LENS ANTENNA

摘要

Disclosed is a lens antenna comprising a dielectric lens consisting of a collimating part and an extension part, and an antenna element. The extension part of the lens comprises a substantially flat surface crossed by the axis of the collimating part, and the antenna element is rigidly fixed on the surface. The antenna element is formed by a hollow waveguide and comprises a dielectric insert with one end thereof adjacent to said surface; the size of the radiating opening of the waveguide is determined by the predefined width of the main beam and by side lobe levels of the radiation pattern of the lens antenna. The technical result of the invention is an increase in realized gain value due to the use of a waveguide antenna element with a dielectric insert, which provides impedance matching in a wide frequency bandwidth. The present invention can be used in radio-relay point-to-point communication systems, e.g. for forming backhaul networks of cellular mobile communication, in car radars and other radars, in microwave RF tags, in local and personal communication systems, in satellite and intersatellite communication systems, etc.

主权项

1. A lens antenna comprising: a lens and an antenna element, the lens including a collimating part and an extension part, the collimating part and the extension part being formed integrally from a dielectric material, wherein the extension part comprises a substantially flat surface crossed by an axis of the collimating part; wherein the antenna element is rigidly fixed on said surface, said antenna element is formed by a hollow radiating waveguide with a radiating opening thereof facing the lens, wherein the hollow radiating waveguide comprises transition segment between an input aperture of the hollow radiating waveguide and the radiating opening, the transition segment having a variable cross section; and the antenna element comprises a dielectric insert having the same cross-section shape as the radiating opening, wherein the dielectric insert and the dielectric lens are formed of the same material, and the dielectric insert is formed integrally with the lens.