Display Antenna Mesh Layout With Integrated Impedance Matching
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Solution Overview
Problem
Existing antennas in display devices face challenges in achieving sufficient radiation and gain properties due to reduced space and interference with display device structures, leading to degraded image quality and deteriorated radiation properties.
Innovation Solution
An antenna device with a dielectric layer having high and low transmittance areas, featuring a radiator with a mesh structure, a signal pad with a solid pattern, and an impedance matching pattern with a solid structure connecting the two, which omits additional transmission lines to improve radiation and signaling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the antenna dimension is decreased to make the display device thinner and light-weighted, then the space for the antenna is reduced, but sufficient radiation and gain properties cannot be achieved
Solution Approach 1:
The patent employs thin film structures for the antenna components, including a thin radiator layer and thin dielectric layers, enabling the antenna to function effectively in a reduced thickness while maintaining radiation properties through optimized film geometry and material selection
Solution Approach 2:
The patent transitions from planar antenna structures to three-dimensional configurations by stacking multiple thin film layers with specific patterns, creating vertical dimensionality that enhances radiation capability within a constrained horizontal space
2Adaptability or versatility
If electrode structures are included in the antenna to provide communication function, then the antenna can be integrated with the display device, but image quality is degraded
Solution Approach 1:
The patent applies different structural qualities to different regions: the radiator uses a mesh pattern in the active display area to minimize visual impact, while the impedance matching pattern and signal pad use solid structures in non-display peripheral areas where they do not interfere with image quality
Solution Approach 2:
The antenna is segmented into distinct functional regions (radiator, impedance matching pattern, signal pad, ground pad) that are spatially separated, allowing the radiator to be optimized for visual compatibility while other components are positioned in areas that do not affect display quality
3Reliability
If additional transmission lines are added to connect the radiator and signal pad for impedance matching, then the antenna structure is more complete, but the antenna size increases and radiation efficiency decreases
Solution Approach 1:
The patent merges the impedance matching function with the signal pad structure itself, where the signal pad is designed with specific dimensions and positioning that inherently provide impedance matching, eliminating the need for separate transmission lines
Solution Approach 2:
The signal pad serves multiple functions simultaneously: it provides electrical connection to the radiator, provides impedance matching through its geometric design, and acts as a reference plane, consolidating multiple functions into a single structural element
Data Source
AI summary
An antenna device according to an embodiment includes a dielectric layer including a high transmittance area and a low transmittance area, and an antenna unit disposed on the dielectric layer. The antenna unit includes a radiator disposed on the high transmittance area of the dielectric layer and having a mesh structure, a signal pad disposed on the low transmittance area of the dielectric layer and having a solid pattern structure, and an impedance matching pattern connecting the radiator and the signal pad on the low transmittance area of the dielectric layer. The impedance matching pattern has a larger width than that of the signal pad and has a solid pattern structure.