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Monopulse radar apparatus and antenna switch

A monopulse radar and switch technology, which is applied in the directions of antenna arrays, antennas, and measurement devices that are powered on separately, and can solve problems such as loss of meaning and increased processing time.

Inactive Publication Date: 2007-06-20
FUJITSU GENERAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the scanning radar device disclosed in the above-mentioned Patent Document 1 has the following disadvantages: for the installation of the turntable on which the radar sensor is mounted, accurate alignment is required; structure etc.
[0014] For example, if the beam width of the transmitting antenna is widened, false detections outside the azimuth detection area will increase, and if the beam width of the transmitting antenna is narrowed, the number of false detections will decrease. lead to increased processing time
In addition, in the process of scanning the transmission beam in the azimuth detection field, it is meaningless to make the intervals between the elements of a pair of reception antennas unequal as shown in the above-mentioned Patent Document 4.

Method used

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Embodiment approach 1

[0073] FIG. 1 is a block diagram showing the configuration of a monopulse radar device according to the present invention. Here, the radar device shown in FIG. 1 represents the configuration of a general monopulse radar device. On the other hand, the monopulse radar device of the present invention is characterized by the configuration of the transmitting and receiving antenna of the antenna unit, the configuration of the antenna switching unit, and the processing of the signal processing unit based on these configurations, which will be described in detail below. However, in describing the present invention, it is necessary to understand the configuration of a general monopulse radar device. Therefore, first, the configuration and the like of a monopulse radar device to which the present invention is applied will be described.

[0074] The monopulse radar device shown in FIG. 1 is composed of each processing unit whose processing function is divided into large blocks, that is, ...

Embodiment approach 2

[0091] FIG. 7 is a diagram showing detection areas where the center directions of the array antenna A and the array antenna B shown in FIG. 6 are shifted left and right, respectively. In Embodiment 1, the center directions of array antenna A and array antenna B are directed in the same direction, but Embodiment 2 is characterized in that the center directions of array antenna A and array antenna B are respectively shifted left and right. In addition, the configuration of each processing unit including the antenna unit in this embodiment is the same as that in the first embodiment.

[0092] Next, the single pulse processing of this embodiment will be described. In FIG. 7 , first consider a case where any one of array antenna A, array antenna B, and array antenna C performs transmission, and array antenna A and array antenna B perform monopulse processing. In this case, it is possible to detect the azimuth of an object present in the detection area R2 near the center of the are...

Embodiment approach 3

[0099] FIG. 8 is a diagram showing an antenna configuration of an antenna unit according to Embodiment 3. FIG. In the antenna unit of this embodiment, in the planar array antenna of Embodiment 1 or Embodiment 2, antenna elements are arranged such that the interval between the second antenna element group and the third antenna element group from the left is slightly enlarged. On the other hand, each array antenna is configured by using four antenna elements in the elevation direction as an antenna element group to form three array antennas, array antenna D, array antenna E, and array antenna F, in which two antenna element groups are combined. The configuration of each of these antennas is different from the configuration of Embodiment 1. The array antenna F is composed of the first and second antenna element groups from the left, and the array antenna E is composed of the third and fourth antenna element groups from the left. , the array antenna F consists of the fifth and six...

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Abstract

It is possible to effectively configure an antenna system of simple structure in a limited space. A mono pulse radar device includes an antenna unit having an array antenna (wide-beam array antenna)(area K1) formed by a part of the antenna element as a constituting element of the antenna unit and narrow-beam array antennas formed with a narrower beam width than the array antenna. Mono pulse processing is performed according to an output of a predetermined pair of array antennas (areas K2, K3) among the plurality of array antennas formed as the narrow-beam array antennas.

Description

technical field [0001] The present invention relates to a monopulse radar device, and more particularly, to a monopulse radar device in which antenna elements are efficiently arranged in a limited space, and an antenna switch for selectively connecting a plurality of antennas of the monopulse radar device to a transmitting and receiving unit. Background technique [0002] As a radar device for detecting azimuth information of a target object in addition to information on the distance and speed of the target object, there is disclosed a radar sensor (radar sensor) that is rotated by a turntable to detect the angle of the turntable to detect the target object An example of a scanning radar (scan radar) device with an angle of arrival (for example, refer to Patent Document 1). [0003] Also, as a conventional non-mechanical radar device, a monopulse radar device that detects an angle of arrival using a phase comparison monopulse method is disclosed. Among them, there is a mono...

Claims

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Application Information

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IPC IPC(8): G01S13/44H01Q25/02G01S7/02H01Q3/30H01Q21/06G01S13/931
CPCH01Q25/02G01S13/4445G01S13/4454G01S13/931
Inventor 本田加奈子冈谦治米田公久
Owner FUJITSU GENERAL LTD
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