Compact Multi-Band Antenna Structure Using Nested Dual Resonance
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Solution Overview
Problem
The challenge is to design an antenna structure for miniaturized electronic devices that can efficiently cover multiple wireless frequency bands within limited internal space while maintaining good antenna efficiency.
Innovation Solution
The antenna structure incorporates a first radiating element, a grounding element, and a second radiating element, with specific configurations that form a surrounding structure and generate multiple operating frequency bands through dual resonance modes, allowing for the coverage of both low and high frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna structure is miniaturized to reduce device size, then the portability is improved, but the space for arranging the antenna is reduced and antenna efficiency deteriorates
Solution Approach 1:
The patent implements nesting by placing the first radiating element inside the opening formed by the second radiating element and grounding element. This nested configuration allows multiple antenna elements to occupy overlapping spatial regions, effectively increasing the antenna's electrical size without increasing the device's external dimensions, thereby maintaining antenna efficiency in miniaturized devices
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by extending radiating elements in different directions (first direction for second radiating element, second direction for first radiating element) and forming a surrounding structure. This dimensional approach allows the antenna to achieve sufficient radiation area and multiple resonance modes within a compact footprint, resolving the conflict between device size and antenna efficiency
2Adaptability or versatility
If multiple antenna elements are added to cover more frequency bands, then the frequency band coverage is improved, but the device complexity increases
Solution Approach 1:
The patent achieves multi-functionality by designing the second radiating element and first radiating element to operate across multiple frequency bands simultaneously. The second radiating element with extended portions covers lower frequency bands, while the first radiating element covers higher frequency bands, allowing a single antenna structure to perform multiple communication functions without requiring separate antennas for each band
Solution Approach 2:
The patent combines multiple radiating elements and grounding structures into an integrated antenna assembly where the first radiating element, second radiating element, and grounding element work together as a unified structure. This merging approach consolidates what would traditionally require multiple separate antennas into a single compact unit, reducing device complexity while maintaining broad 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
This configuration enables the antenna structure to effectively cover a wide range of frequency bands, including low and high frequency operations, making it suitable for various mobile communication systems such as 3G, 4G, 5G, and LTE, while minimizing the device's size and maintaining good antenna efficiency.
Implementation Method 1
the feeding portion, the second radiating portion, the first radiating portion and the grounding portion generate a first operating frequency band and a second operating frequency band
Data Source
AI summary
An electronic device is provided. The electronic device includes an antenna structure and a housing. The antenna structure includes a first radiating element, a grounding element, and a second radiating element. The first radiating element includes a first radiating portion and a grounding portion. Two ends of the grounding portion are respectively connected with the first radiating portion and the grounding element. The first radiating portion, the grounding portion and the grounding portion form a surrounding structure. The second radiating element includes a second radiating portion, a third radiating portion, a fourth radiating portion, and a feeding portion connected between the second radiating portion, the third radiating portion and the fourth radiating portion. The second radiating portion and the first radiating portion are separated from each other and couple to each other.