Shared Grounding Structure for Compact Wireless Antennas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern wireless communication devices face challenges in designing antennas that can support multiple frequency bands with sufficient bandwidth and radiation efficiency while maintaining compact physical dimensions, due to limited internal space and the need for multiple-input multiple-output (MIMO) capabilities.
Innovation Solution
The design incorporates dual or multiple antennas with a shared grounding structure, where each monopole element is capacitively coupled to a common grounding structure, increasing the effective size of the antennas and improving radiation performance across a wide bandwidth, while minimizing space consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are provided to support multiple frequency bands and MIMO, then bandwidth and radiation performance are improved, but the physical dimensions and space consumption increase
Solution Approach 1:
Multiple antenna elements share a common grounding structure instead of each having separate ground planes. This merging of the grounding system allows multiple antennas to coexist in a compact space while maintaining their individual radiation characteristics and bandwidth performance across multiple frequency bands
Solution Approach 2:
The common grounding structure serves multiple antenna elements simultaneously, making it a multi-functional component that supports various frequency bands and MIMO operations without requiring separate dedicated ground structures for each antenna
2Volume of moving object
If antenna size is reduced to fit limited internal space, then space consumption is reduced, but bandwidth and radiation efficiency deteriorate
Solution Approach 1:
The antenna elements are arranged in a three-dimensional configuration within the device housing, utilizing vertical and lateral spacing to achieve adequate radiation performance and bandwidth without increasing the overall footprint area of the device
3Volume of moving object
If antenna size is reduced to fit limited internal space, then space consumption is reduced, but radiation efficiency deteriorates
Solution Approach 1:
The common grounding structure acts as an intermediary that couples multiple antenna elements together, enabling them to share electromagnetic energy and improve overall radiation efficiency even when individual elements are electrically small due to compact physical dimensions
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
This approach enhances radiation efficiency and bandwidth performance of antennas in wireless devices, allowing them to support multiple frequency bands within smaller physical dimensions, effectively addressing the space constraints and performance requirements.
Implementation Method 1
each monopole element is capacitively coupled to a common grounding structure
Data Source
AI summary
Techniques for providing multiple antennas in a wireless device using a compact configuration to achieve good isolation and broad bandwidth. In an aspect, first and second monopole elements that may be separately driven are provided on opposite sides of a grounding strip conductively coupled to a common grounding structure. By capacitively coupling the first and second monopole elements to the common grounding structure, the effective resonator size of each monopole antenna is increased, thus achieving better performance for the antenna structure. Illustrative patterns for the common grounding structure and other antenna elements are further disclosed.