Dual-Polarized Antenna Array for Wide Beam-Width
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Solution Overview
Problem
Designing an antenna system with wide beam-width and high gain for indoor wireless access points is challenging due to signal reflection and multipath fading, especially in limited spaces where multi-polarized antennas with diverse transmission directions are required.
Innovation Solution
The antenna system incorporates a first antenna group with a dielectric substrate, metal radiation and feeding elements, and a ground plane, arranged to support dual-polarized signal transmission through in-phase feeding mechanisms, allowing for both horizontal and vertical polarization, and featuring a 6×4 antenna array configuration for enhanced beam-width and gain without using expensive phase shifters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a multi-polarized antenna system is designed to cover diverse transmission directions in limited indoor space, then the beam-width and gain can be improved, but the device complexity and manufacturing cost increase due to requirements for phase shifters and multiple antenna elements
Solution Approach 1:
The antenna system is divided into multiple independent antenna groups (first antenna group with first antenna array, second antenna group with second antenna array, etc.), where each group can be independently designed and manufactured. Each antenna array within a group consists of multiple radiation elements that can be independently configured, allowing the system to achieve wide beam-width through spatial distribution without requiring complex integrated phase shifting mechanisms.
Solution Approach 2:
Each antenna group is designed to support both horizontal and vertical polarization simultaneously through its radiation elements, making each antenna group multi-functional. This universal design allows a single antenna group to handle multiple polarization directions without requiring separate dedicated antennas for each polarization, thereby reducing overall system complexity while maintaining wide beam-width coverage.
2Power
If phase shifters are used to achieve high gain and wide beam-width in multi-polarized antennas, then the antenna performance is improved, but the manufacturing cost increases significantly
Solution Approach 1:
The antenna system achieves phase control and beamforming through the geometric arrangement and intrinsic electrical characteristics of the radiation elements themselves, rather than requiring external phase shifter components. The separation distance and positioning of radiation elements within each antenna array naturally create the necessary phase differences for directional transmission, allowing the antenna structure to serve its own phase control function and eliminate expensive phase shifter hardware.
Solution Approach 2:
The design replaces expensive, complex phase shifter components with simple, inexpensive radiation elements that can be manufactured using standard PCB techniques. The radiation elements are basic conductive structures that can be produced at low cost through conventional manufacturing processes, making the overall antenna system more cost-effective while maintaining high gain performance through optimized element arrangement.
3Area of moving object
If multiple radiation elements are closely arranged to achieve wide beam-width, then the beam coverage is improved, but signal interference and multipath fading increase in indoor environments
Solution Approach 1:
Different antenna groups are assigned different polarization characteristics (horizontal vs. vertical) and different spatial orientations, creating local quality differences throughout the antenna system. This spatial and polarization diversity ensures that signals transmitted in different directions and polarizations experience different propagation paths and reflection characteristics, reducing the impact of multipath fading and signal interference while maintaining wide overall beam-width coverage.
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 configuration achieves a wide beam-width of about 120 degrees and high gain of up to 16.2 dBi, effectively reducing interference and improving communication quality in indoor environments while maintaining low manufacturing costs.
Implementation Method 1
a first radiation element 130, a second radiation element 140, a third radiation element 150, and a fourth radiation element 160
Data Source
AI summary
An antenna system includes at least one antenna array. The antenna array includes a dielectric substrate, a ground plane, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a first feeding element, and a second feeding element. The second radiation element is adjacent to the first radiation element. The first radiation element is positioned between the second radiation element and the ground plane. The fourth radiation element is adjacent to the third radiation element. The third radiation element is positioned between the fourth radiation element and the ground plane. The first feeding element is coupled to a first connection point on the first radiation element and a second connection point on the third radiation element. The second feeding element is coupled to a third connection point on the first radiation element and a fourth connection point on the third radiation element.