Broadband +/-45-degree dual-polarized millimeter wave end-on-fire antenna and array thereof

Abstract

The invention discloses a broadband +/-45-degree dual-polarization end-fire millimeter wave antenna and an array thereof. The antenna comprises a top metal layer (1), a first dielectric layer (2), a second metal layer (3), a second dielectric layer (4) and a third metal layer (5) which are sequentially arranged from top to bottom. According to the invention, two orthogonal modes are generated by using the polarization twisting device of the substrate integrated waveguide, so that inclined polarization electromagnetic waves are formed in a far field. The metalized via holes arranged in the substrate integrated waveguide in a bending manner realize reduction of the overall size of the antenna. The antenna is simple in structure. According to the invention, the dual-polarized impedance bandwidth exceeding 24.4% can be obtained, a stable directional diagram is achieved, +/-45-degree dual-polarized electromagnetic waves generated by the antenna can keep a relatively consistent directional diagram in the environment of a mobile phone frame, and the millimeter wave dual-polarized antenna array is particularly suitable for a 5G terminal.

Description

technical field [0001] The invention belongs to microwave and millimeter wave communication, in particular to a broadband ±45° dual-polarization millimeter wave end-fire antenna and an array thereof. Background technique [0002] Compared with 4G, the fifth-generation mobile communication (5G) brings users higher data rates, lower latency, and better mobility. Millimeter wave technology is one of the core technologies of 5G, and it is also one of the important features that distinguish it from previous generations of mobile communications. [0003] The millimeter wave system in the terminal is in the initial stage of commercial use, and there are few studies. Generally speaking, in order to achieve sufficient coverage efficiency, the millimeter-wave antenna in the terminal adopts a multi-beam system, and multiple antennas cooperate to cover different directions. Among them, the design of the end-fire antenna is more difficult than the end-fire antenna, and the volume occupi...

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Problems solved by technology

However, in the complex environment of the terminal, especially the terminal antenna is affected by the metal frame, the impedance bandwidth and pattern will be deteriorated due to the shading effect. For horizontal polarization and vertical polarization, the two polarizations are often affected differently Larger, so the difference in the pattern of the two orthogonal polarizations is large, which leads to the performance being affected when the two polarizations are used in a multiple-input multiple-output system (MIMO)

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