Antenna Position Sensors for Retractable Wireless Devices
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Solution Overview
Problem
Designing antennas for electronic devices with conductive housings poses challenges due to shielding issues and the need for retractable antennas, which can lead to circuit damage or power losses when operated in retracted positions.
Innovation Solution
Incorporating sensors such as pressure, Hall effect, proximity, optical, or inductive sensors to determine the presence and position of extendable and removable antennas, allowing for controlled operation of radio-frequency transceivers based on antenna extension, thereby optimizing power usage and reducing damage risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a retractable antenna is used to improve appearance and reduce damage risk, then the visual appearance and durability are improved, but the antenna cannot operate when retracted causing circuit damage or power losses
Solution Approach 1:
The patent employs sensors (proximity, optical, mechanical) to detect antenna position and provides feedback to the control circuit. The control circuit uses this feedback to determine whether the antenna is extended or retracted, and accordingly controls the transceiver operation to prevent circuit damage and power losses while maintaining the aesthetic benefits of a retractable antenna design
2Stability of the object's composition
If an internal antenna is used in a conductive housing, then the housing integrity is maintained, but the antenna is shielded reducing transmission and reception efficiency
Solution Approach 1:
The patent introduces sensors as intermediary components between the internal antenna and the conductive housing. These sensors detect the antenna's extended or retracted position, enabling the control circuit to mediate transceiver operation based on antenna state, thereby maintaining housing integrity while optimizing transmission efficiency through controlled operation
3Duration of action of moving object
If the transceiver operates when the antenna is retracted, then continuous communication capability is maintained, but circuit damage or power losses occur
Solution Approach 1:
The patent makes the transceiver operation dynamic by continuously monitoring antenna position through sensors. The control circuit dynamically adjusts transceiver operation based on real-time antenna state detection, enabling communication when extended while preventing circuit damage when retracted, thus balancing communication availability with circuit safety
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
Enables efficient wireless communication by ensuring antennas are properly extended for optimal performance while minimizing power consumption and preventing damage, improving both functionality and durability.
Implementation Method 1
The electronic device may have one or more Hall effect sensors that detect the presence or proximity of a magnetic portion of the antenna
Data Source
AI summary
Electronic devices may be provided with sensors for determining the presence and position of extendable and removable antennas. The antennas may extend by rotating about an axis, by reciprocating along their length, or by flexing from a retracted position to an extended position. The electronic device may determine when a removable antenna is attached or detached using signals from the sensors. The electronic device may determine the extent to which an antenna has been extended using signals from the sensors. The electronic device may control the operation of a radio-frequency transceiver that is coupled to the antenna based on signals from the sensors. The electronic device may turn the transceiver off when the antenna is retracted or removed. When the antenna is partially extended, the electronic device may place the transceiver in a low-power mode or place a dual-band transceiver into a single-band mode.