Antenna Module Shielding Structure for Isolation in Compact Arrays
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Solution Overview
Problem
The miniaturization of 5G antenna elements for mobile devices leads to reduced antenna gain due to decreased distance between antennas, resulting in poor electromagnetic interference shielding and signal interference.
Innovation Solution
An antenna module is designed with a plate body featuring arrayed antenna structures and shielding structures, including concave portions and dielectric materials between them, creating a substrate that enhances impedance characteristics and reduces signal interference by forming a discontinuous impedance distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antenna elements are miniaturized for mobile devices, then device size is reduced, but antenna gain deteriorates due to decreased distance between antennas
Solution Approach 1:
A shielding structure comprising a concave portion and a dielectric material is introduced between adjacent antenna structures. The dielectric material with specific permittivity (2.2-3.5) acts as an intermediary to control electromagnetic field distribution, while the concave portion provides physical separation. This intermediary shielding structure reduces mutual interference between miniaturized antennas, maintaining antenna gain despite reduced element size and spacing.
Solution Approach 2:
The shielding structure is localized between specific adjacent antenna structures rather than applying uniform shielding throughout. The concave portion is positioned to create targeted electromagnetic isolation where needed, with the dielectric material filling the concave region to provide localized impedance control. This local quality approach effectively manages interference in critical areas while preserving overall antenna performance.
2Length of moving object
If distance between antennas is reduced for miniaturization, then device compactness is improved, but electromagnetic interference shielding deteriorates
Solution Approach 1:
The shielding structure with dielectric material serves as an intermediary element between closely spaced antennas. The dielectric material's specific permittivity range (2.2-3.5) enables it to mediate electromagnetic field interactions, creating a controlled impedance environment that reduces coupling between adjacent antennas while allowing the antennas to remain in close proximity for compact device design.
Solution Approach 2:
The dielectric material's permittivity parameter is specifically controlled within the range of 2.2-3.5 to optimize electromagnetic interference shielding. By adjusting this material parameter, the shielding effectiveness is enhanced while maintaining the reduced physical distance between antennas, enabling compact design without sacrificing interference protection.
3Area of stationary object
If antenna structures are arrayed closely on plate body, then space utilization is improved, but signal interference increases
Solution Approach 1:
The shielding structure segments the electromagnetic space between adjacent antenna structures. The concave portion divided by dielectric material creates distinct electromagnetic zones, isolating signal paths between closely arrayed antennas. This segmentation allows multiple antennas to be densely arrayed on the plate body while maintaining signal integrity by preventing interference through the segmented shielding barriers.
Solution Approach 2:
The dielectric material within the concave shielding structure acts as an intermediary that manages signal interactions between densely packed antennas. It provides controlled impedance matching and reduces signal coupling, enabling effective space utilization on the plate body without generating harmful signal interference between adjacent antenna elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves antenna isolation and gain, maintaining effective antenna performance even after size reduction, while increasing the efficiency and reliability of antenna operation.
Implementation Method 1
the concave portion and the dielectric material serve as a shielding structure... form a discontinuous impedance distribution
Data Source
AI summary
An antenna module is provided with a plurality of antenna structures and a shielding structure arranged on a plate body, and the shielding structure is located between two adjacent antenna structures, where the shielding structure includes a concave portion formed on the plate body and a dielectric material formed between the concave portion and the antenna structure to generate different impedance characteristics, thereby improving the antenna isolation.