Multi-Band Antenna Design for Compact Wireless Devices
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Solution Overview
Problem
Existing wireless electronic devices face challenges in achieving efficient wireless communications due to interference between antennas and components, limited data throughput, and the need for compact structures that cover multiple communications bands without compromising performance.
Innovation Solution
The implementation of a multi-antenna system within electronic devices, utilizing conductive housing structures and tunable components to optimize antenna performance across various frequency bands, including cellular, WLAN, and satellite navigation bands, through the use of inverted-F and open slot antenna structures, and employing MIMO schemes to enhance data throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas are used to cover multiple frequency bands, then the data throughput and communication coverage are improved, but the device complexity and antenna interference increase
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated antenna structure that can operate across multiple frequency bands (cellular low band, mid band, high band, and WLAN bands) using a single antenna element with configurable impedance, thereby reducing device complexity while maintaining high data throughput through MIMO schemes
Solution Approach 2:
The antenna is designed with universal multi-functionality to cover multiple frequency bands and communication standards (cellular and WLAN) using a single antenna structure with tunable components, eliminating the need for separate antennas for each band and reducing overall system complexity
2Device complexity
If a single antenna is used to cover a particular frequency band, then the device complexity is reduced, but the data throughput becomes insufficient
Solution Approach 1:
The antenna incorporates dynamic tunable components (varactors, switches) that allow real-time adjustment of electrical length and impedance to optimize performance across multiple frequency bands, enabling a single antenna to dynamically adapt its characteristics to match different communication standards and frequency requirements
3Volume of moving object
If antennas are placed close together in compact devices, then the device size is reduced, but antenna interference increases
Solution Approach 1:
The patent implements local quality optimization by positioning the single multi-band antenna in a specific location (lower end of the device) away from the display controller, and using dielectric gaps and conductive housing structures to create localized electromagnetic isolation zones that prevent interference while maintaining compact form factor
4Ease of operation
If display controller is placed at the lower end of the device, then the display functionality is optimized, but the antenna coverage of low frequency bands is blocked
Solution Approach 1:
The patent resolves the spatial conflict by transitioning to another dimension - using dielectric gaps and conductive housing structures that extend vertically to create electromagnetic isolation between the display controller and antenna, allowing both components to occupy the same horizontal plane without interfering with each other's functionality
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 enables efficient wireless communications across multiple frequency bands with improved data throughput and reduced interference, allowing for compact device designs that maximize display area while maintaining optimal antenna performance.
Implementation Method 1
The first and second antennas may have resonating element arms formed from segments of the first conductive sidewall
Data Source
AI summary
An electronic device may have a first conductive sidewall at an upper end, a second conductive sidewall at a lower end, and a conductive rear wall. First and second antennas may be formed at the upper end and may include slots with edges defined by the first sidewall and the rear wall. Third, fourth, fifth, and sixth antennas may be formed at the lower end and may include slots with edges defined by the second sidewall and the rear wall. Each antenna may cover multiple frequency bands. First order and third order modes of the slots may contribute to the frequency responses of the third through sixth antennas. A display controller may be mounted at the lower end and may impose a lower limit on the frequencies covered by the third through sixth antennas. The first and second antennas may cover lower frequencies than the third through sixth antennas.