Ring-Shaped Antenna Mode Switching for Wearable Beam Direction
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Solution Overview
Problem
The relative position change between an antenna and a signal transceiver apparatus in wearable electronic devices affects communication quality and positioning precision due to limb movement, degrading user experience.
Innovation Solution
An antenna structure with a ring-shaped radiator, ground plate, and switch assembly that allows for mode switching between CM and DM modes, adjusting beam direction based on arm position, enhancing signal strength and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional antenna is used in wearable electronic devices, then the device can achieve basic communication function, but the communication quality and positioning precision deteriorate due to relative position change between antenna and signal transceiver apparatus during limb movement
Solution Approach 1:
The patent implements dynamic beam direction control by switching between CM mode and DM mode based on arm position. The antenna structure uses a switch assembly to dynamically change the operating mode, thereby adapting the beam direction to maintain optimal communication quality during limb movement. This resolves the contradiction by making the antenna system dynamic rather than static.
Solution Approach 2:
The patent changes the operational parameters of the antenna by switching between two distinct modes: CM mode (with specific ground end connections) and DM mode (with different ground end connections). This parameter switching allows the antenna to adjust its radiation pattern and beam direction, improving communication reliability while adapting to movement-induced position changes.
2Measurement precision
If the antenna operates in fixed mode, then the structure is simple, but the positioning precision and communication quality deteriorate due to inability to adjust beam direction
Solution Approach 1:
The patent segments the antenna operation into distinct modes (CM mode and DM mode) with specific ground end connection configurations. By dividing the operational space into discrete modes that can be switched between, the patent achieves precise beam direction control without requiring a completely complex continuous adjustment mechanism, thus improving positioning precision while managing structural complexity.
Solution Approach 2:
The antenna structure is designed to perform multiple functions through mode switching: it can operate in CM mode for optimal positioning precision and in DM mode for alternative communication scenarios. This multi-functionality allows a single antenna structure to handle different operational requirements, improving measurement precision without proportionally increasing device complexity.
3Reliability
If the antenna beam direction is fixed, then the manufacturing is simple, but the communication quality deteriorates when arm orientation changes during user movement
Solution Approach 1:
The patent introduces dynamic adaptability to the antenna system through mode switching between CM and DM modes. This allows the beam direction to be adjusted based on arm orientation during user movement, maintaining strong signal strength and communication reliability without requiring complex continuous mechanical adjustment mechanisms, thus balancing ease of manufacture with improved reliability.
4Illumination intensity
If multiple ground ends are connected to ground plate simultaneously, then the antenna can operate in CM mode with better directivity, but the adaptability to different arm positions is reduced
Solution Approach 1:
The patent uses the switch assembly to dynamically control the connection state of different ground ends to the ground plate. In CM mode, specific ground ends are connected to achieve better directivity; in DM mode, different ground ends are connected for adaptability to different arm positions. This dynamic switching resolves the contradiction by allowing the system to optimize for directivity or adaptability based on operational requirements.
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
Improves satellite communication and positioning accuracy by ensuring the beam direction of the electromagnetic wave consistently faces the sky regardless of arm orientation, maintaining strong signal strength.
Implementation Method 1
the ring-shaped radiator can easily operate in a symmetry mode (CM mode). In the CM mode, directivity of an electromagnetic wave radiated by the ring-shaped radiator in a 6 o'clock direction is better, and a signal is stronger
Implementation Method 2
the switch assembly is coupled between the ring-shaped radiator and the ground plate... When the switch assembly is turned on, the second ground end or the third ground end coupled to the switch assembly may be coupled to the ground plate
Data Source
AI summary
An antenna structure and an electronic device is provided. In the antenna structure, when a switch assembly is in a second state, at a target frequency, at least one of a second ground end and a third ground end may be electrically isolated from a ground plate, and a feeding end and a first ground end may excite a ring-shaped radiator to operate mainly in an antisymmetry mode. When the switch assembly is in a first state, the first ground end and at least one of the second ground end and the third ground end are electrically connected to the ground plate, and at least one of the second ground end and the third ground end, the feeding end, and the first ground end may excite the ring-shaped radiator to operate mainly in a symmetry mode.