MIMO Antenna With Meander Structure and Decoupling
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Solution Overview
Problem
Conventional monopole antennas printed on dielectric substrates are sensitive to ground changes and have fixed sizes, making them difficult to miniaturize for use in small devices while maintaining performance.
Innovation Solution
A multi-input multi-output (MIMO) antenna with a meander form structure connected to a ground plate using medium power feeding units, incorporating a decoupling structure and infinite wavelength metamaterial characteristics to suppress phase changes and mutual interference, resulting in a miniaturized design with improved gain and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a monopole antenna is printed on a dielectric substrate with a selective ground, then resonance occurs over a broad band with impedance change, but the antenna size is fixed and difficult to reduce for small devices
Solution Approach 1:
The patent transitions from a planar printed antenna to a three-dimensional structure by introducing vertical elements and stacked configurations. The antenna system employs multiple layers and vertical positioning of radiating elements, transforming the design from two-dimensional to three-dimensional space, thereby achieving size reduction while maintaining performance stability
Solution Approach 2:
The patent implements a nested structure where multiple antenna elements are stacked vertically and integrated within a compact volume. The inner and outer conductors are arranged in concentric or nested configurations, allowing multiple functional elements to occupy overlapping spatial regions, thus minimizing overall antenna size while preserving electrical performance
2Volume of moving object
If the antenna size is reduced for small devices, then the antenna can be applied to compact terminals, but the ground configuration becomes constrained and performance sensitivity increases
Solution Approach 1:
The patent introduces a dielectric substrate as an intermediary layer between the antenna elements and the ground plane. This intermediate dielectric layer decouples the antenna elements from direct interaction with ground variations, reducing performance sensitivity to ground configuration changes while enabling compact antenna sizing
Solution Approach 2:
The patent employs composite structures combining conductive elements with dielectric materials in a layered configuration. The combination of conductive radiating elements and dielectric substrates creates a composite antenna system that is less sensitive to ground variations and achieves miniaturization through optimized material properties and structural integration
3Reliability
If a decoupling structure is added to suppress mutual interference, then gain and efficiency are improved, but device complexity increases
Solution Approach 1:
The patent combines the decoupling function with the existing antenna structure by integrating isolation elements into the overall antenna assembly. The decoupling structures are merged with the radiating elements and feeding networks, achieving mutual interference suppression without requiring entirely separate additional components, thus limiting complexity increase
Data Source
AI summary
A multi input multi output (MIMO) antenna with no phase change is provided. The MIMO antenna having no phase change constituting one antenna structure overall, wherein unit structures at both sides are symmetrical to each other in a meander form with respect to the center; the unit structures having the meander form are connected to a ground plate by using as a medium power feeding units 240 and 250 supplying an electric energy to the respective unit structures; and the unit structures are installed with a three-dimensional structure, being adjacent to the ground plate.