Metal Frame Antenna Layout for Compact Multi-Band Coverage
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Solution Overview
Problem
Current antenna structures in wireless communication devices are complex and occupy significant space, hindering miniaturization efforts due to their bulkiness and inability to efficiently support multiple frequency bands simultaneously.
Innovation Solution
The proposed antenna structure incorporates a metal frame with strategically placed slots and gaps to create radiation portions, combined with a switch circuit that adjusts frequency bands by varying the position of the ground plane and feed portions, allowing for efficient multi-frequency operation and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional antenna structures are used to support multiple frequency bands, then frequency coverage is improved, but device space occupation increases and miniaturization is hindered
Solution Approach 1:
The antenna structure is designed to perform multiple functions by supporting GPS, Wi-Fi (2.4GHz and 5GHz), and LTE frequency bands simultaneously through a single integrated antenna system, eliminating the need for separate antennas for each frequency band
Solution Approach 2:
The antenna incorporates a switch circuit that dynamically adjusts the ground plane position and feed portion configuration to adapt to different frequency bands, enabling the same physical structure to efficiently operate across multiple frequency ranges
2Volume of moving object
If antenna structure is simplified for miniaturization, then device compactness is improved, but frequency band coverage and radiation efficiency deteriorate
Solution Approach 1:
The antenna structure is divided into distinct functional segments including a frame portion, ground plane, feed portion, and switch circuit, allowing each segment to be optimized for its specific function while maintaining overall compactness
Solution Approach 2:
The antenna employs a nested configuration where the ground plane and feed portion are positioned within the frame structure, and the switch circuit is integrated into the antenna assembly, maximizing space utilization in a compact form factor
3Adaptability or versatility
If multiple separate antennas are used for different frequency bands, then frequency coverage is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent merges GPS, Wi-Fi, and LTE antenna functions into a single integrated antenna structure with a common ground plane and feed system, reducing the number of separate antenna components while maintaining support for all required frequency bands
Solution Approach 2:
The single antenna structure is designed to universally support multiple frequency bands through the switch circuit that reconfigures the ground plane and feed portion, eliminating the need for multiple dedicated antennas for different services
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 solution enables the antenna to effectively cover a wide range of frequency bands, including GPS, Wi-Fi, and LTE, while maintaining a compact form factor, enhancing bandwidth and radiation efficiency, and supporting carrier aggregation applications.
Implementation Method 1
Antennas are for receiving and transmitting wireless signals at different frequencies
Data Source
AI summary
An antenna structure applied in a wireless communication device includes a metal frame, a first feed portion, a second feed portion, and a ground portion. The metal frame defines a first gap and a second gap. A portion of the metal frame positioned between the first gap and the second gap forms the first radiation portion. The first feed portion is electrically connected to the first radiation portion and a first signal feed point for feeding current and signals to the first radiation portion. The second feed portion is positioned apart from the first feed portion, electrically connected to the first radiation portion and a second signal feed point for feeding current and signal to the first radiation portion. The ground portion is positioned between the first feed portion and the second feed portion and is connected to the first radiation portion for grounding the first radiation portion.