Orthogonal Antenna Element Body Surface Diffraction
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Solution Overview
Problem
Existing antennas used in close proximity to the human body face significant signal loss due to electromagnetic radiation absorption by the body, which can be mitigated by increasing power consumption, but this is not viable for small devices with limited power sources.
Innovation Solution
An antenna device with a conducting element that extends between 1/16 and a full wavelength orthogonally to the user's body surface, emitting an electromagnetic field with an electric field polarized orthogonal to the body surface, minimizing propagation losses by diffraction along the body surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power of transmitted signals is increased to overcome signal loss, then the communication reliability is improved, but the power consumption increases which is not viable for small devices with limited power sources
Solution Approach 1:
The patent changes the orientation parameter of the antenna element from parallel to orthogonal relative to the body surface. This parameter change fundamentally alters the electromagnetic field interaction with the body, enabling signals to diffract along the body surface rather than being absorbed, thereby improving communication reliability without increasing power consumption
Solution Approach 2:
The patent converts the harmful effect of body absorption into a beneficial diffraction effect. By orienting the antenna orthogonally, the electromagnetic waves that would normally be absorbed by the body are instead caused to diffract along the body surface, transforming the body from a signal obstacle into a signal guide
2Volume of moving object
If conventional antennas are used in close proximity to the body, then the device size is reduced, but significant signal loss occurs due to electromagnetic radiation absorption by the body
Solution Approach 1:
The patent changes the orientation parameter of the antenna element from parallel to orthogonal relative to the body surface. This parameter change fundamentally alters the electromagnetic field interaction with the body, enabling signals to diffract along the body surface rather than being absorbed, thereby improving communication reliability without increasing power consumption
Solution Approach 2:
The patent utilizes a different spatial dimension for signal propagation. Instead of attempting to propagate signals through or away from the body in conventional directions, the orthogonal antenna orientation enables signals to propagate along the surface dimension of the body, opening a new propagation pathway that avoids traditional absorption losses
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 configuration enhances the reception and transmission of electromagnetic radiation with reduced interaction with the body surface, providing robust and low-loss wireless communication for devices like body area networks and hearing aids.
Implementation Method 1
the electromagnetic field may propagate primarily in a direction along a surface of the user body
Implementation Method 2
an electromagnetic field emitted by the antenna structure during operation may have an electric field polarized substantially orthogonal to the surface of the user body
Data Source
AI summary
An antenna device configured to be used at or in proximity to a user, the antenna device includes: an antenna structure having a conducting element, the conducting element extending over a length of between 1/16 of a wavelength and a full wavelength in a direction substantially orthogonal to a surface of the user, when the antenna device is provided in an intended operational position. A device includes: a housing having an operational position with respect to a user of the device; and an antenna structure coupled to the housing and having a conducting element, wherein the antenna structure is configured to emit an electromagnetic field so that the electromagnetic field propagates in a direction having a major directional vector that corresponds with a surface of a user using the device when the housing is at the operative position.