Tunable Antenna Frequency Band Adaptation
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Solution Overview
Problem
Designing a single antenna to efficiently transmit RF signals across multiple neighboring or different frequency bands is challenging due to variations in antenna efficiency as mobile devices trend towards lightness, slimness, and smallness.
Innovation Solution
An electronic device with a tunable antenna, RF signal transceiving module, coupler, and control unit that adjusts the working frequency band based on signal strength, using capacitors to modify the antenna's capacitance and impedance matching for optimal performance across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single antenna is used to transceive RF signals of multiple neighboring or different frequency bands, then the device achieves lightness, slimness, and smallness, but antenna efficiency varies across different frequency bands
Solution Approach 1:
The patent implements a tunable antenna with adjustable capacitance that can dynamically change its electrical characteristics to match different frequency bands. The antenna structure includes variable capacitors that can be adjusted to tune the resonant frequency, allowing the single antenna to maintain high efficiency across multiple frequency bands by adapting its parameters in real-time
Solution Approach 2:
The patent changes the electrical parameters of the antenna by incorporating adjustable capacitors that modify the capacitance value. This parameter adjustment allows the antenna to be tuned to different frequency bands, resolving the contradiction between maintaining versatility and ensuring reliable performance across bands by optimizing the antenna's electrical characteristics for each specific frequency
2Adaptability or versatility
If a single antenna is used to transceive RF signals of multiple neighboring or different frequency bands, then the device achieves lightness, slimness, and smallness, but the device complexity increases due to tuning requirements
Solution Approach 1:
The patent designs a single antenna structure that serves multiple frequency bands through capacitive tuning, eliminating the need for separate antennas for each band. The same antenna physical structure performs the function of multiple frequency-specific antennas by adjusting its capacitance, thereby reducing overall device complexity while maintaining versatility
Solution Approach 2:
The patent combines multiple antenna functions into a single physical antenna structure with adjustable capacitance. Instead of having separate antennas for different frequency bands, the invention merges them into one tunable antenna that can be configured for different bands, simplifying the device architecture while maintaining multi-band capability
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
Enables adaptive frequency adjustment, maintaining good emitting efficiency and antenna gain across different frequency bands, ensuring reliable RF signal transmission in mobile devices.
Implementation Method 1
The coupler is coupled between the tunable antenna and the RF signal transceiving module, and couples the at least one RF signal to derive a coupling signal
Implementation Method 2
The tunable antenna, and transmits at least one RF signal through the tunable antenna... outputs the at least one control signal to the tunable antenna to adjust a working frequency band of the tunable antenna
Data Source
AI summary
An electronic device including a tunable antenna, a radio frequency (RF) signal transceiving module, a coupler and a control unit, is provided. The RF signal transceiving module is coupled to the tunable antenna, transmits at least one RF signal through the tunable antenna. The coupler is coupled between the tunable antenna and the RF signal transceiving module, and couples the at least one RF signal to derive a coupling signal. The control unit receives the coupling signal and generates at least one control signal according to a signal strength of the RF signal in a specific frequency band, and outputs the at least one control signal to the tunable antenna so as to adjust a working frequency band of the tunable antenna.