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A radar antenna device and optimization method

A technology of radar antenna and antenna, which is applied in the direction of antenna, antenna array, antenna grounding switch structure connection, etc., can solve the problem that the device and method cannot realize wide and narrow beams at the same time

Active Publication Date: 2022-07-08
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a radar antenna device and an optimization method to solve the problem that the existing devices and methods cannot realize wide and narrow beams at the same time

Method used

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  • A radar antenna device and optimization method
  • A radar antenna device and optimization method
  • A radar antenna device and optimization method

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no. 1 Embodiment

[0032] figure 1 It is an embodiment of a radar antenna device, which can be installed on an aircraft for an antenna for altimetry radar. As an embodiment of the present invention, a radar antenna device includes: a first array element 1, a second array element 2, a third array element Array element 3 , fourth array element 4 , dielectric substrate 5 , feeding network 6 .

[0033] The first array element, the second array element, the third array element, the fourth array element and the feeding network are installed on both sides of the dielectric substrate; the first array element, the second array element, the The third array element and the fourth array element form a rhombus array, the center points of the four array elements are the four vertices of the rhombus, and the first array element, the second array element, the third array element, and the fourth array element are the same radiator.

[0034] In the present invention, the diagonal lengths of the rhombus are dif...

no. 2 Embodiment

[0046] figure 2 It is an embodiment of a rectangular microstrip antenna unit of a radar antenna device, and describes the design parameters of the rectangular microstrip antenna, specifically: the first array element, the second array element, the third array element, and the fourth array element are: The same rectangular microstrip unit.

[0047] In the embodiment of the present invention, the center frequency of the first to fourth array elements is 4.3 GHz, and the dimensions of the first to fourth array elements are length L=0.29λ, width W=0.37λ, that is, along the The Y-axis direction is 20.7mm, and the X-axis direction is 25.8mm. The first to fourth array elements use rectangular microstrip array antennas, which are arranged in a 2×2 diamond shape. The dielectric substrate is 3 layers, with a thickness of 1.5mm. The relative permittivity is 2.65.

[0048] Based on the microstrip array antenna, a 2×2 rectangular microstrip array antenna is designed, using a 3-layer die...

no. 3 Embodiment

[0067] image 3 It is an embodiment of a rhombus array form of a radar antenna device. The first array element to the fourth array element are in the form of a rhombus array, and the E plane and the H plane can form patterns with different beam widths, specifically:

[0068] The first, second, third and fourth array elements form a rhombus array, the center points of the four array elements are the four vertices of the rhombus, and the first to fourth array elements are the same rectangular microstrip unit .

[0069] Antenna arrays have various geometric shapes, such as linear arrays, circular arrays, rectangular arrays, conformal arrays, etc. Planar arrays are more versatile and can provide more symmetrical low sidelobe patterns. Therefore, in this embodiment of the present invention, a planar array is selected for layout.

[0070] Selecting the appropriate stepping phase and unit spacing can form a strong directional end-fire array. The present invention adopts a rhombus ar...

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Abstract

The invention discloses a radar antenna device and a design method, and solves the problem that the existing device and method cannot simultaneously realize wide and narrow beams. A radar antenna device, comprising: a first array element, a second array element, a third array element, a fourth array element, a dielectric substrate, and a feeding network; the first to fourth array elements and the feeding network Installed on both sides of the dielectric substrate; the first to fourth array elements form a rhombus array, the center points of the four array elements are four vertices of the rhombus, and the first to fourth array elements are the same. The method includes: adopting a diamond array form for the first to fourth array elements, and changing the lengths of the two diagonal lines until the beam width meets a set requirement. The invention can be widely used in altimetry radar.

Description

technical field [0001] The present invention relates to the technical field of radio frequency antennas, and in particular, to a radar antenna device and an optimization method. Background technique [0002] In the radar system, the antenna isolation is one of the important indicators of the antenna, which affects the upper limit setting of the receiver sensitivity of the radar near the ground height. The antenna isolation refers to the energy emitted by the transmitting antenna, which is directly coupled to the receiving antenna without ground reflection. Energy ratio, in order to ensure the index of antenna isolation, low sidelobe, narrow beam antenna is required. The altimetry radar antenna is generally installed on the aircraft. Since the aircraft has a certain attitude angle, a wide-beam antenna is required to ensure that the incident wave is radiated to the ground. For the existing altimetry radar antenna installed on the aircraft, it is impossible to achieve both a w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q21/00
CPCH01Q21/00H01Q1/38H01Q1/50H01Q1/36
Inventor 代明珍齐万泉黄承祖刘星汛
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT