Cavity Antenna Structure for Dual-Beam Indoor Room Coverage
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Solution Overview
Problem
In high-density indoor environments, omnidirectional antennas deployed to convert wired networks to wireless networks face significant signal attenuation due to walls, necessitating multiple access points to ensure adequate wireless signal strength in each room, leading to a large number of access points being deployed.
Innovation Solution
An antenna design featuring a first conductor sheet with cavities connected through a gap, where the circumference of the cavities approximates the operating frequency band's wavelength, generating standing wave currents and dual beams, allowing for strong wireless signal coverage in two directions without the need for access points in every room, thereby reducing the number of access points required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If omnidirectional antennas are deployed to provide wireless coverage in high-density indoor environments, then wireless signal strength can be maintained in each room, but a large quantity of access points need to be deployed
Solution Approach 1:
The antenna structure is segmented into multiple cavities (first cavity, second cavity, third cavity, fourth cavity) arranged in a specific configuration. Each cavity acts as an independent radiating element, and their combined operation creates directional beam formation. This segmentation allows the single antenna to provide focused coverage in multiple directions, replacing the need for multiple omnidirectional access points.
Solution Approach 2:
The patent implements local quality by creating specific directional beams rather than omnidirectional radiation. The cavity structure and feed point configuration generate concentrated wireless signals in particular directions (dual beams or quadruple beams), providing localized high-strength coverage where needed rather than uniform coverage in all directions. This allows strategic coverage of adjacent rooms through focused beam transmission.
2Reliability
If multiple access points are deployed to ensure adequate wireless signal strength in each room, then wireless coverage is improved, but device complexity and deployment cost increase
Solution Approach 1:
The antenna structure performs multiple functions within a single device. It can operate in different modes (dual beam or quadruple beam configuration) depending on the deployment scenario. The same basic cavity structure can be configured to provide either two or four directional beams, making it a universal solution for various high-density indoor environments without requiring different antenna types for different scenarios.
Solution Approach 2:
The patent merges multiple antenna functions into a single integrated structure. Instead of deploying separate access points in each room, the combined cavity structure consolidates the functionality of multiple omnidirectional antennas into one device that provides equivalent or superior coverage through directional beam formation, simplifying deployment and reducing infrastructure complexity.
3Area of stationary object
If omnidirectional antennas are used to transmit wireless signals, then coverage area is maximized, but signal strength is greatly attenuated by walls partitioning rooms
Solution Approach 1:
The antenna creates concentrated directional beams rather than dispersed omnidirectional radiation. By focusing energy into specific directions (dual or quadruple beams), the signal strength in those directions is significantly enhanced, allowing walls to be penetrated more effectively. The local quality principle ensures that high signal strength is delivered precisely where needed (adjacent rooms) rather than uniformly distributed.
Solution Approach 2:
The patent transitions from two-dimensional omnidirectional coverage to three-dimensional directional beam formation. The cavity structure creates spatially selective radiation patterns, adding a dimensional aspect to signal transmission by forming specific beam directions in three-dimensional space. This allows the signal to propagate more effectively through walls in targeted directions while maintaining coverage area.
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 design effectively reduces the number of access points needed by generating concentrated dual beams that cover adjacent rooms, improving beam gain and allowing for more flexible deployment scenarios while maintaining a simple and compact structure.
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
Implementation Method 2
When the circumference of the cavity approaches the wavelength corresponding to the operating frequency band of the antenna, the feed point may generate a standing wave current
Implementation Method 3
after the antenna is powered on at the feed point, zero points may be formed at two ends of the first conductor sheet in a direction along the gap, to construct dual beams
Data Source
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.