A Planar Lumberg Lens Antenna Based on Sparse Phased Array Feeding

Abstract

The purpose of the present invention is to provide a plane Lunberg lens antenna based on sparse phased array feeding, which belongs to the technical field of antennas. The antenna compresses the spherical Lumberg lens antenna into a plane structure through optical transformation, and then uses an optimization algorithm to optimize a large-spacing sparse feed array that matches the plane lens structure. The excitation amplitude does not change under different scanning angles to ensure the EIRP index within the scanning range; at the same time, the antenna also has the advantages of high gain, low profile and low cost, which has strong engineering practicability.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a plane Lumberg lens antenna based on sparse phased array feeding. Background technique [0002] With the rapid development of wireless communication technologies such as 5G and low-orbit satellite communication, the application scenarios of wireless communication are becoming more and more complex. As an important device in a wireless communication system, the performance requirements of the antenna are becoming higher and higher. In wireless communication scenarios such as 5G and low-orbit satellite communication, there are practical applications such as long-distance communication, beam alignment, and small space assembly. Therefore, antennas are required to have high gain, fast beam switching, and low profile requirements. [0003] Phased array antennas are the most widely used beam scanning antennas in communication systems. They have the capabilities of fast w...

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Problems solved by technology

[0006] In the paper "Wide-Angle Scanning Lens at 28 GHz Fed by AntennaArray", Zhishu Qu et al. organically combined a high-gain and low-cost lens antenna with a phased antenna with large-angle fast electrical scanning. Although the scanning capability of ±58° is achieved, However, as the scanning angle of the 3D dielectric lens increases, the number of units excited by the feed array decreases, resulting in a significant decrease in the equivalent isotropic radiated power (EIRP) of the system index, which seriously restricts the use of ultra-high-gain wireless communication scenarios; electronic technology In the "Research on Phased Lens Antenna Technology", the team of Professor Qu Shiwei of the University took EIRP as the optimization goal, and achieved a scanning range of ±15° by using a 4×4 phased array with full power to irradiate the transmission array; however, due to the large number of transmission arrays The layer structure and the full array arrangement of feed sources require 16 TR channels to realize beam scanning, which is expensive

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