Millimeter wave cross scanning multi-beam array antenna based on common-cavity Rotmann lens

Abstract

The invention belongs to the technical field of array antennas, and particularly provides a millimeter wave cross scanning multi-beam array antenna based on a common-cavity Rotmann lens, a topological structure of the common-cavity Rotmann lens is adopted to feed the millimeter wave cross scanning multi-beam array antenna, the topological structure is composed of two groups of orthogonal sub-networks, each group of sub-networks is only composed of a feed source contour and inner and outer array contours (a virtual port of a traditional Rotmann lens is not added), the two groups of Rotmann lenses are orthogonally placed and form a closed common cavity (common-cavity Rotmann lenses), and the two groups of sub-networks are ensured not to be overlapped and interfered through the constraint design of the common-cavity Rotmann lenses. The input port can be switched to realize different directional angles, and the output port is connected with the radiation structure; according to the multi-beam array antenna designed based on the common-cavity Rotmann lens, the integrated design of a cross scanning feed network and a radiation structure can be realized, and the design complexity and the occupied area of the feed network are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of array antennas, and in particular relates to a millimeter-wave cross-scanning multi-beam array antenna fed by a substrate-integrated waveguide co-cavity Rotman lens, which integrates two groups of sub-feeding networks for cross scanning, Effectively reduce the design complexity and occupied area of ​​the feeding network. Background technique [0002] Millimeter-wave multi-beam array antennas have been widely used in various scenarios, such as wireless communications, radar, and imaging. Generally, multi-beam array antennas can be divided into two categories: one-dimensional scanning and two-dimensional scanning. The pattern of one-dimensional scanning multi-beam array antennas is often scanned around the azimuth or elevation angle, while the two-dimensional scanning can be around the azimuth angle at the same time. and the elevation angle for scanning; wherein, the two-dimensional scanning has a special ...

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Problems solved by technology

[0003] The document "On the mapping by a cross-correlation antenna system of partially coherent radio sources" uses cross scanning for remote brightness temperature distribution testing; the document "ZIROFFAndreas et al. Self-calibration of a 3-D-digital beamforming radar system for automotive applications with installation The three-dimensional digital beamforming radar system in "behind automotive covers" and the millimeter-wave imaging system in the literature "TELLO Juan et al. It is often decomposed into two sets of one-dimensional scanning that work independently for design, because the two sets of feed networks are not easy to achieve integrated design

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