Ground Plane Antenna Resonance for Miniaturized Mobile Devices
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Solution Overview
Problem
The miniaturization of mobile communication devices limits the size of antenna elements, which in turn affects the radiation characteristics, making it challenging to maintain effective communication performance.
Innovation Solution
A mobile communication device is designed with a ground plane antenna that utilizes a radiation element and a resonant circuit, where the resonant circuit and radiation element resonate at a specific frequency to excite the ground plane, allowing the antenna to radiate through a resonant mode, thereby reducing the size of the antenna element while maintaining its radiation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna element is miniaturized to accommodate the compressed inner space of mobile communication devices, then the device size is reduced, but the radiation characteristic of the antenna element deteriorates
Solution Approach 1:
The patent applies resonance theory to the antenna system, where the radiation element and ground plane form a resonant system at a specific resonant frequency. By tuning the resonant circuit parameters (inductance and capacitance) to match the desired operating frequency, the antenna achieves effective radiation despite the reduced physical size. The resonance condition creates a standing wave pattern that maximizes the electromagnetic field interaction within the constrained space.
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by introducing a resonant circuit with specific inductance and capacitance values. By adjusting these electrical parameters, the antenna's resonant frequency is tuned to match the operating frequency, thereby maintaining radiation efficiency despite the reduced physical dimensions. This parameter optimization allows the antenna to achieve the required radiation characteristics in a miniaturized form factor.
2Area of moving object
If the radiation element area is reduced for miniaturization, then the device becomes more compact, but the antenna cannot maintain sufficient radiation characteristic
Solution Approach 1:
The patent utilizes resonance to enhance the radiation efficiency of the miniaturized antenna. By designing the radiation element and ground plane to resonate at the operating frequency, the system achieves maximum electromagnetic coupling and radiation despite the reduced area. The resonant oscillation creates concentrated electromagnetic fields that compensate for the smaller physical dimensions.
Solution Approach 2:
The patent embeds the resonant circuit (comprising inductance and capacitance elements) within the antenna structure itself. The resonant circuit is integrated into the radiation element or positioned in close proximity, creating a compact nested configuration. This nesting allows the resonant tuning elements to be incorporated without significantly increasing the overall antenna area, maintaining miniaturization while achieving the required radiation characteristics.
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 approach effectively reduces the size of the antenna element while preserving its radiation characteristics, enhancing communication performance and adaptability in miniature device designs.
Implementation Method 1
The resonant circuit and the radiation element resonate at a resonant frequency and excite the ground plane to generate a resonant mode
Data Source
AI summary
A mobile communication device including a ground plane, a radiation element and a resonant circuit is provided. The radiation element is electrically connected to the ground plane. The resonant circuit is electrically connected to the radiation element and receives a feeding signal. The resonant circuit and the radiation element resonate at a resonant frequency and excite the ground plane to generate a resonant mode.