Antenna Device With Folded Ground Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing planar antenna devices face challenges in miniaturization while maintaining essential antenna capabilities, as the miniaturization of the ground portion is difficult alongside the antenna part.
Innovation Solution
The antenna device incorporates a substrate with a first ground on the front side and a larger second ground on the back side, connected through vias or conductors, allowing for a reduced overall size while maintaining antenna performance by increasing the ground area effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the ground portion is miniaturized along with the antenna part, then the overall size is reduced, but the antenna capability deteriorates
Solution Approach 1:
The patent transitions the ground structure from a two-dimensional planar configuration to a three-dimensional folded configuration. The ground is folded along a fold line to form a first ground portion and a second ground portion that extend in different spatial directions, effectively increasing the ground area within a compact footprint while maintaining antenna performance
Solution Approach 2:
The folded ground structure nests multiple ground portions within a compact space. The first and second ground portions are positioned to surround the antenna element in three dimensions, creating a nested spatial arrangement that maximizes ground area while minimizing overall device volume
2Reliability
If a larger ground area is used to maintain antenna capability, then the antenna performance is improved, but the overall size increases
Solution Approach 1:
The ground structure utilizes three-dimensional folding to achieve a large effective ground area within a compact planar footprint. By folding the ground along a fold line, the patent creates multiple ground portions that extend in different directions, providing adequate ground area for antenna operation without increasing the overall device size
Solution Approach 2:
The patent employs a composite structure combining the folded ground configuration with a substrate having a specific relative dielectric constant (3.5 or less). This composite approach allows for size reduction while maintaining or enhancing antenna capability through the synergistic effect of the folded ground and low-dielectric substrate
Data Source
AI summary
Antenna device includes substrate, antenna formed on front side of substrate, first ground formed on front side of substrate, and second ground formed on back side of the substrate. Second ground is larger in area than antenna and larger in area than first ground. First ground is insulated from antenna and is connected with second ground through an end of substrate. Consequently, overall antenna device can come down in size while maintaining a capability of antenna.