Surface-Link Antenna Architecture for High-Rise RF Loss Reduction
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Solution Overview
Problem
Existing wireless network devices face significant RF losses due to concrete building materials, particularly at high-rise buildings, which limit throughput and often require mesh network configurations to establish links between floors, leading to lower performance and connectivity issues.
Innovation Solution
The implementation of surface-link antenna systems mounted on exterior building surfaces, which establish line-of-sight wireless links outside the building, bypassing internal floor and wall losses, and can be configured for various network topologies such as AP-STA, mesh, or hybrid configurations to enhance signal strength and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If wireless network devices use internal antennas within buildings, then device integration is simple, but RF losses are high due to concrete building materials
Solution Approach 1:
The antenna system is extracted from the interior of the building and mounted on the exterior surface. This separates the antenna from the harmful concrete building materials that cause RF losses, allowing the antenna to operate in a more favorable electromagnetic environment while reducing signal attenuation.
Solution Approach 2:
The patent introduces an external antenna system mounted on building surfaces as an intermediary between the wireless network devices inside the building and the external wireless environment. This intermediary position allows signals to bypass the lossy concrete materials while still serving interior devices.
2Reliability
If mesh network configurations are used to establish links between floors, then connectivity is achieved, but throughput performance decreases
Solution Approach 1:
The patent transitions from horizontal peer-to-peer mesh networking between devices to a vertical dimension by mounting antennas on building exteriors. This dimensional change allows direct line-of-sight paths between floors, eliminating the need for multi-hop mesh configurations and improving throughput while maintaining connectivity.
3Loss of energy
If surface-link antenna systems are mounted on exterior building surfaces, then RF losses are reduced by bypassing internal materials, but installation complexity increases
Solution Approach 1:
The antenna system is segmented into modular components that can be independently mounted on building surfaces. This segmentation allows for flexible installation on different building architectures while maintaining the performance benefits of exterior mounting, reducing the overall installation complexity.
4Device complexity
If internal antennas are used within buildings, then device integration is simple, but signal interference from building materials increases
Solution Approach 1:
The antenna is extracted from the building interior where it would be affected by concrete materials causing signal interference. By placing the antenna on the exterior surface, the harmful interaction between RF signals and building materials is eliminated, reducing interference while keeping the antenna system relatively simple.
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 solution achieves higher receive power levels and improved throughput by moving wireless links outside the building, reducing interference and enabling reliable connections across multiple floors without the limitations of internal building materials, while allowing for flexible network configurations to avoid interference issues.
Implementation Method 1
The surface-link antenna is to radiate electromagnetic energy along an exterior surface of the building
Data Source
AI summary
Technologies for wireless network devices with surface-link antenna systems mounted on exterior surfaces of buildings are described. One wireless network device includes a housing with a circuit board and a first antenna port. A processor, a first antenna, a first wireless local area network (WLAN) radio, and a second WLAN radio are disposed on the circuit board. The first WLAN radio communicates with a radio of a client device using the first antenna over a first line-of-sight (LOS) or non-LOS wireless link (e.g., 2.4 GHz) inside the building. The second WLAN radio communicates with a radio of a second wireless network device using the second antenna over a second LOS wireless link (e.g., 5 GHz) that is external to the building. The first antenna is located inside the building and the second antenna is located along an exterior surface of the building.