5G millimeter wave passive orthogonal multi-beam planar array antenna

Abstract

The invention discloses a 5G millimeter wave passive orthogonal multi-beam planar array antenna, comprising an orthogonal excitation common-caliber slot antenna array arranged on an upper-layer feed radiation dielectric substrate, a group of transition structures from substrate integrated waveguide to substrate integrated coaxial cable, and two groups of folding type Cassegrain reflecting surfacewave beam feed networks which are distributed on the lower-layer feed dielectric substrate, the middle-layer feed dielectric substrate and the upper-layer feed dielectric substrate. The orthogonal excitation of the slot antenna array is realized through two substrate integration technologies of substrate integrated waveguide and substrate integrated coaxial cable, so that the common-caliber radiation is realized, and the structure is compact. According to the 5G millimeter wave passive orthogonal multi-beam planar array antenna in the invention, wave beams with different directions can be formed in two planes orthogonal to the space, wave beam scanning in the two planes is independently controlled by two groups of wave beam feed networks, the feed port meets better standing wave characteristics and good isolation degree, which can be realized through a multi-layer PCB process; and integration is easy due to the plane structure.

Description

technical field [0001] The invention relates to antenna technology, in particular to a 5G millimeter wave passive orthogonal multi-beam planar array antenna. Background technique [0002] Multi-beam antennas play an important role in modern communication and radar systems, and are a key technology for 5G mobile communication systems. The multi-beam antenna is a multi-port antenna array, which feeds different input ports to form different beam directions. Through beam combination and adjustment, it can cover a larger communication range with higher gain to achieve multi-point communication and increase communication capacity. Therefore, the multi-beam antenna not only has high practical value but also can reduce the communication cost. In addition, the limited spectrum resources limit the development of wireless communication technology to a certain extent. Multi-beam technology can improve spectrum utilization within limited spectrum resources, which is one of the important...

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Problems solved by technology

[0004] Therefore, the research on 5G millimeter-wave multi-beam antenna technology is of great significance. In addition, substrate integration technology is widely used in microwave millimeter-wave and terahertz frequency bands, and substrate-integrated waveguides and substrate-integrated coaxial cables are the most important components of substrate-integrated technologies. However, the existing multi-beam planar array antennas rarely involve the combination of the above-mentioned two kinds of substrate-integrated transmission lines with the orthogonal feed technology and the beam-forming network to increase the beam scanning dimension

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