An all-metal partial Maxwell fisheye lens wide-angle coverage multi-beam antenna

Abstract

The invention relates to an all-metal partial Maxwell fisheye lens wide-angle coverage multi-beam antenna, which belongs to the technical field of lens antennas. The multi-beam lens antenna cuts a complete two-dimensional Maxwell fisheye lens along a straight line and adopts a feed source array arranged along a straight line, and combines port switching and frequency switching to realize beam wide-angle scanning. There are two assembly modes for the antenna structure. The first assembly mode uses the upper metal cover, the lower metal cover, the upper half of the boss type six-port network, the lower half of the six-port network and the inclined metal ring for installation and connection; the second assembly mode uses the lower metal cover The board, the upper half of the inclined six-port network, the lower half of the six-port network and the flat metal ring are installed and connected. In the two assembly modes, the elevation beam pointing is 0° and 20° respectively, the azimuth beam scanning range exceeds ±90°, and the working frequency range is 33‑36GHz. In a limited space, the beam coverage is improved; at the same time, the feed is arranged in a straight line, which is easy to integrate; the volume is reduced by cutting the lens; it is made of all metal, and the radiation efficiency is high.

Description

technical field [0001] The invention relates to an all-metal partial Maxwell fisheye lens wide-angle coverage multi-beam antenna, which belongs to the technical field of lens antennas. Background technique [0002] With the development of 5G technology and the needs of various communication systems, multi-beam antennas have attracted more and more attention. An antenna with good performance requires that it can achieve full space coverage in a limited space as much as possible, while maintaining the stability of the gain as much as possible. Phased array is a typical multi-beam solution, but it often requires a complex feed network, a large number of T / R components, high cost, inconvenient maintenance, and low cost performance. [0003] Therefore, due to the advantages of low cost, wide frequency band, multi-beam scanning and simple feeding network, the lens antenna is favored by more and more people. Gradient index lenses have been widely used in multi-beam antennas, and ...

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Problems solved by technology

[0005] The purpose of the present invention is to propose an all-metal partial Maxwell fisheye lens with wide-angle coverage and multi-beam aiming at the unstable gain of the existing lens antenna when it scans at a large angle and is not easy to integrate and the complex technical defects of the phased array antenna feeding network. Antenna, the lens antenna is based on the traditional Maxwell fisheye lens antenna, a part is cut to realize the convergence of spherical waves to plane waves, and at the same time, the six feed ports of the feed network are arranged in a straight line along the cutting line for easy integration; In a limited space, the lens antenna realizes the large-angle scanning of the main beam by changing the feeding position of the feed source, which ensures the relative stability of the gain; it also uses the beam frequency scanning brought about by the dispersion characteristics of the Maxwell fisheye lens itself, Improved beam coverage

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