Compact Multi-Frequency Ring Antenna Design
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Solution Overview
Problem
Existing SRR antenna designs for wireless communication terminals face challenges in downsizing while achieving multi-frequency resonance, as disclosed methods often require multiple antenna elements to accommodate different frequencies.
Innovation Solution
A compact antenna design featuring a ring-shaped conductor with air gaps and auxiliary conductors, where the capacitance of air gaps and conductor lengths are strategically arranged to create distinct resonance frequencies, allowing for multi-frequency operation within a single element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two SRR antenna elements are arranged side by side to achieve two frequencies, then multi-frequency resonance is achieved, but the apparatus size increases
Solution Approach 1:
The patent combines multiple SRR antenna elements into a single integrated structure where conductors are connected to form a unified antenna that resonates at multiple frequencies, eliminating the need for separate side-by-side elements
Solution Approach 2:
The antenna design enables a single antenna structure to perform multiple functions by resonating at different frequencies through controlled capacitance values and conductor arrangements, making one element serve multiple frequency bands
2Adaptability or versatility
If multiple SRR antenna elements are used for different frequencies, then frequency coverage is improved, but device complexity increases
Solution Approach 1:
Multiple antenna elements are merged into a single connected structure where conductors are electrically connected to form one integrated antenna system, reducing structural complexity while maintaining multi-frequency capability
Solution Approach 2:
Different regions of the antenna structure have different capacitance values and conductor configurations that are optimized for specific frequency ranges, allowing each part to contribute to overall frequency coverage
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 design enables a small antenna to resonate at multiple frequencies, improving upon previous methods by reducing the size and complexity required for multi-frequency operation, comparable to using two separate antenna elements.
Implementation Method 1
a value obtained by multiplying a length of an outer periphery of a region surrounded by a part including the air gap out of the first conductor and the third conductor, by capacitance of the air gap, being different from a value obtained by multiplying a length of an outer periphery of a region surrounded by the second conductor, the third conductor, and the first conductor, by capacitance of the first gap
Implementation Method 2
an antenna that is small and resonates at a plurality of frequencies
Data Source
AI summary
In order to provide an antenna that is small and resonates at a plurality of frequencies, an antenna according to the present invention is provided with: a first conductor of a ring shape, having an air gap; a second conductor arranged inside the ring, with both ends of the second conductor connected to the first conductor, having a first gap; and a third conductor arranged in a region surrounded by a part not including the air gap out of the first conductor, and the second conductor, with both ends connected to the first conductor, having a second gap, and a value obtained by multiplying a length of an outer periphery of a region surrounded by a part including the air gap out of the first conductor, and the third conductor, by capacitance of the air gap is different from a value obtained by multiplying a length of an outer periphery of a region surrounded by the second conductor, the third conductor, and the first conductor, by capacitance of the first gap.