam 3.

In this embodiment as described above, a direction unrelated to detection, that is, a residential area, is set at the time when the transmission blank is required.
Alternatively, a transmission beam is formed in a direction away from a wireless station or the like that may cause interference, and transmission is continued, so that load fluctuations can be suppressed and inexpensive power supply equipment can be used.

[0014]

As described above, the radar device according to the present invention avoids a direction irrelevant to detection, that is, a residential area, or a radio station that may cause interference at the time when a transmission blank is required. Since the transmission beam is formed in the opposite direction and the transmission is continued, it is possible to suppress the load fluctuation, and it is not necessary to prepare a CVCF or a high-speed voltage compensator or a power supply facility with a large margin of power supply capacity. There is an effect that it can be completed with inexpensive power supply equipment.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of beam scanning according to an embodiment of the present invention and a load variation diagram when a radar device is viewed as a load.

FIG. 2 is a conceptual diagram of conventional beam scanning and a load variation diagram when a radar device is viewed as a load.

FIG. 3 is a block circuit diagram showing a block configuration of a radar device.

[Explanation of symbols]

1 Normal transmission beam 3 Transmission beam formed at a time when a transmission blank is required

Claims (1)

Claim: What is claimed is: 1. A radar apparatus having a phased array antenna, wherein an antenna beam is formed in a direction irrelevant to detection during transmission blanking to continue transmission. A characteristic radar device.