3D Antenna Structure for High Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Two-dimensional antennas face limitations in certain wireless communication applications due to degradation from electric vector cancellation by ground planes, which affects their performance in concurrent multi-mode operations.
Innovation Solution
A three-dimensional antenna structure comprising a dipole antenna with suspended arms and multiple monopole antennas, where all elements are coplanar and positioned to short tangential electric fields, providing high isolation and mitigating the degradation issues of two-dimensional antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two-dimensional antennas are used, then the device complexity is reduced, but the isolation between antennas degrades due to electric vector cancellation by ground planes
Solution Approach 1:
The patent transitions from two-dimensional planar antennas to three-dimensional antennas with vertical elements extending above the ground plane. The dipole antenna comprises vertical arms and the monopole antenna includes a vertical radiating element with a ground stub, creating a three-dimensional structure that eliminates electric vector cancellation issues present in two-dimensional configurations while maintaining manageable device complexity.
2Reliability
If three-dimensional antenna structure is implemented, then the isolation between antennas is enhanced, but the device complexity increases
Solution Approach 1:
The three-dimensional antenna structure is segmented into distinct functional elements: the dipole antenna with its two vertical arms, the monopole antenna with its radiating element and ground stub, and the ground plane. Each segment serves a specific function in achieving isolation, and the segmented design allows for systematic implementation that manages overall device complexity while maintaining high isolation performance.
3Area of stationary object
If antenna elements are positioned closer to the ground plane, then the device footprint is reduced, but the electric vector cancellation effect increases
Solution Approach 1:
The patent resolves the footprint versus performance contradiction by introducing a vertical dimension. The antenna elements extend upward from the ground plane rather than spreading laterally, allowing the device to maintain a compact horizontal footprint while achieving adequate vertical separation to minimize electric vector cancellation effects and maintain antenna performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The three-dimensional antenna structure enhances isolation between antennas, allowing for concurrent multi-mode operations without degrading performance, effectively addressing the limitations of two-dimensional antennas in the presence of ground planes.
Implementation Method 1
the three-dimensional dipole antenna is configured to short tangential electric fields within the first plane
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In accordance with one example, an antenna structure includes a three-dimensional dipole antenna having a first arm and a second arm that are suspended above a ground plane. One or more three-dimensional monopole antennas have corresponding monopole elements positioned in a plane of symmetry between the arms of the dipole. Other examples are disclosed.