Handheld Device Antenna Frequency Band Switching
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Solution Overview
Problem
Conventional handheld communication devices experience degraded antenna performance due to energy absorption by the user's hand and head, causing a shift to lower frequency bands and reduced data transmission efficiency.
Innovation Solution
A handheld communication device with a sensing element that determines the operating mode and adjusts the antenna module to switch between a first and second frequency band, with the second band being higher than the first when the device is operated in hand mode, to maintain efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna operates in a conventional frequency band designed for free space, then the antenna design is simple and follows standard specifications, but the antenna performance degrades when the device is operated in hand mode due to energy absorption by the user's hand and head
Solution Approach 1:
The patent implements dynamic frequency band switching based on the detected operating mode. The antenna module transitions from a static frequency configuration to a dynamic one where the operating frequency band is adjusted in real-time according to whether the device is in hand mode or not, thereby maintaining optimal antenna performance across different usage scenarios
Solution Approach 2:
The patent employs a sensing element to detect the operating mode (hand mode or not) and provides feedback to the communication module. This feedback mechanism enables the system to automatically adjust the antenna's frequency band accordingly, creating a closed-loop control system that maintains reliable antenna performance despite changes in usage conditions
2Productivity
If the antenna frequency band is fixed, then the device complexity is reduced, but the data transmission efficiency decreases when the device is operated in hand mode due to frequency shift to lower bands
Solution Approach 1:
The patent activates the sensing element when voice communication is established to determine the operating mode in advance. This preliminary detection allows the system to proactively switch to the appropriate frequency band before performance degradation occurs, ensuring maintained data transmission efficiency without reactive delays
Solution Approach 2:
The patent changes the operating parameter (frequency band) of the antenna module based on the detected operating mode. By switching between a first operation frequency band (for non-hand mode) and a second operation frequency band (for hand mode), the system optimizes data transmission efficiency for each specific usage scenario
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 effectively mitigates the performance degradation by shifting to a higher frequency band when the device is used in hand mode, maintaining efficient data transmission and radiation efficiency.
Implementation Method 1
Whether the handheld communication device is operated in a hand mode is determined by activating a sensing element when the voice communication is established
Data Source
AI summary
A communication method used in a handheld communication device is provided. The communication method comprises the steps outlined below. Whether a voice communication is established is determined. When the voice communication is established, a sensing element is activated to determine whether the handheld communication device is operated in a hand mode. When the handheld communication device is not operated in the hand mode, an antenna module of the handheld communication device would be operated in a first operation frequency band to perform the voice communication. When the handheld communication device is operated in the hand mode, the antenna module of the handheld communication device would be operated in a second operation frequency band to perform the voice communication, in which the second operation frequency band is higher than the first operation frequency band. A handheld communication device is disclosed herein as well.