Electrically Small Antenna Tuning by Support Structure Deformation
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Solution Overview
Problem
Electrically small antennas face challenges in tuning due to their small size, which can result in loss of bandwidth for wireless signals, making it difficult to adjust their frequency effectively.
Innovation Solution
The method involves applying forces to the support structure of the antenna to change the shape or dimensions of the radiating element, using mechanical actions, thermal expansion, or torsional forces to adjust the resonant frequency without affecting the bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced to fit into small spaces, then the compactness is improved, but the bandwidth is reduced
Solution Approach 1:
The patent applies dynamics by making the antenna structure adjustable through mechanical forces. The support structure can be deformed elastically to change the resonant frequency of the radiating element, enabling the antenna to adapt its electrical characteristics without changing its physical size. This dynamic adjustment capability allows a small antenna to achieve variable frequency operation with maintained bandwidth.
Solution Approach 2:
The patent changes physical parameters of the antenna system by applying mechanical forces to alter the shape and dimensions of the radiating element. By varying parameters such as the length, width, or curvature of the radiating element through controlled deformation, the resonant frequency and impedance can be adjusted, thereby maintaining bandwidth performance in a compact form factor.
2Adaptability or versatility
If mechanical tuning methods are used to adjust frequency, then the frequency adjustment capability is improved, but the device complexity is increased
Solution Approach 1:
The patent employs a flexible support structure that can be elastically deformed by applied forces. This flexible support structure eliminates the need for complex mechanical tuning mechanisms by using the inherent elasticity of the material to achieve frequency adjustment. The radiating element's geometry is modified through controlled deformation of the flexible support, providing simple yet effective frequency tuning.
3Adaptability or versatility
If forces are applied to change the radiating element shape, then the resonant frequency adjustment is improved, but the structural stability is worsened
Solution Approach 1:
The patent implements dynamic structural characteristics where the support structure is designed to be elastically deformable rather than rigid. This allows the structure to accommodate frequency tuning through controlled deformation while maintaining structural integrity. The elastic properties enable reversible shape changes that adjust resonant frequency without compromising the overall structural stability of the antenna assembly.
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 allows for easy and automatic tuning of electrically small antennas, ensuring that the wireless signal's frequency can be adjusted without losing bandwidth, enhancing their performance in small spaces.
Implementation Method 1
heating the support structure to expand the support structure, thereby changing a shape or a dimension of the radiating element
Implementation Method 2
applying forces to the support structure to change a shape or a dimension of the radiating element
Implementation Method 3
applying at least a first force to the support structure to an upper portion of the support structure in a first direction to create a torsion on the support structure
Data Source
AI summary
A method of tuning an electrically small antenna comprising a radiating element and a support structure comprises applying a force to the support structure to change a shape or a dimension of the radiating element to increase or decrease a frequency at which the electrically small antenna resonates.