Switchable Antenna Branch for Balanced RF Performance
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Solution Overview
Problem
Terminal antennas exhibit imbalanced performance in low-frequency communication when in 'beside-head-and-hand-left' and 'beside-head-and-hand-right' statuses due to low-frequency current nulls located near the edges, affecting communication quality.
Innovation Solution
An antenna design with a first adjustable device that can be switched on or off to connect or disconnect the antenna branch between the feedpoint of a primary radio frequency channel and the antenna body, along with additional adjustable devices for impedance adjustment, ensures balanced performance by shifting the low-frequency current null to optimize radiation and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the antenna branch is connected to the antenna body, then the low-frequency current null is close to the edge of the terminal, but this causes imbalanced performance in beside-head-and-hand-left and beside-head-and-hand-right statuses
Solution Approach 1:
The patent applies the dynamics principle by making the antenna branch connectable and disconnectable from the antenna body through a switchable connection. The connection state of the antenna branch can be dynamically adjusted based on the terminal's usage scenario (hand holding status), allowing the system to adapt between different antenna configurations to maintain balanced communication performance in both beside-head-and-hand-left and beside-head-and-hand-right statuses.
Solution Approach 2:
The patent applies the parameter changes principle by altering the electrical connection parameters of the antenna system. By switching the connection state of the antenna branch (connected or disconnected), the current distribution parameters and impedance characteristics of the antenna are changed, thereby adjusting the low-frequency current null position and achieving balanced performance across different hand holding scenarios.
2Reliability
If the first adjustable device is switched on or off to connect or disconnect the antenna branch, then the performance balance is improved, but the device complexity increases
Solution Approach 1:
The switchable connection structure implements dynamics by allowing the antenna branch to be dynamically connected or disconnected based on detected usage scenarios. This dynamic reconfiguration enables the system to adapt to different hand holding statuses, improving communication performance balance while maintaining a relatively simple overall structure through scenario-based control.
Data Source
AI summary
An antenna, an antenna control method, and a terminal, where the antenna includes an antenna body and an antenna branch, where one end of the antenna branch is coupled to the antenna body, the other end is coupled to a feedpoint of a primary radio frequency channel, and the end of the antenna branch that is coupled to the feedpoint of the primary radio frequency channel is further coupled to the antenna body through a first adjustable device, where the first adjustable device is in an on state or an off state. An antenna branch is coupled between the feedpoint of the primary radio frequency channel and the antenna body, and the antenna branch is capable of coupling or decoupling by switching on or off the first adjustable device.