Multi-frequency antenna with switchable capacitive loading
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Solution Overview
Problem
The demand for a single antenna device capable of switching between different frequency bands to be compatible with multiple wireless communication technologies such as GPS, Wi-Fi, and Bluetooth has not been effectively met by existing technologies, which typically require multiple antennas for different frequency bands.
Innovation Solution
A multiple-frequency antenna device is designed with an antenna unit and a frequency switch unit, where the frequency switch unit includes a switching component and frequency adjustment components that allow the antenna unit to resonate at different frequencies by switching between various states, enabling compatibility with multiple wireless communication technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used for different wireless communication technologies, then compatibility with multiple frequency bands is achieved, but device complexity and space occupation increase
Solution Approach 1:
The patent implements a single antenna structure that can operate across multiple frequency bands by incorporating switchable capacitive loading elements. The antenna unit is designed with a resonant frequency that can be dynamically adjusted by connecting different capacitance values to ground through switching components, enabling one antenna to perform multiple frequency band functions instead of requiring separate antennas for each band
Solution Approach 2:
The patent employs dynamic frequency adjustment by using switching components (such as transistors or relays) that can connect or disconnect different capacitive elements based on the desired operating frequency band. This dynamic reconfiguration allows the antenna to adapt its electrical characteristics in real-time, transforming a static single-frequency antenna into a multi-frequency capable structure
2Adaptability or versatility
If multiple antennas are used for different wireless communication technologies, then compatibility with multiple frequency bands is achieved, but the area occupied increases
Solution Approach 1:
The patent implements a single antenna structure that can operate across multiple frequency bands by incorporating switchable capacitive loading elements. The antenna unit is designed with a resonant frequency that can be dynamically adjusted by connecting different capacitance values to ground through switching components, enabling one antenna to perform multiple frequency band functions instead of requiring separate antennas for each band
Solution Approach 2:
The patent combines multiple frequency band capabilities into a single integrated antenna structure. By merging the radiating element with switchable capacitive loading networks, the design consolidates what would traditionally require multiple separate antennas into one unified structure, reducing the total space occupied while maintaining multi-band compatibility
3Adaptability or versatility
If frequency adjustment components are added to enable multi-frequency operation, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent divides the frequency adjustment function into separate modular components: a resonant antenna unit, switchable capacitive elements, and control switching components. This segmentation allows each part to perform a specific function independently, making the overall system easier to design, manufacture, and maintain while still achieving complex multi-frequency operation
Solution Approach 2:
The patent introduces switching components as intermediary elements that connect the antenna unit to different capacitive loading options. These switching components act as mediators that enable frequency band selection without requiring direct modification of the antenna structure itself, simplifying the overall design by isolating the frequency control function from the radiating element
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
The device allows electronic devices to perform wireless communication or data transmission across different frequency bands, with adjustable resonant frequencies achieved through the use of passive components like capacitors, inductors, and resistors, enhancing compatibility and versatility.
Implementation Method 1
the antenna unit and the frequency switch unit are cooperatively resonant at a first resonant frequency... the antenna unit and the frequency switch unit are cooperatively resonant at a second resonant frequency different from the first resonant frequency
Data Source
AI summary
A multiple-frequency antenna device includes an antenna unit and a frequency switch unit. The antenna unit includes an insulating substrate on which grounded first and second conductive layers are disposed. The first conductive layer is further connected to a radio-frequency (RF) circuit. The frequency switch unit is connected to the antenna unit in parallel, and includes a switching component, and a frequency adjustment: component connected to the antenna unit. The multiple-frequency antenna device is resonant at a first resonant frequency when the switching component is switched to a first state, and is resonant at a different, second resonant frequency when the switching component is switched to a second state.