Extended Grounding Structure for Antenna Efficiency
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Solution Overview
Problem
The miniaturization of mobile electronic devices often results in insufficient ground plane sizes for antennas, leading to poor antenna efficiency and degraded communication quality.
Innovation Solution
The implementation of an extended grounding structure with a symmetrical design that is electrically connected to the ground plane, effectively increasing the antenna's ground plane size and improving matching characteristics, thereby enhancing communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the mobile electronic device is miniaturized to achieve compact appearance, then the device size is reduced, but the ground plane size of the antenna becomes insufficient
Solution Approach 1:
The patent extends the ground plane from a two-dimensional plane on the circuit board into the third dimension by creating a suspended ground structure that protrudes from the circuit board surface. This three-dimensional extension provides additional ground area without increasing the device's footprint, effectively resolving the contradiction between miniaturization and sufficient ground plane area.
Solution Approach 2:
The suspended ground structure is nested within the device housing space, utilizing the vertical dimension and available internal volume rather than requiring additional lateral space. This nesting approach allows the ground plane to be embedded within the device structure without increasing overall device dimensions.
2Volume of moving object
If the ground plane size is insufficient due to device miniaturization, then device compactness is improved, but antenna efficiency deteriorates
Solution Approach 1:
By extending the ground plane into the third dimension as a suspended structure, the patent provides sufficient ground area for proper antenna operation without compromising device compactness. This additional ground area improves current distribution and impedance matching, thereby maintaining high antenna efficiency in a compact device form factor.
3Reliability
If the ground plane size is increased to improve antenna performance, then antenna efficiency is improved, but the device size increases
Solution Approach 1:
The patent achieves increased ground plane area by utilizing the vertical dimension through suspended ground structures rather than expanding the horizontal footprint. This allows improved antenna performance through adequate ground area while maintaining the device's compact external dimensions.
Solution Approach 2:
The suspended ground structure utilizes thin conductive elements that extend from the circuit board, providing increased ground area with minimal volume occupation. These thin-film-like structures deliver the necessary electrical performance without adding significant bulk to the device.
4Volume of moving object
If the ground plane size is insufficient, then device compactness is maintained, but matching characteristics of the antenna deteriorate
Solution Approach 1:
The suspended ground structure extending into the third dimension provides additional ground area that improves current distribution and impedance matching characteristics. This enables better antenna matching without compromising device compactness, as the extension occurs vertically rather than laterally.
Data Source
AI summary
The disclosure provides a communication device including a ground plane, an antenna and an extended grounding structure. The ground plane has a first side and a second side opposite to each other. The antenna is disposed at the first side and has a first feeding end. The extended grounding structure is disposed at the second side and includes a connection portion and a symmetrical structure. The symmetrical structure is electrically connected to the ground plane via the connection portion, wherein the symmetrical structure is symmetrical along a symmetry axis, and an extension line of the symmetry axis passes through the first side and the second side. The disclosure can effectively prevent antenna efficiency from being degraded due to an insufficient size of the ground plane, so as to significantly enhance communication quality.