Antenna Apparatus with Parallel Ground Planes for Reduced Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antenna apparatuses face challenges in downsizing while maintaining performance, as increased antenna coupling leads to decreased efficiency and higher correlation coefficients when multiple antennas are used on a single ground plane.
Innovation Solution
The use of two ground planes provided substantially in parallel to each other allows for downsizing while preventing performance degradation by breaking symmetry in current distributions and radiation patterns, thereby improving antenna efficiency and reducing correlation coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple antennas are disposed on one ground plane, then the antenna apparatus can be downsized, but antenna coupling increases leading to decreased efficiency and higher correlation coefficients
Solution Approach 1:
The single ground plane is segmented into multiple ground planes (first ground plane and second ground plane), allowing antennas to be distributed across separate planes. This segmentation reduces mutual coupling between antennas while maintaining a compact overall structure, thus improving antenna efficiency without significantly increasing the apparatus volume.
Solution Approach 2:
The invention transitions from a two-dimensional arrangement of antennas on a single ground plane to a three-dimensional configuration using multiple ground planes stacked in the vertical dimension. This dimensional change allows antennas to be spaced apart in the vertical direction, reducing coupling effects while maintaining a small horizontal footprint.
2Volume of moving object
If multiple antennas are disposed on one ground plane, then the antenna apparatus can be downsized, but correlation coefficients increase leading to performance degradation
Solution Approach 1:
The ground plane system is segmented into multiple independent ground planes, each supporting specific antennas. This segmentation reduces correlation between antennas by providing electrically isolated reference planes, thereby improving MIMO performance while maintaining structural compactness.
3Reliability
If distance between ground planes is increased, then antenna efficiency improves and correlation coefficients decrease, but the overall apparatus size increases
Solution Approach 1:
The invention optimizes the distance parameter between ground planes to achieve a balance between reducing antenna coupling and maintaining compact size. By carefully selecting this critical dimension, the system achieves improved efficiency and reduced correlation coefficients without excessive increase in overall apparatus volume.
Data Source
AI summary
An antenna apparatus capable of being downsized while preventing performance degradation is provided. Antenna apparatus includes: first antenna; second antenna; first ground plane to which first antenna is connected via first power feeder; and second ground plane to which second antenna is connected via second power feeder. In antenna apparatus, first ground plane and second ground plane are provided substantially in parallel with each other.