Distributed Monopole Antenna Layout for Cross-Body Wearable Links
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Solution Overview
Problem
Existing wearable electronic devices face challenges in implementing monopole antennas due to their required minimum height, which exceeds the constrained form factors, and vertical electrical field antennas suffer from orientation dependencies and strong body effects that degrade performance.
Innovation Solution
The development of distributed monopole antennas with multiple conductive plates and vias, arranged in patterns such as 1×N or square shapes, which are significantly shorter in height while maintaining efficient creeping wave excitation and robust cross-body links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional monopole antenna is used, then the antenna can excite creeping waves effectively, but the antenna height exceeds the constrained form factor of wearable devices
Solution Approach 1:
The monopole antenna is segmented into multiple conductive plates (first conductive plate, second conductive plate, third conductive plate) arranged vertically with vias connecting them. This segmentation allows the antenna to achieve the required electrical length for effective creeping wave excitation while maintaining a compact physical height suitable for wearable devices.
2Device complexity
If vertical electrical field antennas are used, then the antenna structure is simple, but the antenna suffers from orientation dependencies and strong body effects that degrade performance
Solution Approach 1:
The antenna employs different conductive plates with specific configurations (first conductive plate with first pattern, second conductive plate with second pattern, third conductive plate) to create localized electromagnetic field distributions that reduce orientation dependency and mitigate strong body effects, improving cross-body link reliability while maintaining structural simplicity.
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 distributed monopole antennas provide improved cross-body communication with reduced directivity, increased bandwidth, and flexibility, overcoming body effects and fitting into compact devices without compromising performance.
Implementation Method 1
These signals are often referred to as creeping waves
Data Source
AI summary
The disclosed distributed monopole antenna may include a first conductive plate and a second conductive plate. The distributed monopole antenna may also include multiple different vias that electrically connect the first conductive plate to the second conductive plate. Still further, the distributed monopole antenna may include an antenna feed electrically connected to at least one of the vias. Various other systems, methods of manufacturing, and wearable electronic devices that implement distributed monopole antennas are also disclosed.