Wireless Antenna Magnetic Switching for Hand Coverage Interference
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Solution Overview
Problem
Wireless communication devices experience reduced radiation efficiency due to antennas being covered by users' hands, leading to degraded communication functions.
Innovation Solution
Incorporation of light sensors and magnetic inductors that control the magnetic polarity of antennas, allowing the magnetic member to switch between antennas to maintain signal transmission efficiency when one antenna is obstructed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If multiple antennas are located at different positions inside the device to prevent mutual interference, then antenna interference is reduced, but antenna radiation efficiency deteriorates when antennas are covered by users' hands
Solution Approach 1:
The patent applies the dynamics principle by making the magnetic member movable between different antenna positions. The magnetic member can dynamically switch its attachment location based on which antenna is currently active and whether it is covered by the user's hand. This dynamic repositioning ensures that the active antenna maintains optimal radiation efficiency while the inactive antenna is protected from interference, resolving the contradiction between preventing mutual interference and maintaining radiation efficiency.
Solution Approach 2:
The magnetic member serves as an intermediary element that mediates between multiple antennas. By attaching to different antennas at different times, it acts as a switching mechanism that enables one antenna to function while shielding or deactivating others. This intermediary approach allows the system to prevent antenna interference without permanently fixing antennas in positions that would compromise their radiation efficiency when covered.
2Reliability
If a magnetic member is used to control antenna switching, then signal transmission efficiency is maintained, but device complexity increases
Solution Approach 1:
The magnetic member operates based on magnetic attraction and repulsion forces generated by the antennas themselves. When an antenna is activated, it creates a magnetic field that automatically attracts the magnetic member to its position. When the antenna is deactivated or covered, the magnetic field changes, causing the magnetic member to move to another antenna. This self-service mechanism eliminates the need for complex external control systems, motors, or sensors, maintaining signal transmission efficiency while minimizing device complexity.
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
Ensures continuous and efficient wireless signal transmission by dynamically switching the magnetic member's attachment between antennas, preventing interference and maintaining communication quality.
Implementation Method 1
a magnetic member (60) which is movable between a bonding portion (224) of the first antenna (22) and a bonding section (244) of the second antenna (24)
Data Source
AI summary
A wireless communication device includes a first antenna, a second antenna, a first light sensor adjacent to the first antenna, a second light sensor adjacent to the second antenna, a controller, and a magnetic member movably located between the first antenna and the second antenna. When one of the first and second antennas in a state of receiving/transmitting wireless signals is covered by a user's hand, the nearby light sensor sends a pulse signal to the controller. The controller receiving the pulse signal controls the first and second antennas to change their magnetic polarity, enabling the magnetic member to be separated from one of the first and second antennas and attached to the another one, thereby choosing one of the first and second antennas, or a combination of one of the two antennas and the magnetic member to receive/transmit the wireless signals.