Leaky-Wave Aperture Reconfiguration for Beam Steering Without Nulls
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Solution Overview
Problem
Existing wearable devices for activity tracking and health monitoring face challenges due to increased cost, size, and complexity from electrical components like batteries and antennas, necessitating frequent charging.
Innovation Solution
Incorporation of a leaky wave antenna-based transceiver with beam-scanning capability into wearable devices, utilizing substrate integrated waveguide technology to facilitate compact design and selective signal radiation directions, mitigating null regions and enabling seamless interaction with computing devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional wearable devices use traditional electrical components (battery, antennas, sensors), then communication functionality is achieved, but device size, complexity, and cost increase
Solution Approach 1:
The patent combines the antenna and waveguide structures into an integrated leaky-wave antenna system, merging multiple electrical components into a single unified structure that provides both radiation and signal guiding functions, thereby reducing overall device complexity while maintaining communication functionality
Solution Approach 2:
The leaky-wave antenna structure serves multiple functions simultaneously: it acts as both the radiating element and the waveguide, providing signal transmission, beam scanning, and radiation patterns control without requiring separate dedicated components for each function
2Volume of moving object
If traditional antennas are used in wearable devices, then signal transmission is achieved, but device size increases
Solution Approach 1:
The patent implements dynamic beam scanning capability through the leaky-wave antenna by varying the propagation constant along the waveguide structure, allowing the radiation beam to scan across different angles without physically moving the antenna, thus maintaining compact size while achieving directional signal transmission
Solution Approach 2:
The leaky-wave antenna utilizes the longitudinal dimension of the waveguide structure to achieve beam scanning in the angular domain, transforming the problem from spatial movement to phase gradient control along the length of the antenna, thereby maintaining a compact form factor
3Ease of operation
If beam scanning capability is added to transceiver, then signal direction control is improved, but device complexity increases
Solution Approach 1:
The patent achieves beam scanning by changing the propagation constant parameter along the waveguide structure, which directly controls the beam angle without requiring complex mechanical or electronic steering mechanisms, thereby simplifying the overall device architecture
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 solution reduces device size and complexity while enhancing battery life by optimizing signal transmission and reception, allowing for efficient interaction with digital environments.
Implementation Method 1
a planar transmitter that includes a leaky wave antenna structure configured for beam scanning
Data Source
AI summary
The technology described herein is directed towards a transceiver with beam scanning capability based on leaky wave antenna technology and substrate integrated waveguide technology, along with a metallic covering that determines which direction the antenna radiates signals. The leaky wave antenna can include different respective groups of slot pairs having different respective periodicities, corresponding to different respective beam steering directions. One or more metallic covers can be used to cover some of the slot pair sections, such that the sections under cover behave like a conventional substrate integrated waveguide and the exposed section(s) behave like conventional leaky wave antennas. The metallic covers can be moved as desired, such as attached via magnets. The transceiver can thus steer signals to a wearable or portable device that includes a passive metasurface while mitigating null regions. The slot pairs can be asymmetrical reflection-canceling slot pairs, to achieve broadside radiation while avoiding band-stop effects.