Loop Antenna on Grounding Element Edge for Multiband Wireless
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Solution Overview
Problem
Conventional communication electronic devices with built-in multiband antennas face challenges in achieving wideband operation while being closely integrated with peripheral elements, and the antenna's radiation performance is affected by the user's hand due to close proximity.
Innovation Solution
The antenna structure features a grounding element with notches and a protruded portion at its edge, where a loop antenna is positioned on a different plane, allowing for a closed loop configuration that excites resonant modes to cover 824 MHz to 960 MHz and 1710 MHz to 2170 MHz bands, reducing hand influence and enabling integration with data transfer ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the loop antenna occupies the overall edge of the grounding element to achieve wideband operation, then the operating bandwidth is improved, but the integration with peripheral electronic elements deteriorates
Solution Approach 1:
The patent moves the loop antenna from the edge plane to a different plane (e.g., inner surface or back surface) of the grounding element. This spatial relocation allows the antenna to coexist with peripheral electronic elements on the edge without occupying the same space, thereby maintaining wideband operation while enabling proper integration with data transfer ports and other components.
2Area of stationary object
If the antenna element is disposed at the edge of the grounding element, then the integration with peripheral elements is improved, but the radiation performance deteriorates due to user hand influence
Solution Approach 1:
By relocating the antenna element to a different plane away from the edge, the patent increases the distance between the antenna and the user's hand during device operation. This spatial separation reduces the detrimental influence of the user's hand on radiation performance while still allowing the antenna to be integrated with the grounding element structure.
3Ease of manufacture
If the antenna structure uses a conventional edge-disposed loop antenna, then the manufacturing simplicity is maintained, but the near-field radiation increases causing hand interference
Solution Approach 1:
The patent maintains manufacturing simplicity by using a standard loop antenna structure but changes its spatial disposition to a different plane. This configuration change reduces near-field radiation and hand interference without complicating the manufacturing process, as the antenna can still be fabricated using conventional techniques.
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 design achieves reduced near-field radiation and improved integration with peripheral elements, satisfying five-band WWAN operation requirements by minimizing hand interference and optimizing antenna performance.
Implementation Method 1
The loop antenna can be coupled to the grounding element through the shorting end in order to excite a resonant mode for forming a first operating band
Data Source
AI summary
A communication electronic device includes a grounding element and an antenna element. There is a first notch, a second notch and a first protruded portion disposed at an edge of the grounding element, and the first notch and the second notch are not located at corners of the edge of the grounding element. The first protruded portion is located between the first notch and the second notch. The antenna element and the grounding element are disposed on different planes. The antenna element has a projection on the grounding element, and the projection covers a portion of the first protruded portion, a portion of the first notch and a portion of the second notch.