Millimeter-wave PA Network with Reflective Walls
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Solution Overview
Problem
Conventional wireless networks using microwave frequencies face limitations in throughput due to low directivity antennas, making real-time video streaming applications like HDTV difficult, and millimeter-wave frequencies struggle with non-line of sight communications and multipath components in indoor environments.
Innovation Solution
The implementation of a millimeter-wave personal area network with directional antennas and a reflector, such as a metallic or dielectric reflector, positioned on walls or ceilings to direct and reflect millimeter-wave signals, reducing multipath components and obstacles, and using absorptive elements to create an ideal communication channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If millimeter-wave frequencies are used for indoor networking, then throughput is increased, but non-line of sight communications become difficult
Solution Approach 1:
The patent introduces a reflector as an intermediary object to enable millimeter-wave communication around obstacles. The reflector is positioned to receive direct line-of-sight signals from the base station and redirect them to mobile stations that are not in direct line of sight, thus solving the non-line-of-sight communication problem while maintaining high throughput
2Productivity
If millimeter-wave frequencies are used for indoor networking, then throughput is increased, but multipath components increase making signal processing difficult
Solution Approach 1:
The patent creates a localized controlled environment by positioning absorptive materials at specific locations around the mobile station. These absorbers are strategically placed to target and eliminate multipath reflections from specific surfaces (walls, ceilings, floors) while leaving the direct line-of-sight path unaffected, thus reducing multipath interference without compromising throughput
3Productivity
If directional antennas are used at millimeter-wave frequencies, then throughput is increased, but device complexity increases
Solution Approach 1:
The patent utilizes the spatial dimension by introducing a reflector positioned in the vertical dimension (typically on the ceiling or wall). This allows the system to achieve directional communication benefits while using simpler omnidirectional or low-directivity antennas, as the reflector provides the necessary signal directioning through geometric reflection rather than complex antenna structures
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 throughput and simplifies signal demodulation, enabling effective real-time video streaming by reducing multipath interference and obstacles, thus improving communication efficiency in indoor wireless networks.
Implementation Method 1
a reflector, such as a metallic or dielectric reflector, positioned on walls or ceilings to direct and reflect millimeter-wave signals
Implementation Method 2
using absorptive elements to create an ideal communication channel
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Embodiments of an indoor millimeter-wave wireless personal area network and method are described. In some embodiments, a directional antenna (103) and a diffusive reflector (106) are used to increase throughput and reduce multipath components.