Radar antenna device and optimization method
A radar antenna and antenna technology, 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, etc.
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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 of an altimeter 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 An array element 3 , a fourth array element 4 , a dielectric substrate 5 , and a feed network 6 .
[0033] The first array element, the second array element, the third array element, the fourth array element and the feed network are installed on both sides of the dielectric substrate; the first array element, the second array element, the fourth array element The three array elements 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 ...
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 Y-axis direction is 20.7 mm, and the X-axis direction is 25.8 mm. The first to fourth array elements adopt rectangular microstrip array antennas and are arranged in a 2×2 rhombus shape. The dielectric substrate has 3 layers and a thickness of 1.5 mm. The relative permittivity is 2.65.
[0048] Based on the theory of microstrip array antenna, a 2×2 rectangular microstrip array antenna is designed, using a 3-lay...
no. 3 Embodiment
[0067] image 3 It is an embodiment of a diamond array form of a radar antenna device. The first array element to the fourth array element adopt a diamond array form, and the E plane and the H plane can form a pattern 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 units .
[0069] Antenna arrays have a variety of 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, planar arrays are selected for layout in embodiments of the present invention.
[0070] Selecting the appropriate stepping phase and unit spacing can form a strong directional end-fire array. The present invention adopts a rhombus array. ...
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