Electrically large highly-efficient luneberg lens antenna with the smallest layering number

Abstract

The invention discloses an electrically large highly-efficient luneberg lens antenna with the smallest layering number, which is applied to wideband high-capacity satellite communication. The basic structure of the antenna comprises a semispherical luneberg lens antenna, a highly-efficient Ku / Ka feed source, a metal baffle board and dual quarter annular guide rails, wherein the semispherical luneberg lens antenna adopts polytetrafluoroethylene as an outer layer, adopts polyethylene as an inner core, and is fixed on the surface of the metal baffle board; the feed source can slide along the dual annular guide rails, and simultaneously can radially regulate a focal length, so that incident wave beams of the feed source in the different frequency ranges of Ku and Ka can cover the lens antenna to different extents, and can be aligned with a satellite for tracking and uplink or downlink communication. Based on the basic structure, industrial plastic material sorts, a board number and board connecting ways are rationally changed to form other specific embodiments.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering and relates to a dielectric lens antenna, in particular to a high-performance two-layer Luneberg lens antenna based on industrial-grade plastic materials used in broadband and large-capacity satellite communications. Background technique [0002] With the rapid growth of demand for satellite broadband multimedia services, in order to ensure high reliability and high utilization of services such as high-speed satellite communications, broadband digital transmission, and high-definition TV live broadcast, new requirements are put forward for ground station antennas: high gain, broadband or Multi-frequency bands, flexible lines, circular polarization and low cross-polarization components, multiple beams in a wide angle range and low cost, etc. Based on such premise, the present invention designs a high-efficiency Luneberg lens antenna for Ku / Ka frequency band satellite communication. [...

AI Technical Summary

Problems solved by technology

In 2003, Sébastien Rondineau et al. published in IEEE Antennas Wieless Propagat.Lett., vol.2, pp.163-166, 2003 entitled "A Sliced ​​Spherical Luneburg Lens" proposed layered and different sizes of holes in each layer To realize the Lunberg lens antenna so as to avoid making the whole lens medium, but the antenna efficiency is very low, at 26.5GHz, the efficiency is only 30%, at 32GHz, the efficiency is only 15%, and the processing is difficult, and the firmness of each layer of dielectric sheet combination also needs to be studied

Although this process can avoid the inconsistency of the dielectric constant caused by the thick dielectric material of the whole hemisphere, the shrinkage ratio of the surface and the internal material is different, and the uniformity is difficult to control, but the mold structure is complex, requiring many processing components, and the processing is difficult.

Images