Branched Parasitic Antenna Array for Multi-Band Display Connectivity
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Solution Overview
Problem
Existing antenna structures in image display devices face challenges in achieving high-frequency communication with efficient radiation and gain, as increased frequency leads to signal loss and reduced radiation coverage, and designing multi-polarization and broadband antennas in limited spaces is difficult.
Innovation Solution
An antenna structure with a dielectric layer, a radiator having convex and concave portions, and parasitic elements with branched portions is used, providing dual polarization and multi-band coverage by adjusting the distance and width of the branched portions relative to the radiator, enhancing gain across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the antenna operates at high frequency, then communication capability is improved, but signal loss increases and radiation efficiency decreases
Solution Approach 1:
The antenna is divided into multiple antenna units arranged in an array, each unit contributing to the overall radiation. This segmentation allows the high-frequency signal to be distributed across multiple radiating elements, reducing signal loss in individual elements while maintaining high-frequency operation capability.
Solution Approach 2:
Multiple antenna units are combined into a single antenna array structure with shared parasitic elements. The merging of multiple radiating elements creates constructive interference patterns that enhance radiation efficiency at high frequencies while compensating for individual element losses.
2Area of stationary object
If the radiation coverage is expanded, then antenna coverage is improved, but radiation density and antenna gain are reduced
Solution Approach 1:
The parasitic elements are strategically positioned in specific locations around the antenna units, creating localized regions of enhanced electromagnetic field interaction. This local quality enhancement maintains high radiation density in key directions while providing broad overall coverage through the array configuration.
Solution Approach 2:
The antenna structure transitions from planar to three-dimensional by positioning parasitic elements at different spatial locations around the antenna units. This dimensional expansion enables simultaneous achievement of wide coverage and high gain through spatial diversity and constructive interference in multiple directions.
3Adaptability or versatility
If multi-polarization and broadband properties are designed, then communication versatility is improved, but device complexity increases
Solution Approach 1:
The parasitic elements serve multiple functions simultaneously: they enable multi-polarization radiation patterns, extend broadband operation, and provide impedance matching. This multi-functionality achieves versatile communication capability without proportionally increasing structural complexity, as single elements perform multiple roles.
Solution Approach 2:
The antenna array is designed with symmetric configuration and uniform spacing between elements, creating equipotential conditions that simplify the achievement of multi-polarization patterns. The balanced structure allows straightforward implementation of diverse radiation patterns without complex feeding networks or additional components.
4Length of stationary object
If the transmission path length increases, then coverage area is improved, but antenna gain decreases
Solution Approach 1:
The parasitic elements are pre-positioned around the antenna units before signal transmission, creating predetermined electromagnetic coupling paths. This preliminary configuration establishes optimal radiation patterns and impedance matching in advance, maintaining high gain even as the effective transmission path extends across the array to achieve broader coverage.
Data Source
AI summary
An antenna structure according to an embodiment of the present disclosure includes an antenna unit array including a plurality of antenna units, and a parasitic element disposed to be adjacent to the antenna units and to be electrically and physically separated from the antenna units. Each of the antenna units includes a radiator, and a transmission line including a first transmission line and a second transmission line connected to the radiator in different directions. The parasitic element includes a first parasitic element disposed between the first transmission line and the second transmission line included in the same antenna unit, and a second parasitic element disposed between the first transmission line and the second transmission line included in different neighboring antenna units. The second parasitic element includes a branched portion including a first branched portion and a second branched portion bent in different directions.