Multi-Band Antenna Structure for Wide 5G NR Band Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 5G NR antennas face challenges in achieving high operating bandwidth and isolation, requiring complex three-dimensional metal plate structures that increase form factor and cost.
Innovation Solution
An antenna structure comprising a substrate, ground plane, and antenna element with specific resonating components that generate multiple frequency bands, including a ground branch, feed-in body, and radiating parts, allowing for ultra-wide frequency operation without complex designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a general antenna design (e.g., inverted-F antenna) is used, then the structure is simple and cost is low, but the operating bandwidth is limited and cannot meet 5G NR multi-band requirements
Solution Approach 1:
The antenna element is divided into multiple radiating parts (first radiating part, second radiating part, third radiating part) with different lengths, each resonating at different frequency bands. The ground plane is also segmented into multiple ground branches with different lengths to support multiple resonant modes. This segmentation allows a single antenna structure to operate across multiple frequency bands without requiring additional antenna elements.
Solution Approach 2:
The patent transitions from a two-dimensional planar antenna design to a three-dimensional structure by adding vertical height dimension. The antenna element extends vertically with radiating parts at different heights, and the ground plane is positioned at a specific height above the substrate. This 3D configuration enables multiple resonant modes and broader frequency coverage while maintaining structural simplicity.
2Adaptability or versatility
If additional elements (e.g., three-dimensional metal plate structure) are designed to realize multi-band operation, then the frequency band coverage is improved, but the form factor and cost are greatly increased
Solution Approach 1:
The patent merges multiple functional elements into a single integrated antenna structure. The radiating parts, ground branches, and feeding network are combined into one compact antenna element that supports multiple frequency bands. This consolidation achieves multi-band operation without requiring separate antenna elements or complex 3D metal plate structures, thereby reducing overall form factor.
Solution Approach 2:
The antenna element is designed as a universal structure that can operate across multiple frequency bands (sub-6 GHz, mid-band, high-band) through its multiple radiating parts and ground branches. This multi-functional design eliminates the need for additional specialized antenna elements for different frequency ranges, reducing both volume and cost while maintaining 5G NR multi-band requirements.
3Adaptability or versatility
If additional elements are added to achieve high operating bandwidth, then the frequency coverage is improved, but the device complexity and cost increase
Solution Approach 1:
The antenna element is segmented into multiple radiating parts with progressively different lengths (first, second, and third radiating parts), each contributing to different frequency bands. The ground plane is segmented into multiple ground branches that resonate at different frequencies. This segmentation strategy achieves high operating bandwidth through resonant modes of existing segments rather than adding complex additional elements.
4Ease of manufacture
If a simple inverted-F antenna design is used, then manufacturing is easy and cost is low, but isolation between antennas and data rate are insufficient for 5G NR requirements
Solution Approach 1:
The patent introduces vertical dimension to the traditional planar inverted-F antenna by extending radiating parts vertically at different heights. This 3D configuration improves isolation between adjacent antennas in MIMO arrays and enhances radiation efficiency, thereby improving MIMO system performance while maintaining manufacturing simplicity through standard PCB fabrication 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
The antenna structure achieves wide frequency band coverage and optimized radiation patterns, reducing complexity and cost while meeting 5G NR requirements.
Implementation Method 1
the ground branch resonates with the feed-in signal to generate a first frequency band
Implementation Method 2
the first radiating part and the second radiating part resonate with the feed-in signal to generate a second frequency band
Implementation Method 3
the first radiating part resonates with the feed-in signal to generate a third frequency band
Data Source
AI summary
An antenna structure, which comprises a substrate, a ground plane and an antenna element. The substrate comprises a first surface and a second surface opposite to the first surface. The ground plane comprises a ground branch. The antenna element comprises a feed-in body, a radiating body and a short circuit part. The feed-in body is configured for receiving a feed-in signal, wherein projection of a part of the feed-in body to the first surface overlaps with the ground plane. The radiating body comprises a first radiating part and a second radiating part connected to the first radiating part. The short circuit part is connected to the second radiating part, and configured for connecting the ground plane through a via hole.