Window-Mounted RF Antenna Unit for Millimeter Wave Signal Transmission
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Solution Overview
Problem
Next-generation wireless systems, such as 5G, face challenges with limited building penetration of millimeter wave frequencies and the need for increased cell site density due to higher bandwidth requirements, which is hindered by metallic window coatings that attenuate radio frequency signals, necessitating disruptive and costly installation methods.
Innovation Solution
A window-mounted RF antenna assembly with an outdoor unit attached to the exterior and an indoor unit on the interior of a building window, using a phased array antenna to transmit and receive RF signals, converting them to optical signals for indoor processing, and incorporating wireless power transfer, allowing for easy installation without altering the building.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If millimeter wave frequencies are used for next-generation wireless systems, then bandwidth and download speeds are improved, but building penetration capability deteriorates
Solution Approach 1:
The system divides the wireless coverage area into multiple small cells (micro-cell sites) distributed across building surfaces, particularly utilizing window-mounted antenna units. This segmentation allows each local cell to operate at high millimeter wave frequencies for high bandwidth, while the distributed architecture ensures at least one cell is always near any given user, compensating for limited building penetration.
2Productivity
If cell site density is increased to support higher bandwidth requirements, then wireless capacity is improved, but installation complexity and cost increase due to metallic window coatings
Solution Approach 1:
The window-mounted antenna unit serves multiple functions: it acts as a micro-cell site for wireless communication, utilizes the existing window surface for mounting, and leverages the building's existing structure rather than requiring separate infrastructure. This multi-functionality enables high cell density without proportionally increasing installation complexity.
Solution Approach 2:
The system utilizes existing building infrastructure (windows and surfaces) for antenna mounting, eliminating the need for separate infrastructure construction. The window-mounted design allows the building itself to serve as the mounting structure, reducing installation complexity and cost while enabling increased cell site density.
3Reliability
If traditional installation methods are used for cell sites, then reliable mounting is achieved, but installation disruption and cost increase
Solution Approach 1:
The invention extracts the cell site mounting function from traditional complex installation processes (drilling, concrete anchoring) and relocates it to window surfaces that can be mounted using simpler methods. This separates the mounting function from the building structure itself, allowing easier installation while maintaining reliability through the window's inherent structural support.
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 enhances cell site density and signal strength, reduces the need for extensive infrastructure, and minimizes installation costs by enabling the creation of additional cell sites or extending existing ones without invasive methods.
Implementation Method 1
using a phased array antenna to transmit and receive RF signals
Implementation Method 2
converting them to optical signals for indoor processing
Implementation Method 3
incorporating wireless power transfer
Data Source
AI summary
An RF antenna system includes a first unit that further includes first attachment means that secures the first unit to a window, and an antenna. The first unit additionally includes an RF transceiver, coupled to the antenna, that receives, via the antenna, incoming RF signals and converts the RF signals to first electrical signals; and first optical means that transmits the first electrical signals as first optical signals through the first surface of the window. The RF antenna system also includes a second unit that includes second attachment means that secures the second unit to the window. The second unit also includes second optical means that receive the first optical signals through the second surface of the window, convert the first optical signals to first digital signals, and transmit the first digital signals to a device connected to the second unit.