Conformal spherical antenna array with good shielding effect

Abstract

The invention discloses a conformal spherical antenna array with a good shielding effect. The antenna array comprises a radome (13), an antenna array (14), a shield cover (15) and a base plate (16). The antenna array (14) is arranged on the base plate (16). The shield cover (15) is located between the antenna array (14) and the base plate (16). The antenna array (14) is covered by the radome (13). The base plate (16) is provided with an annular groove (18). The lower edge of the radome (13) is inserted into the annular groove (18) and is positioned by a locking positioning mechanism. The antenna array (14) comprises a first skeleton (1), a second skeleton (2), a third skeleton (3), an antenna (11) and a positioning device (10). The conformal spherical antenna array provided by the invention has the advantages of high antenna radiation uniformity, high structural strength and good shielding effect.

Description

technical field [0001] The invention relates to a conformal spherical antenna array, in particular to a conformal spherical antenna array with good shielding effect. Background technique [0002] The conformal (ellipse) spherical antenna array can realize omni-directional radiation on the hemispherical surface. It has incomparable advantages in many antenna systems. It can be used in ground communication systems, airborne and vehicle-mounted mobile communication systems, and can also be used in radar, positioning, and navigation fields. [0003] There are many types of conformal antenna arrays, such as conical arrays, spherical arrays, and cylindrical arrays. It has the characteristics of a regular planar antenna array, but also has many differences. [0004] The planar array has been very maturely used in many fields, but its scanning angle is generally up to about 60°. The spherical array can cover all directions. This works well in areas like satellite tracking, comm...

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Problems solved by technology

At the same time, the radiation polarization of non-planar array elements is not uniform, so it may lead to high cross-polarization

[0005] The (ellipsoid) spherical structure is difficult to process and the cost is high. The design difficulties mainly include the following points: 1. It is difficult to analyze the characteristics of (ellipsoid) spherical conformal antenna elements and the mutual coupling between elements. 2. The conformal It is difficult to synthesize array antenna patterns, 3. Difficult to control the polarization of conformal array antennas, 4. Complex beamforming and control, 5. Difficult to test (calibrate)

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