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Design method for array antenna suitable for human body electromagnetic wave imaging security inspection

A technology of array antenna and design method, which is applied in the directions of manufacturing antenna array devices, antennas, antenna arrays, etc., can solve problems such as weak echoes and complex structures, achieve low complexity, improve target signal-to-noise ratio, and facilitate processing and manufacturing. and the effect of subsequent signal processing

Inactive Publication Date: 2019-04-30
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the problems of the existing array antennas with weak echoes on both sides of the human body and complex structures, the present invention provides a design method for array antennas suitable for human body electromagnetic wave imaging security checks. The array antennas designed according to this structure are not only simple in structure , easy to process, and can effectively improve the signal-to-noise ratio of targets on both sides of the human body

Method used

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  • Design method for array antenna suitable for human body electromagnetic wave imaging security inspection
  • Design method for array antenna suitable for human body electromagnetic wave imaging security inspection

Examples

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Embodiment 1

[0018] Embodiment 1: Take the carrier center frequency of 30GHz and the total number of antenna units as an example: figure 1 As shown, the array antenna structure is composed of 128 antenna elements, which are located in two upper and lower rows, with 64 antenna elements in each row. Among them, the antenna units in the first row are Rx 1 —Rx 64 , The antenna units in the second row are Tx 1 —Tx 64 . The wavelength of the emitted electromagnetic wave is =10mm, the overall length of the array antenna d 3 It is (64-1)*10mm=630mm.

[0019] Among them: the first row of antennas from the first antenna element to the fourth antenna element from the left (ie figure 1 The angles between the directions of 2, 3, 4, and 5) and the normal direction of the array are -3.2°, -2.4°, -1.6° and -0.8°, respectively. The fifth antenna element to the sixtieth antenna element The direction is the same as the normal direction of the array, from the sixty-first antenna element to the sixty-fourth ante...

Embodiment 2

[0020] Embodiment 2: Take the carrier center frequency of 30GHz and the total number of antennas as an example, such as figure 1 As shown, the array antenna structure is composed of a total of 160 antenna elements, which are located in the upper and lower rows, with 80 antenna elements in each row. Among them, the antenna units in the first row are Rx 1 —Rx 80 , The antenna units in the second row are Tx 1 —Tx 80 . The wavelength of the emitted electromagnetic wave is =10mm, the overall length of the array antenna d 3 It is (80-1)*10mm=790mm.

[0021] In this array antenna structure, the angles between the direction from the first antenna element to the fifth antenna element and the array normal of the first row of antennas from the left are -3.6°, -2.4°, -1.8°, -1.2 ° and -0.6°; the direction of the sixth antenna element to the seventy-fifth antenna element is the same as the direction of the normal line of the array, and the direction of the sixty-sixth antenna element to the ...

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Abstract

The invention provides a design method for an array antenna suitable for human body electromagnetic wave imaging security inspection. The design method includes the following steps: each row of antenna arrays in an array antenna includes multiple sequentially connected antenna units, the key is that the orientation of the antenna units of each row of antenna arrays is determined by a human body ellipse model, and the orientations of all the antenna units are elliptic vertical lines; and in each row of the sequentially connected antenna units, the orientations of the antenna units on two ends and the normal directions of the arrays are at a certain angle, and the orientations of the antenna units in the middle are the same as the normal directions of the arrays. The design method can realize the array antenna which an orderly receive and transmit electromagnetic waves; and the antenna is simple in structure and easy in processing, and can effectively enhance the signal to noise ratio oftargets on the two sides of a human body.

Description

Technical field [0001] The invention relates to a design method of an array antenna, in particular to a design method of an array antenna that can enhance the imaging effect and is suitable for human electromagnetic wave imaging security inspection. Background technique [0002] In the field of human security inspection, security inspection equipment including X-ray, infrared, terahertz, ultra-wideband, electromagnetic waves, etc. are mainly used. Among them, electromagnetic wave imaging security inspection equipment can detect contraband hidden in clothes and packages under safe radiation power standards, and has safety that does not affect human health. It is also a security inspection technology that is currently advocated and will be gradually popularized. [0003] For the electromagnetic wave imaging security inspection technology, the usually used array antennas are mostly linear array antennas or loop array antennas. The antenna direction is either the same as the normal di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00
CPCH01Q21/0087
Inventor 喻洋成彬彬刘杰安健飞崔振茂赵宇姣周人尹格
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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