Low-profile 3D distributed conformal wide-range scanning array antenna

Abstract

The present invention provides a low-profile three-dimensional distributed conformal wide-range scanning array antenna. In the topology of the array antenna, the positions of the antenna elements are evenly distributed in a ring shape on a rotating curved surface carrier formed by rotating a reference line around a specific axis; the reference line It is formed by connecting a smooth convex curve with another smooth concave curve. The vertical direction where the right end point of the concave curve is located is the rotation axis; The antenna units are arranged at equal arc intervals; the direction of the units on the rotating surface is the normal direction of the tangent plane corresponding to the position of the antenna unit. The invention is based on the principle of three-dimensional distributed virtual aperture synthesis, combined with a specially designed conformal curved surface carrier to realize the scanning range of the beam in the lower hemispheric airspace of the low profile, and overcomes the problem of limited scanning range of the array antenna under the premise of the low profile.

Description

technical field [0001] The invention belongs to the field of conformal antenna arrays, and in particular relates to a low-profile three-dimensional distributed conformal wide-range scanning array antenna. Background technique [0002] With the wide application of scanning antenna array in many military and civilian fields such as satellite communication and radar, higher and higher requirements are put forward for its scanning range, physical size and performance. Large scanning range. Existing scanning antenna arrays can be mainly divided into two categories: planar scanning antenna arrays and conformal scanning antenna arrays. The planar scanning antenna array has been widely used due to its thin profile, small size, light weight, and easy integration. However, the scanning range of the planar scanning antenna array is generally limited to around ±60°, and the gain drops sharply with the increase of the scanning angle during the scanning process, so it cannot realize a w...

AI Technical Summary

Problems solved by technology

[0003] The existing technology used to realize the ultra-large-range scanning of the hemispherical space adopts a conformal antenna array such as a spherical conformal antenna array (see [1]-[2] for details: [1].B.P.Kumar,C.Kumar,V.S.Kumar and V.V.Srinivasan,"Active spherical phased array design for satellite payload data transmis-sion,"IEEETrans.Antennas Propag.,vol.63,no.11,pp.4783-4791,Nov.2015.[2].Y.F.Wu andY.J .Cheng, "S-band dual circular polarized spherical conformal phased array antenna," 2016IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM), Nanjing, 2016, pp.1-3.) to realize beam scanning in hemispherical airspace , but due to its spherical conformal characteristics, the antenna faces the obvious disadvantage of too high overall profile, resulting in redundant volume, high requirements for carrier space, and difficult assembly in applications.

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