Switchable Antenna Grounding Across PCB and Component Grounds
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Solution Overview
Problem
Existing electronic devices face challenges in optimizing antenna radiation performance across different frequency bands due to variations in ground size requirements, leading to deteriorated performance in specific frequency bands.
Innovation Solution
The electronic device incorporates a switch circuit that selectively connects the conductive portion of the antenna to either a first ground provided by the PCB or a second ground provided by electronic components, allowing for dynamic adjustment based on the frequency band of the signal being transmitted or received.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is connected to a fixed ground structure, then the device structure is simple, but the radiation performance deteriorates in specific frequency bands
Solution Approach 1:
The patent implements a switchable ground connection system where the antenna can dynamically connect to different ground structures (first ground or second ground) depending on the operating frequency band. This dynamic reconfiguration allows the antenna to optimize its radiation performance for different frequency ranges while maintaining a relatively simple overall structure through the use of a control circuit that automatically selects the appropriate ground connection.
2Reliability
If a single ground structure is used for the antenna, then the device complexity is low, but the signal gain deteriorates in specific frequency bands
Solution Approach 1:
The patent employs different ground structures (first ground and second ground) optimized for different frequency bands. The first ground is optimized for lower frequency bands while the second ground is optimized for higher frequency bands. The control circuit selectively connects the antenna to the appropriate ground structure based on the operating frequency, ensuring optimal signal gain for each frequency band without requiring a complex ground structure for all frequencies simultaneously.
3Reliability
If the antenna ground is optimized for one frequency band, then the radiation efficiency is high for that band, but the performance deteriorates for other frequency bands
Solution Approach 1:
The patent creates a multi-functional ground connection system where a single antenna can operate efficiently across multiple frequency bands by selectively connecting to different ground structures. The first ground structure optimizes performance for lower frequency bands, while the second ground structure optimizes performance for higher frequency bands. The control circuit enables the antenna to adapt its ground connection based on the operating frequency, achieving universal compatibility across different frequency ranges while maintaining high radiation efficiency in each band.
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 solution enhances radiation performance by optimizing signal gain for specific frequency bands, improving communication efficiency by selectively connecting the antenna to the appropriate ground, thereby enhancing communication performance.
Implementation Method 1
a switch circuit configured to electrically connect the conductive portion to the ground layer of the PCB or the electronic component
Implementation Method 2
The conductive member may be configured to change a coupling position between the conductive portion and the electronic component within the conductive portion, by being electromagnetically coupled with the electronic component
Implementation Method 3
the wireless communication circuitry is configured to communicate with the external electronic device based on a resonant frequency according to the changed coupling position
Data Source
AI summary
An electronic device may include: at least one processor; memory storing instructions; a housing including a support; a conductive portion; a printed circuit board (PCB) providing a first ground; an electronic component providing a second ground; a switch circuit configured to electrically connect the conductive portion to the ground layer of the PCB or the electronic component; and wireless communication circuitry configured to communicate with an external electronic device through the conductive portion. The instructions, when executed by the at least one processor individually or collectively, may cause the electronic device to: control the switch circuit, when the wireless communication circuitry transmits a signal on a first frequency band, to electrically connect the conductive portion to the PCB, and control the switch circuit, when the wireless communication circuitry transmits a signal on a second frequency band, to electrically connect the conductive portion to the electronic component.