Antenna Impedance Matching for Hinged Electronic Devices
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Solution Overview
Problem
The use of metal housing in hand-held electronic devices, such as ultrabook computers, affects the antenna's transmission/reception characteristics due to varying angles between the screen and base, leading to degraded signal performance, and existing technologies struggle to maintain high antenna performance across different states of the device.
Innovation Solution
An electronic device with a sensing unit and processing unit that detects the distance between main bodies and adjusts the impedance matching of the antenna by generating a control signal to optimize the impedance matching circuit, ensuring the best possible signal reception, even when the device is closed or opened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna is moved to the base near the hinge due to metal housing design, then the design flexibility and metal housing usage are improved, but the transmission/reception characteristics of the antenna are degraded when the angle between screen and base varies
Solution Approach 1:
The patent applies dynamics by making the impedance matching circuit adjustable based on the opening angle of the device. The system dynamically adapts the electrical characteristics of the antenna system according to the mechanical state (open/closed angle), allowing the antenna to maintain optimal performance across different configurations despite its fixed position near the hinge.
Solution Approach 2:
The patent changes electrical parameters (impedance matching values) based on the mechanical parameter (opening angle). By detecting the angle and corresponding the impedance matching value to it, the system adjusts the electrical characteristics of the antenna system to compensate for the degradation caused by the fixed position near the hinge, thereby maintaining reliable transmission/reception characteristics.
2Device complexity
If the impedance matching circuit is fixed, then the device complexity is reduced, but the antenna performance degrades when the device state changes
Solution Approach 1:
The patent implements feedback by detecting the opening angle of the device and using this information to adjust the impedance matching circuit accordingly. The sensing unit monitors the mechanical state, and the processing unit uses this feedback to automatically select or adjust the appropriate impedance matching values, ensuring optimal antenna performance without requiring manual intervention.
Solution Approach 2:
The patent creates a universal impedance matching solution that handles multiple device states (different opening angles) through a single adaptive system. Rather than designing separate matching circuits for each angle, the system uses one matching circuit that can be dynamically adjusted to serve multiple functions across different operational configurations.
3Ease of manufacture
If the antenna position is fixed near the hinge, then the metal housing design is simplified, but the signal transmission/reception is degraded in various device states
Solution Approach 1:
The patent introduces an intermediary impedance matching circuit between the fixed antenna and the radio frequency front end. This intermediary component acts as a mediator that compensates for the degradation caused by the fixed antenna position near the hinge, adjusting the electrical characteristics to maintain reliable signal transmission/reception despite the simplified mechanical design.
4Reliability
If the antenna is disposed on the top of the screen, then the signal reception is stable, but the design flexibility for metal housing devices is limited
Solution Approach 1:
The patent applies dynamics by making the impedance matching circuit adjustable based on the opening angle of the device. The system dynamically adapts the electrical characteristics of the antenna system according to the mechanical state (open/closed angle), allowing the antenna to maintain optimal performance across different configurations despite its fixed position near the hinge.
Solution Approach 2:
The patent changes electrical parameters (impedance matching values) based on the mechanical parameter (opening angle). By detecting the angle and corresponding the impedance matching value to it, the system adjusts the electrical characteristics of the antenna system to compensate for the degradation caused by the fixed position near the hinge, thereby maintaining reliable transmission/reception characteristics.
Data Source
AI summary
An electronic device and an antenna reception tuning method thereof are provided. The electronic device includes a first main body, a second main body, a sensing unit, and a processing unit. The second main body, including an antenna and a matching unit, is disposed on the first main body through a hinge and adapted for being opened or closed relative to the first main body. The sensing unit is disposed on the electronic device, adapted for detecting a distance between the first main body and the second main body, and generates a control signal according to the distance, wherein the distance includes an angle and an open/close state between the first and the second main bodies. The processing unit is electrically connected to the sensing unit and the matching unit, and adjusts the matching unit according to the received control signal.