X-Shaped Multi-Band Antenna Structure for Omnidirectional WiFi 6E/7
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Solution Overview
Problem
Existing wireless equipment faces challenges in supporting multiple frequency bands (2.4 GHz, 5 GHz, and 6 GHz) while maintaining compact size and cost-effectiveness, as traditional single-band antennas struggle to adapt to evolving WiFi technologies like WiFi 6E and WiFi 7.
Innovation Solution
A horizontally polarized omnidirectional multi-band antenna structure with structurally-symmetric X-shaped radiators and multiple stubs is designed to support multiple frequency bands, including 2.4 GHz, 5 GHz, and 6 GHz, while maintaining a compact size and reducing the number of required antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used to support different frequency bands, then band coverage is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a single antenna structure that can operate across multiple frequency bands (2.4 GHz, 5 GHz, and 6 GHz) by incorporating multiple resonant elements with different lengths and configurations. The antenna includes a first resonant element for 2.4 GHz band, a second resonant element for 5 GHz band, and a third resonant element for 6 GHz band, all integrated into one unified structure that provides universal multi-band functionality without requiring separate antennas for each band
Solution Approach 2:
The patent merges multiple antenna functions into a single integrated antenna structure. Instead of using separate antennas for 2.4 GHz, 5 GHz, and 6 GHz bands, the design combines all resonant elements, feed networks, and radiating structures into one unified antenna assembly that simultaneously supports all three frequency bands, thereby reducing overall device complexity and component count
2Reliability
If antenna size is increased to match lower frequency wavelengths, then low frequency performance is improved, but overall device size increases
Solution Approach 1:
The patent employs a nested configuration where resonant elements of different sizes are arranged concentrically or in overlapping patterns. The first resonant element (largest for 2.4 GHz) is positioned to accommodate the second resonant element (medium size for 5 GHz), which in turn accommodates the third resonant element (smallest for 6 GHz). This nesting allows multiple wavelength-scale elements to coexist within a compact overall footprint, maintaining low frequency performance without proportionally increasing total antenna size
Solution Approach 2:
The patent utilizes vertical stacking and three-dimensional spatial arrangement to accommodate resonant elements of different wavelengths. Instead of arranging all elements in a single plane which would require large area, the design employs multiple layers and vertical positioning to pack the first, second, and third resonant elements into a compact volume, effectively transitioning from two-dimensional to three-dimensional space utilization
3Adaptability or versatility
If multiple antennas are used for multi-band support, then frequency band coverage is improved, but equipment cost increases
Solution Approach 1:
The patent implements a single antenna structure that can operate across multiple frequency bands (2.4 GHz, 5 GHz, and 6 GHz) by incorporating multiple resonant elements with different lengths and configurations. The antenna includes a first resonant element for 2.4 GHz band, a second resonant element for 5 GHz band, and a third resonant element for 6 GHz band, all integrated into one unified structure that provides universal multi-band functionality without requiring separate antennas for each band
Solution Approach 2:
The patent merges multiple antenna functions into a single integrated antenna structure. Instead of using separate antennas for 2.4 GHz, 5 GHz, and 6 GHz bands, the design combines all resonant elements, feed networks, and radiating structures into one unified antenna assembly, thereby reducing component count, simplifying manufacturing processes, and lowering overall equipment cost
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 multi-band antenna structure achieves efficient coverage in multiple frequency bands, reducing equipment size and cost by integrating three bands into a single antenna, ensuring stable signal coverage and omnidirectional radiation patterns.
Implementation Method 1
Each being approximately X-shaped and having multiple stubs, so as to create a required resonance current path
Data Source
AI summary
A horizontally polarized omnidirectional multi-band antenna structure includes a substrate and two structurally-symmetric radiators, each being provided on a layout area on one of the two opposite sides of the substrate, and including a X-shaped primary microstrip line, four secondary microstrip lines, four primary stubs, four secondary stubs and four resonators. The primary microstrip line has four end points arranged with the secondary microstrip lines along different extending directions. The primary stubs extend along different directions from four sections of the primary microstrip line. Each secondary microstrip line is provided with one of the secondary stubs. Resonators are provided between four end points of the primary microstrip line and the primary stubs. The antenna structure supports WiFi 6E/WiFi 7 frequency bands including the 2 GHz, 5 GHz and 6 GHz bands, has characteristics of horizontal polarization and omnidirectionality, and effectively satisfies the needs for miniaturized multi-band and wide band antennas.