Conductive Frame Antenna Switching for Multi-Band Terminal Devices
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Solution Overview
Problem
Traditional antenna technologies conflict with the demands for small form factor and high screen-to-body ratio in terminal devices, leading to space occupation issues, as different antenna structures are required for various frequency bands.
Innovation Solution
A terminal device design that utilizes a conductive frame with multiple connecting points and switch modules to form antennas for different frequency bands, allowing for the same frame to function as multiple antennas by switching connections, thereby reducing the number of components and space occupied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional antenna technology is used to support multiple frequency bands, then communication coverage is improved, but the space occupied in the terminal device increases
Solution Approach 1:
The conductive frame is designed to serve multiple functions: it acts as both the structural housing frame and as an antenna radiator for multiple frequency bands. By configuring different portions of the same conductive frame as radiators for different frequency bands (first frequency band, second frequency band, third frequency band), the antenna system achieves multi-functionality without requiring separate antenna structures for each band, thereby reducing the overall space occupied while maintaining broad frequency coverage
Solution Approach 2:
The patent merges the housing frame structure with the antenna radiator structure by making the conductive frame serve dual purposes. The frame that provides structural support is simultaneously configured as the radiating element for multiple frequency bands through strategic selection of conductor portions and grounding arrangements, eliminating the need for separate antenna components and reducing total device footprint
2Adaptability or versatility
If multiple antenna structures are used for different frequency bands, then frequency band coverage is improved, but the device complexity increases
Solution Approach 1:
The conductive frame is designed to serve multiple functions: it acts as both the structural housing frame and as an antenna radiator for multiple frequency bands. By configuring different portions of the same conductive frame as radiators for different frequency bands (first frequency band, second frequency band, third frequency band), the antenna system achieves multi-functionality without requiring separate antenna structures for each band, thereby reducing the overall space occupied while maintaining broad frequency coverage
Solution Approach 2:
The patent merges the housing frame structure with the antenna radiator structure by making the conductive frame serve dual purposes. The frame that provides structural support is simultaneously configured as the radiating element for multiple frequency bands through strategic selection of conductor portions and grounding arrangements, eliminating the need for separate antenna components and reducing total device footprint
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
This design enhances space utilization in terminal devices by allowing a single conductive frame to form antennas for various frequency bands, reducing the overall space required for antennas and improving radiation performance across different frequency ranges.
Implementation Method 1
a first antenna is formed by connecting the feeding point and the first frame connecting point... a second antenna is formed by connecting the feeding point and the second frame connecting point
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A terminal device includes: a housing (11) including a conductive frame (104) provided with a first frame connecting point (12), a second frame connecting point (13) and a grounding point (14); and a feeding point (16) disposed on a circuit board and configured to input or output an electric signal; a first antenna formed by the feeding point (16), a first signal wire (17), the first frame connecting point (12), the third signal wire and the conductive frame (104); and a second antenna formed by the feeding point (16), a second signal wire (18), the third signal wire, the second frame connecting point (13) and the conductive frame (104).