Dielectric-Loaded Eyewear Antenna for Compact Multi-Band Operation
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Solution Overview
Problem
Existing eyewear devices face challenges in integrating efficient multi-band antennas due to space constraints and the need for both fashion and functionality, leading to compromised antenna performance and increased energy consumption.
Innovation Solution
The implementation of an aperture tuned dielectric loaded multi-band dipole antenna, where one leg of the antenna is co-located with the battery casing and the other leg is dielectrically loaded with different permittivity materials to achieve multiple resonances, optimizing electrical length without increasing physical size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a traditional dipole antenna is used in eyewear devices, then the antenna can provide basic communication functionality, but the antenna size must be reduced to fit space constraints, which compromises radiation efficiency and increases energy consumption
Solution Approach 1:
The patent changes the electrical parameters of the antenna by introducing dielectric loading with different permittivity values (εr1 and εr2) in different sections of the antenna leg. This allows the antenna to achieve multiple resonant frequencies and maintain radiation efficiency in a compact form factor, resolving the contradiction between small size and energy efficiency
Solution Approach 2:
The patent uses composite dielectric materials with different permittivity values loaded in different sections of the antenna. This composite approach enables the antenna to achieve multi-band operation and improved radiation efficiency within the constrained volume of wearable eyewear devices
2Volume of moving object
If the antenna is made compact to fit wearable devices, then space constraints are satisfied, but the antenna cannot support multiple frequency bands effectively
Solution Approach 1:
The patent applies different dielectric loading characteristics to different local sections of the antenna leg. The first section has dielectric material with permittivity εr1 and the second section has dielectric material with permittivity εr2, where εr1 ≠ εr2. This local differentiation enables the compact antenna to support multiple frequency bands by creating different resonant conditions in different sections
Solution Approach 2:
The patent divides the antenna leg into multiple sections with different dielectric loadings. This segmentation allows each section to contribute to different resonant frequencies, enabling multi-band operation in a compact antenna structure that fits wearable devices
3Device complexity
If conventional antenna designs are used, then the design process is simple, but radiation efficiency is compromised in compact wearable form factors
Solution Approach 1:
The patent modifies the electrical parameters by introducing controlled dielectric loading with specific permittivity values in different antenna sections. This parameter change improves radiation efficiency in compact form factors while maintaining manageable design complexity through systematic application of electromagnetic theory
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 design enhances communication range, reduces energy consumption, and supports multiple frequency bands, providing improved data throughput and radiation efficiency in a compact form factor suitable for wearable devices.
Implementation Method 1
The second leg has a first portion and a second portion. The first portion and the second portion may have the same physical length. The first portion is dielectrically loaded with a high permittivity loaded material, and the second portion is dielectrically loaded with a low permittivity loaded material.
Implementation Method 2
an aperture tuned dielectric loaded multi-band dipole antenna... achieve multiple resonances, optimizing electrical length without increasing physical size
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
Eyewear including a dipole antenna having a first leg and a second leg, wherein the first leg includes at least a portion of a battery, such as a conductive case of the battery. An antenna feed is coupled to the dipole antenna between the second leg and the battery. The second leg may comprise a flexible printed circuit (FPC), and the second leg is an active leg. The second leg has a first portion and a second portion. The first portion and the second portion may have the same physical length. The first portion may be dielectrically loaded with a high permittivity loaded material, and the second portion may be dielectrically loaded with a low permittivity loaded material.