Coupled Multi-Branch Antenna Structure for Wide 5G Bandwidth
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Solution Overview
Problem
Existing electronic devices, such as notebook computers and tablet computers, face challenges in accommodating antennas due to limited internal space, resulting in insufficient bandwidth issues for fifth-generation mobile networks (5G).
Innovation Solution
The proposed antenna structure includes a first radiating element, a second radiating element, a grounding element, a feed element, a switching circuit, and a proximity sensing circuit, arranged in a housing to optimize bandwidth and frequency offset without the need for transmission lines or impedance matching elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antenna structure is placed in existing electronic devices with limited internal space, then device compactness is improved, but bandwidth is insufficient
Solution Approach 1:
The antenna structure is divided into multiple radiating elements (first radiating element with radiating part, feed part, grounding part; second radiating element with multiple branches) that can be independently configured. Each element contributes to different frequency bands, allowing the compact antenna to achieve wide bandwidth coverage by segmenting the radiation function across multiple elements.
Solution Approach 2:
The antenna structure employs a nested configuration where the first radiating part extends between the branches of the second radiating element, creating a compact nested arrangement. The grounding element is positioned beneath the radiating elements, forming a nested multi-layer structure that maximizes space utilization within the limited internal volume while maintaining wide bandwidth.
2Device complexity
If traditional antenna structures are used in limited space, then device design is simplified, but bandwidth coverage is insufficient for 5G
Solution Approach 1:
Multiple radiating elements with different geometric configurations are merged into a single integrated antenna structure. The first radiating element (inverted-F configuration) and second radiating element (multi-branch configuration) are combined with shared grounding, creating a unified structure that supports multiple 5G frequency bands without requiring separate antennas for each band.
Solution Approach 2:
The antenna structure is designed as a universal multi-functional system where the same physical structure serves multiple frequency bands (LTE Band 71, Band 5, and 5G bands). The switching circuit enables the antenna to dynamically switch between different operational modes and frequency ranges, making it adaptable to various 5G applications without requiring device-specific customization.
3Volume of moving object
If antenna elements are closely arranged to save space, then device compactness is improved, but signal interference increases
Solution Approach 1:
The antenna structure implements local quality differentiation by assigning specific geometric characteristics to different radiating elements. The first radiating element has a specific feed part and grounding part configuration, while the second radiating element has distinct branch arrangements. Each element's local geometry is optimized for its specific frequency range, reducing mutual interference while maintaining compact overall dimensions.
Solution Approach 2:
The switching circuit and proximity sensing circuit serve as intermediary components that manage signal routing and detect environmental conditions. The proximity sensing circuit specifically acts as an intermediary to detect objects near the antenna and adjust operation accordingly, preventing signal interference caused by proximity effects while allowing compact antenna placement.
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
The antenna structure achieves a 25% increase in bandwidth in LTE Band 71 and LTE Band 5 compared to existing structures, along with a 20 MHz increase in frequency offset, while also improving antenna efficiency and allowing for proximity sensing functionality.
Implementation Method 1
The first radiating part extends between the first branch and the second branch, so that the first radiating part and the second radiating element couple with each other
Data Source
AI summary
An electronic device and an antenna structure are provided. The electronic device includes a housing and an antenna structure which includes a first radiating element with a first radiating part, a feed part, and a grounding part, a second radiating element with five branches, a grounding element connected to the grounding part, a feed element connected to the feed part, a switching circuit electrically connected to the third branch, and a proximity sensing circuit electrically connected to the fourth branch. The first branch and the second branch intersect at a first branching point, the third branch and the fourth branch intersect at a second branching point. The fifth branch is connected between the first branching point and the second branching point. The first radiating part extends between the first branch and the second branch so the first radiating part and the second radiating element couple with each other.