Switchable Side-Surface Antenna Layout for Multi-Band Interference Control
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Solution Overview
Problem
Compact electronic devices face challenges in securing adequate radiation space for multiple antennas due to limited space and interference, especially with expanding display areas, which can degrade antenna performance across various frequency bands.
Innovation Solution
The implementation of a switch circuit that segments conductors according to frequency bands, allowing for controlled coupling and decoupling of conductive portions to optimize antenna performance within a limited space, using a first switch circuit to manage different frequency bands and a second switch circuit to connect to a matching circuit or capacitance element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are included to support communication in different frequency bands, then communication coverage is improved, but interference between antennas degrades performance
Solution Approach 1:
The patent employs switch circuits to dynamically reconfigure the antenna system based on the operating frequency band. The switch circuits selectively connect or disconnect conductive portions, transforming the static antenna structure into a dynamic system that adapts its configuration according to the active communication band, thereby preventing interference between multiple antennas while maintaining broad communication coverage
Solution Approach 2:
The antenna system is segmented into multiple conductive portions that can be independently controlled through switch circuits. Each conductive portion can be selectively activated or deactivated based on the required frequency band, allowing the system to divide the antenna functionality into separate segments that operate without interfering with each other
2Adaptability or versatility
If display area is expanded to provide more visual information, then user information provision is improved, but radiation space for antennas is reduced
Solution Approach 1:
The antenna system uses dynamic reconfiguration through switch circuits to maximize the utilization of limited radiation space. By dynamically switching between different conductive portions and configurations, the system achieves adequate antenna performance in the reduced space available due to the expanded display area
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by selectively connecting different conductive portions with switch circuits. This allows the antenna to maintain proper impedance and resonance characteristics despite the reduced physical radiation space, effectively adapting to the compact form factor required by large display areas
3Reliability
If conductors are segmented according to frequency bands, then antenna performance in specific bands is improved, but device complexity increases
Solution Approach 1:
The switch circuits are designed to perform multiple functions: they not only segment the conductors according to frequency bands but also provide impedance matching, resonance tuning, and interference suppression. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while achieving improved antenna performance across different frequency bands
Data Source
AI summary
An electronic device includes a side surface member, a wireless communication circuit, and a switch circuit. The side surface member includes a first conductive portion coupled to the wireless communication circuit and the switch circuit, a second conductive portion coupled to the switch circuit, and a first non-conductive portion disposed between the first conductive portion and the second conductive portion. The switch circuit is controlled to be in at least one of a first state, a second state, and a third state, based on a first frequency of a first operating signal supplied by the wireless communication circuit. The switch circuit is configured to couple the second conductive portion to the wireless communication circuit, in the first state, and to couple the second conductive portion to the first conductive portion, in the second state.