Slit Radiation Board Structure for Antenna Vibrator Isolation

Solution Overview

Problem

Sheet metal stamping vibrators in 5G Massive Multiple Input Multiple Output (MIMO) base station antennas face challenges in optimizing the cross polarization ratio while maintaining a lightweight structure without adding boundary conditions.

Innovation Solution

The antenna vibrator features a radiation board with slits, support portions, and hollowed-out holes, optimized in length, width, and shape to enhance isolation and cross polarization ratio without additional boundary conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a boundary condition (such as a sheet metal) is added to a sub-array to optimize the cross polarization ratio, then the cross polarization ratio is improved, but the weight of the base station antenna structure increases

Engineering Contradiction:

Improvecross polarization ratioVSAvoidweight of base station antenna structure

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The radiation board is segmented by introducing slits that divide the continuous metal surface into separated regions. This segmentation creates isolation between adjacent radiating elements, optimizing the cross polarization ratio without requiring additional boundary condition sheets, thereby avoiding the weight penalty of added materials.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The radiation board is designed with a porous-like structure through the slits, creating a patterned opening in the metal surface. This porous configuration allows the board to provide both radiation function and isolation function, achieving cross polarization optimization while maintaining the lightweight characteristic of the original single-piece radiation board.

Inventive Principle:

Principle #31Porous materials

2Reliability

If the isolation of the vibrator is optimized by adding a boundary condition, then the cross polarization ratio is improved, but the structural complexity increases

Engineering Contradiction:

Improveisolation of vibratorVSAvoidstructural complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The radiation board is segmented by introducing slits that divide the continuous metal surface into separated regions. This segmentation creates isolation between adjacent radiating elements, optimizing the cross polarization ratio without requiring additional boundary condition sheets, thereby avoiding the weight penalty of added materials.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The radiation board is designed with a porous-like structure through the slits, creating a patterned opening in the metal surface. This porous configuration allows the board to provide both radiation function and isolation function, achieving cross polarization optimization while maintaining the lightweight characteristic of the original single-piece radiation board.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12456825B2Antenna vibrator and antenna

Publication Date: 2025.10.28 SUZHOU LUXSHARE TECH CO LTD

AI summary

The embodiments of the present disclosure provide an antenna vibrator and an antenna, and the antenna vibrator includes a radiation board. A center region of the radiation board is provided with a plurality of slits, and the radiation board is bent downwards at a peripheral region of each slit to form a support portion and a hollowed-out hole. The support portion serves to support and connect. At the same time, by forming the slit on the radiation board, the isolation of the vibrator is optimized, and the cross polarization ratio after the vibrator being arrayed may meet conventional index without adding a boundary condition.