Wide Angle Scanning Phased Array Antenna Using Special Pattern Elements and Its Design Method

Abstract

The invention belongs to the technical field of wide-angle scanning phased array antennas, and discloses a wide-angle scanning phased array antenna using a special pattern array element and a design method thereof. The low-profile phased array adopts a sub-array with a special pattern as an array element, so that the low-profile phased array antenna has a stable gain in a wide range of scanning angles or meets higher gain requirements at large scanning angles; The above-mentioned special pattern has a symmetrical distribution of the maximum gain direction between the normal direction of the array plane and the direction of the maximum scanning angle and close to the direction of the maximum scanning angle, forming the characteristic of the central depression of the pattern; the depth of the central depression of the array element pattern is determined according to the It is required to design, the stronger the directionality of the array factor, the deeper the central depression. On the premise of not changing the array factor of the phased array, the present invention can realize the stable gain of the low-profile phased array antenna in a wide scanning angle range, or meet the requirement of higher gain at a large scanning angle.

Description

technical field [0001] The invention belongs to the technical field of wide-angle scanning phased array antennas, and in particular relates to a wide-angle scanning phased array antenna and a design method using special pattern array elements. Background technique [0002] At present, wide-angle scanning phased array antennas have a wide range of application requirements. In the field of mobile communications, the massive MIMO technology (massive MIMO) applied in 4.5G and 5G requires base station antennas to have wide-angle scanning capabilities to achieve effective and uniform coverage of the cell within the scanning range. In the field of space-borne antennas, for low-earth orbit satellites, the phased array antennas carried by them are also required to achieve effective coverage within the coverage area. Since the vertical height of the near-Earth satellite from the ground is much smaller than the radius of the earth, when the scanning reaches the maximum angle, the dist...

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Problems solved by technology

[0003] To sum up, the current wide-angle scanning phased array antenna generally has problems such as gain drop when scanning at a large angle, or the design of the array element is too complicated.

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