Wide-angle scanning millimeter wave array antenna

Abstract

The invention discloses a wide-angle scanning millimeter wave array antenna. The wide-angle scanning millimeter wave array antenna comprises a radiating antenna array and a periodic metal coating structure, the radiating antenna array comprises at least one broadband resonant antenna unit, the periodic metal coating structure is arranged above the radiating antenna array and is an inclusion material consisting of dielectric layers with the same dielectric constant and periodically arranged metal patterns; and a certain distance is kept between the periodic metal coating structure and the radiating antenna array. The periodic metal coating structure is arranged above the radiation antenna array, and the height from the coating structure to the array antenna and the characteristics of the periodic metal material are adjusted, so that the radiation pattern of the antenna unit can be broadened to a great extent, and the beam scanning angle of the whole antenna array is increased; meanwhile, the isolation between the antenna units and the gain of the antenna array are also improved; meanwhile, the antenna is simple in design process, low in cost, stable in structure, mature in processing technology, high in yield and suitable for large-scale mass production.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a wide-angle scanning millimeter-wave array antenna. Background technique [0002] The applied millimeter-wave technology is a hot topic in academia and industry. At the 2019 World Radiocommunication Conference (WRC-19), a globally unified millimeter-wave frequency band was determined for International Mobile Telecommunications (IMT). Currently, the world's main 5G millimeter-wave The frequency bands are 24.25-27.5GHz, 37-43.5GHz, 45.5-47GHz, 47.2-48.2GHz and 66-71GHz. In mobile terminals, due to the presence of Sub-6GHz antennas, metal baffles and screens, the space for millimeter-wave arrays is very limited. Therefore, higher requirements are placed on antenna arrays with wide scanning angles in the millimeter-wave band and miniaturization. [0003] With the division of millimeter-wave frequency bands in the field of mobile communications, more and more scholars h...

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Problems solved by technology

[0003] With the division of millimeter-wave frequency bands in the field of mobile communications, more and more scholars have begun to design millimeter-wave antennas, but due to the limitations of millimeter-wave antenna units, they cannot meet the needs of the communication field very well, so it is necessary to combine unit antennas With the introduction of array antennas, the phase-scanning capability of antenna arrays has become an important technical indicator in mobile terminal communications; since simple array antennas cannot meet the wide-angle scanning requirements of millimeter-wave terminals, the current millimeter-wave A wave array antenna will take a different approach to improve the phase sweep angle

In order to achieve wide-angle scanning performance, there are two key factors: smaller element spacing and wider element pattern, so this requires that the element spacing in the array antenna must be relatively small, otherwise grating waves will be generated during scanning lobes, but a small spacing will cause coupling between antenna elements, which will lead to the deterioration of the performance of the array antenna. How to realize the wide-angle scanning of the array antenna in a small volume has become an important issue in the design of millimeter-wave array antennas.

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