Antenna Switching Circuit for Communication Terminals
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Solution Overview
Problem
The quality of data transmission in communication terminals is affected when a user inadvertently holds the portion of the terminal where the antenna is disposed, causing a deviation in the resonance frequency and poor signal quality.
Innovation Solution
A terminal equipped with a first and second multiband antenna, a radio frequency transceiver, and a switching control circuit that connects the primary and secondary carrier wave ports with the appropriate antennas based on signal quality conditions to ensure continuous communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single antenna is used in the terminal, then the device complexity is reduced, but the communication reliability deteriorates when the antenna signal quality is poor due to user holding
Solution Approach 1:
The patent combines multiple antennas (first antenna and second antenna) into a unified antenna system with a switching control circuit that manages their operation. This merging approach allows the system to maintain high communication reliability by switching between antennas while avoiding the complexity of managing completely separate antenna systems, as the switching circuit integrates the control logic for both antennas in a coordinated manner
2Adaptability or versatility
If the antenna structure is simplified to reduce device complexity, then the ease of manufacture is improved, but the adaptability to different signal quality conditions deteriorates
Solution Approach 1:
The patent implements a dynamic antenna system where the switching control circuit continuously monitors signal quality and automatically switches between the first and second antennas based on real-time conditions. This dynamic adaptation allows the system to respond to changing signal quality conditions (such as when a user holds the terminal) without requiring complex manual intervention or overly complicated antenna structures, achieving versatility through controlled dynamic behavior
3Productivity
If no antenna switching mechanism is implemented, then the device complexity is reduced, but the productivity of data transmission deteriorates when signal quality is poor
Solution Approach 1:
The patent incorporates a feedback mechanism where the switching control circuit monitors the signal quality from the antenna and uses this feedback information to determine when to switch between the first and second antennas. This feedback-driven approach ensures that data transmission productivity is maintained by automatically selecting the antenna with better signal quality, while the complexity is managed through a systematic feedback control architecture rather than ad-hoc complex control mechanisms
Data Source
AI summary
A terminal having a communication function includes: a first multiband antenna; a second multiband antenna; a radio frequency transceiver including a primary carrier wave port and a secondary carrier wave port; and a switching control circuit electrically connected with the primary carrier wave port, the secondary carrier wave port, the first multiband antenna, and the second multiband antenna. The switching control circuit is configured to connect the primary carrier wave port with the first multiband antenna and connect the secondary carrier wave port with the second multiband antenna if signal quality of the first multiband antenna meets a preset quality condition, and connect the primary carrier wave port with the second multiband antenna and connect the secondary carrier wave port with the first multiband antenna if the signal quality of the first multiband antenna does not meet the preset quality condition.