Grounded Self-Complementary Antenna for Broadband Wireless
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Solution Overview
Problem
Existing built-in antennas in electronic devices, such as notebook computers, suffer from low electromagnetic signal transmission efficiency and narrow bandwidth, limiting their radio communication capabilities.
Innovation Solution
A grounded self-complementary antenna design is introduced, featuring a metal radiator and a complementary element with an open zone, where the shapes are symmetrical to form a self-complementary antenna, and the complementary element is electrically connected to the device's grounding element to enhance radiation efficiency and bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-element antenna is used in electronic devices, then the device complexity is reduced, but the electromagnetic signal transmission efficiency deteriorates
Solution Approach 1:
The antenna is divided into two complementary metal sheets with symmetrical geometric shapes. Each sheet acts as a separate radiating element, and together they form a self-complementary structure that improves signal transmission efficiency while maintaining manageable complexity through modular design
Solution Approach 2:
The two metal sheets are combined on a single substrate to form a self-complementary antenna structure. This merging of complementary elements creates enhanced radiation efficiency and broader bandwidth compared to single-element antennas, while integrating both elements into one unified antenna system
2Ease of manufacture
If a single-element antenna is used in electronic devices, then the manufacturing process is simplified, but the electromagnetic signal bandwidth deteriorates
Solution Approach 1:
The antenna structure is segmented into two complementary metal sheets that can be independently designed and manufactured on the substrate. This segmentation allows for easier fabrication using standard PCB techniques while the complementary pairing provides enhanced bandwidth characteristics
Solution Approach 2:
The antenna uses composite structure combining two different metal sheet geometries that are complementary to each other. This composite approach broadens the operational bandwidth by utilizing the complementary characteristics of both metal sheets across different frequency ranges
3Area of stationary object
If the ground area of the antenna is limited by device constraints, then the device size is reduced, but the radiation efficiency deteriorates
Solution Approach 1:
The grounding structure uses an asymmetric complementary metal sheet design where one sheet serves as the primary radiating element and the other as the grounding element. This asymmetric complementary configuration optimizes radiation efficiency within limited ground area by creating effective current paths without requiring large physical dimensions
Solution Approach 2:
The antenna design transitions from requiring large planar ground area to achieving efficient radiation through vertical current distribution and complementary geometry in the planar dimension. The self-complementary structure creates effective radiation patterns that compensate for limited ground area constraints
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 significantly improves radiation efficiency and broadens the signal transmission bandwidth, enhancing the overall radio signal transmission effect in electronic devices.
Implementation Method 1
a metal radiator 11 and a metal complementary element 12 adjacent thereto... The metal complementary element 12 and the a metal grounding element 21 of the electronic device are electrically connected to each other
Implementation Method 2
capable of elevating the electromagnetic signal transmission efficiency of the electronic device... enable the self-complementary antenna to obtain the good radiation efficiency
Data Source
AI summary
A metal complementary element of a grounded self-complementary antenna for an electronic device and a metal grounding element of the electronic device contact with each other, are electrically connected to each other or are a same article so as to substantially enlarge an area of a grounding end of the self-complementary antenna to enable the self-complementary antenna to have the good radiation efficiency and the broader bandwidth such that the radio signal transmission effect of the electronic device can be elevated.