Low-Band Antenna Tuner Placement for Multi-Band Efficiency
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Solution Overview
Problem
Existing mobile electronic devices face challenges in achieving optimal antenna efficiency due to physical constraints and interference from tuners, particularly in small form factor devices that use low band antennas.
Innovation Solution
The implementation of systems and methods for selecting the best type of tuners and determining optimal placements along the length of each antenna, using aperture and impedance tuners to change the operating characteristics of antennas and avoid resonances that reduce efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tuners are added to low band antennas to enable multi-frequency operation, then adaptability is improved, but antenna efficiency deteriorates due to interference and resonances from the tuners
Solution Approach 1:
The patent introduces an aperture tuner as an intermediary component between the low band antenna and other antennas. This aperture tuner acts as a mediator that controls electromagnetic coupling, allowing the low band antenna to operate across multiple frequencies while preventing harmful resonances and interference with other antennas in the device.
Solution Approach 2:
The patent employs aperture tuners that dynamically adjust electrical parameters (aperture size/position) to change the operating characteristics of the low band antenna. By varying these parameters, the antenna can operate at different frequencies while maintaining efficiency and avoiding resonances that would otherwise degrade performance.
2Device complexity
If the antenna matching network is placed close to the antenna to save space, then device complexity is reduced, but antenna efficiency deteriorates due to interference from tuner components
Solution Approach 1:
The aperture tuner serves as a spatial intermediary that allows the matching network to be positioned close to the antenna without causing interference. It mediates the electromagnetic interaction between the closely-spaced components, enabling compact layout while maintaining antenna efficiency by controlling coupling and preventing resonances.
3Adaptability or versatility
If aperture tuners are used to shift frequency response, then adaptability is improved, but harmful resonances are generated that reduce overall system performance
Solution Approach 1:
The patent converts the potentially harmful resonances generated by aperture tuners into beneficial effects. By carefully designing the aperture tuner configuration and control algorithm, the system exploits resonant frequencies to enhance signal strength at desired frequencies while suppressing unwanted resonances, thereby improving overall antenna performance.
Solution Approach 2:
The patent dynamically changes the electrical parameters of the aperture tuner to shift the resonant frequencies to beneficial values. By adjusting the aperture size and position, the system can move harmful resonances out of the operating bandwidth or transform them into constructive interference patterns that enhance signal transmission.
Data Source
AI summary
The disclosed system may include an antenna and an antenna matching network. The antenna matching network may include an aperture tuner configured to shift a frequency response of the antenna and an impedance tuner configured to dynamically change an amount of radiated power for the antenna. The antenna matching network may be positioned at least a specified minimum distance from the antenna according to various operating characteristics of the antenna. Various other apparatuses, wearable electronic devices, and methods of manufacturing are also disclosed.