Wideband wide-angle scanning phased array antenna based on panel long slot antenna

Abstract

The invention discloses a wideband wide-angle scanning phased array antenna based on a panel long slot antenna, and belongs to the field of radar technology and wireless communications. The antenna comprises an underlying metal floor, a middle-layer dielectric substrate whose upper and lower surfaces are both printed with metal patches, and an upper-layer dielectric substrate, wherein a vertical dielectric substrate, the two side surfaces of which are printed with microstrip gradient lines, is arranged between the middle-layer dielectric substrate and the metal floor, and two metal probes arealso arranged therebetween. When working, the antenna array coaxially feeds to the microstrip gradient lines, and then performs coupled feed on the metal patch on the lower surface of the middle-layerdielectric substrate through the metal patch on the upper surface thereof, so as to form a continuous current, thereby effectively increasing the working bandwidth; the metal probes ensure wide-anglescanning performance by reducing the mutual coupling effect between adjacent antenna elements, and increase the current loop, thereby increasing the resonance point, and further increasing the bandwidth of the antenna. The wideband wide-angle scanning phased array antenna based on the panel long slot antenna in the invention realizes wideband antenna wide-angle scanning, and has the advantages ofsimple structure, easy assembly and easy integration and conformality.

Description

technical field [0001] The invention belongs to the technical fields of radar technology and wireless communication, and in particular relates to a wide-bandwidth angle-scanning phased array antenna based on a flat-panel slot antenna, which is suitable for radar and communication systems such as microwaves and millimeter waves. Background technique [0002] The phased array antenna is developed from the array antenna, and its basic principle is based on the analysis of the array antenna. The beam scanning of the phased array antenna is controlled by the computer to control the initial phase of the antenna unit, thereby controlling the wavefront position of the array antenna to achieve the beam scanning. Therefore, there is no inertia problem, and it has the advantages that conventional antennas do not have, such as fast scanning speed and fast beamforming, and has great flexibility. Phased array antennas are widely used in communication, radar, electronic countermeasures and...

AI Technical Summary

Problems solved by technology

However, in the state of strong mutual coupling, the strong mutual coupling effect of the antenna makes the state of large-angle scanning change greatly compared with that of side-firing, causing large fluctuations in its own active impedance, and it is difficult for the antenna to achieve large-angle scanning.

[0005] In summary, it is difficult for traditional phased array antennas to simultaneously have the capability of wide-band and wide-angle scanning, and the use of coupled strongly coupled dipole antenna arrays also has difficulty in large-angle scanning. The present invention is aimed at these key issues. propose

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