Antenna With Circular Feeding Coupling Structure
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Solution Overview
Problem
Existing antennas face challenges in achieving high efficiency and impedance matching across a broader frequency band, particularly in compact designs for wireless appliances, where the conventional feeding line is not utilized effectively.
Innovation Solution
The antenna employs a circular feeding coupling structure, where the feeding line acts as an independent antenna, forming an array with the mounted antenna, reducing electrical length and enhancing impedance matching through capacitor coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional feeding line is used to feed power to the antenna, then the antenna can be powered, but the feeding line cannot serve as an antenna, resulting in lower antenna efficiency
Solution Approach 1:
The feeding line is designed to serve dual purposes: it functions as both a power feeding line and as an independent antenna element. The feeding line has a specific structure with a first end connected to a power amplifier and a second end forming part of the antenna system, allowing it to radiate electromagnetic waves while still performing its feeding function.
Solution Approach 2:
The patent combines the feeding line with the antenna system by mounting an additional antenna on the feeding line. This creates a integrated structure where the feeding line and the mounted antenna work together as a combined antenna system, improving overall efficiency.
2Reliability
If the antenna electrical length is increased to improve radiation performance, then the radiation performance improves, but the antenna size increases, which is not suitable for compact wireless devices
Solution Approach 1:
The patent uses a three-dimensional configuration where the feeding line extends in one dimension and the mounted antenna is positioned in another dimension. This spatial arrangement allows the system to achieve the required electrical length for good radiation performance while keeping the overall footprint compact through vertical or lateral stacking.
Solution Approach 2:
The mounted antenna is positioned on or near the feeding line, creating a nested or compact arrangement where one antenna structure is integrated with the feeding line structure. This allows the electromagnetic paths to be extended without proportionally increasing the overall device size.
3Device complexity
If a simple feeding structure is used, then the device complexity is reduced, but the impedance matching across broad frequency bands cannot be achieved
Solution Approach 1:
The feeding line and the mounted antenna are electrically connected through a coupling mechanism, creating a combined antenna system. This merging allows the system to achieve broadband impedance matching through the interaction between the feeding line and the mounted antenna, without requiring complex additional matching circuits.
Solution Approach 2:
The coupling mechanism acts as an intermediary between the feeding line and the mounted antenna. This coupling structure facilitates electromagnetic energy transfer and enables impedance transformation, allowing broadband matching while maintaining relative structural simplicity.
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 increases antenna efficiency, reduces the electrical length, and achieves broader band impedance matching, making it suitable for compact wireless devices.
Implementation Method 1
the impedance matching for a broader band can be achieved by using a coupling
Data Source
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AI summary
Disclosed is an antenna. The antenna includes a first radiating part bent in a predetermined direction, a second radiating part under the first radiating part, a conductive member connected to the second radiating part, and a coupling part spaced apart from the conductive member while surrounding a lateral side of the conductive member.