Laminated Antenna Structure for Multi-Frequency MIMO Systems
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Solution Overview
Problem
Current handheld communication devices face challenges in integrating a 4G/B4G LTE MIMO multi-frequency multi-antenna system and future 5G communication systems due to limited antenna layout area, leading to difficulties in achieving sufficient data transmission speed and bandwidth.
Innovation Solution
A laminated antenna structure is developed, comprising a substrate, a first conductive circuit layer, an insulating colloidal layer, and a second conductive circuit layer, forming either a capacitive or inductive structure. The insulating colloidal layer includes a resin, organic solvent, and catalyzers such as organometallic particles or ionic compounds, which reduces the parasitic coupling effect, minimizing the antenna size and increasing impedance bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional planar antenna layout is used in handheld devices, then antenna design is simple, but antenna layout area is insufficient for multi-frequency multi-antenna systems
Solution Approach 1:
The patent transitions from traditional planar (2D) antenna layout to a three-dimensional laminated structure. Multiple conductive circuit layers are stacked vertically with insulating colloidal layers between them, creating a 3D antenna system that充分利用 the z-direction space. This dimensional transition enables sufficient antenna layout area for multi-frequency multi-antenna systems while maintaining a compact handheld device form factor.
Solution Approach 2:
The patent implements a nested laminated structure where multiple conductive circuit layers are embedded within insulating colloidal layers in a stacked configuration. Each conductive layer is nested within the insulating matrix, forming a compact multi-layer antenna system that maximizes space utilization and provides sufficient layout area for multiple antenna elements.
2Area of stationary object
If antenna size is reduced to fit handheld devices, then device compactness is improved, but impedance bandwidth decreases
Solution Approach 1:
The patent compensates for reduced antenna footprint area by extending the antenna structure into the third dimension through multiple stacked conductive layers. The vertical stacking provides additional effective radiating area and enables impedance bandwidth enhancement through inter-layer coupling, allowing compact antenna size while maintaining adequate impedance bandwidth for modern communication standards.
Solution Approach 2:
The patent employs composite insulating colloidal layers with specific dielectric properties (er=3.5-5.0, tanδ=0.005-0.020) to optimize the electromagnetic performance of the compact laminated antenna. The composite material composition, including resin, organic solvent, and catalyzers, enables precise control of dielectric characteristics to enhance impedance bandwidth while maintaining compact dimensions.
3Speed
If multi-frequency multi-antenna system is integrated, then data transmission speed is improved, but antenna layout area requirement increases
Solution Approach 1:
The patent enables integration of multi-frequency multi-antenna systems by utilizing vertical stacking of multiple conductive circuit layers. This 3D configuration provides sufficient layout area for multiple antenna elements supporting MIMO and multi-frequency operations without increasing the planar footprint, thereby enabling high data transmission speeds within compact handheld device constraints.
4Object-generated harmful factors
If insulating colloidal layer with catalyzers is used, then parasitic coupling effect is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent employs composite insulating colloidal layers containing resin, organic solvent, and catalyzers (0.1-10 wt%) to reduce parasitic coupling effects between adjacent conductive layers. The specific composition with controlled dielectric properties minimizes unwanted electromagnetic interactions while the colloidal formulation enables practical manufacturing through conventional lamination processes.
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
The laminated antenna structure effectively reduces the quality factor of the antenna, increases impedance bandwidth, and enhances radiation efficiency by minimizing the layout area and adjusting capacitance values, thereby improving data transmission speed and operating bandwidth.
Implementation Method 1
The insulating colloidal layer reduces the parasitic coupling effect, minimizing the antenna size and increasing impedance bandwidth
Data Source
AI summary
A laminated antenna structure includes a substrate, a first conductive circuit layer, an insulating colloidal layer, a second conductive circuit layer and a conductive structure. The first conductive circuit layer is disposed on or above the substrate, the second conductive circuit layer is disposed above the first conductive circuit layer, and the insulating colloidal layer is disposed between the first and the second conductive circuit layers. The first conductive circuit layer, the insulating colloidal layer and the second conductive circuit layer form a laminated capacitive structure. The conductive structure is electrically connected to a signal source on the substrate, and the signal source is electrically connected to at least one of the first conductive circuit layer and the second conductive circuit layer. The insulating colloidal layer contains catalyzers.