Wireless Device Antenna Signal Path Switching
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Solution Overview
Problem
The radiation performance of wireless devices is degraded due to the user's hand interference, especially when internal antennas are positioned at the lower part of the device, which affects communication quality.
Innovation Solution
A signal path configuration method and apparatus that switches between multiple antennas based on usage environments and operation modes, allowing for RF calibration and communication mode adjustments to optimize antenna performance, using a switch to connect the signal path to either the upper or lower antennas depending on the mode, thereby avoiding hand-induced radiation loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is installed at the lower part of the wireless device, then the antenna installation space is secured, but the radiation characteristics are degraded due to user's hand interference
Solution Approach 1:
The patent implements dynamic switching between different antenna signal paths based on the detected operation mode. The control unit determines whether the device is in communication mode or RF calibration mode and dynamically connects the appropriate antenna (first or second antenna) to the RF unit, allowing the system to adapt to different usage conditions and avoid hand interference during communication
2Reliability
If multiple antennas are used for different modes, then the radiation performance is improved, but the device complexity increases
Solution Approach 1:
The patent employs a single RF unit that can selectively connect to multiple antennas (first and second antennas) depending on the operation mode. This multi-functional approach allows the same RF unit to utilize different antennas for different purposes (communication or calibration), achieving improved radiation performance without requiring separate dedicated RF units for each antenna
Solution Approach 2:
The control unit dynamically switches the signal path connection between the first and second antennas based on the detected operation mode. This dynamic reconfiguration allows the system to optimize radiation performance for each mode while using a unified RF unit, avoiding the complexity of having multiple fixed dedicated RF units
3Reliability
If the antenna is positioned away from metallic components, then the antenna performance is improved, but the available installation space is reduced
Solution Approach 1:
The patent divides the antenna system into multiple separate antennas (first antenna and second antenna), each positioned at different locations within the device. This segmentation allows each antenna to be optimally positioned relative to metallic components for its specific function, with the first antenna placed away from metallic components for communication and the second antenna positioned for calibration purposes
Data Source
AI summary
A signal path configuration method and apparatus of a wireless device are provided for avoiding radiation performance degradation caused by holding a specific part of the wireless device. A wireless device of the present invention includes a Radio Frequency (RF) unit that includes a plurality of antennas, an RF connector for RF calibration, and a detection unit for detecting connection of an RF cable, a switch for switching a signal path to one of the plurality of antennas, and a control unit for distinguishing between communication modes based on a detection signal output by the detection unit and for generating a control signal for controlling the switch to connect the signal path to one of the antennas according to the communication mode.