Dual-Beam Cavity Antenna for Adjacent Room Wi-Fi Coverage
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Solution Overview
Problem
Existing access points (APs) deployed with omnidirectional antennas in high-density rooms require multiple deployments due to signal attenuation by walls, leading to inefficiencies and increased deployment costs.
Innovation Solution
An antenna design featuring a conductor sheet with cavities connected by a gap, generating standing wave currents to form dual beams, reducing the need for multiple APs by enhancing signal coverage in adjacent rooms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If omnidirectional antennas are used in access points, then wireless signals can be transmitted in all directions, but signal strength is greatly attenuated by walls partitioning high-density rooms, requiring multiple AP deployments
Solution Approach 1:
The conductor sheet is segmented into multiple cavities (first cavity, second cavity, third cavity) that are connected through gaps. This segmentation creates multiple current paths that form dual beams with different directions, allowing the antenna to provide both omnidirectional coverage and focused signal strength through wall partitions.
Solution Approach 2:
The three cavities have different circumferences (first circumference, second circumference, third circumference) that are each approximately equal to the wavelength but differ from each other. This asymmetric design creates standing wave currents with different amplitude distributions, forming dual beams with complementary radiation patterns that overcome wall attenuation.
2Reliability
If multiple access points are deployed to cover all rooms, then signal strength requirement is met, but deployment cost and complexity increase
Solution Approach 1:
The antenna with dual beam capability performs multiple functions: it provides omnidirectional coverage like traditional antennas while simultaneously creating focused beams that penetrate wall partitions. This multi-functionality allows a single AP deployment to replace multiple APs, reducing deployment complexity while maintaining signal strength.
Solution Approach 2:
The invention transitions from traditional omnidirectional radiation in two dimensions to three-dimensional beam forming by utilizing standing wave currents in cavities of different circumferences. This creates additional radiation dimensions that enable signals to propagate through wall partitions effectively.
3Productivity
If the circumference of cavities is made approximately equal to the wavelength, then standing wave currents are generated to form dual beams, but the antenna structure becomes more complex
Solution Approach 1:
Different cavities have different local qualities (different circumferences) optimized for specific radiation directions. The first cavity, second cavity, and third cavity each contribute differently to the dual beam formation, with their specific circumferences tailored to create the desired current distribution and radiation pattern.
Solution Approach 2:
The invention utilizes parameter changes in cavity circumferences (first circumference, second circumference, third circumference) to control the standing wave current characteristics. By adjusting these parameters, the antenna achieves dual beam formation with optimized signal coverage efficiency while maintaining a relatively simple planar conductor sheet structure.
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 generates strong wireless signals in two directions, effectively covering adjacent rooms without the need for multiple AP deployments, improving signal strength and reducing deployment costs.
Implementation Method 1
the feed point may generate a standing wave current on the first conductor sheet through the gap. The standing wave current oscillates along the first conductor sheet
Data Source
Figure 1~3
Figure 4~5B
Figure 6A
AI summary
An antenna and a communication device are disclosed. The antenna may be used in an access point. The antenna specifically includes a first conductor sheet and a feed point. The first conductor sheet includes at least two cavities. The at least two cavities are connected through a gap. A circumference of each of the at least two cavities approaches a wavelength corresponding to an operating frequency band of the antenna. The feed point is connected to the gap. The antenna with a simple structure and a small size may generate two beams. Therefore, an access point disposed with the antenna may generate strong wireless signals in two directions, and the wireless signal may cover an adjacent room. In this way, there is no need to deploy an access point in each room, and a quantity of wireless access points to be deployed is reduced.