HVAC Duct Waveguide Antenna Distribution
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Solution Overview
Problem
The challenge in distributing wireless broadband signals within a building is the difficulty in obtaining a strong communication channel due to signal attenuation and reflection by walls, floors, and ceilings, which existing solutions like duplicate WAPs and wireless range extenders cannot fully address, especially when using building ventilation systems as waveguides for signal distribution.
Innovation Solution
The method involves using multiple base antennas inserted into HVAC ducts, optimizing configuration parameters such as antenna location, orientation, and signal attributes to enhance the propagation of wireless broadband signals, leveraging the ducts as hollow waveguides to improve signal distribution and de-correlation between signal paths, thereby increasing the reliability and range of wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single wireless access point is used, then device complexity is reduced, but signal strength and reliability deteriorate due to attenuation by walls and ceilings
Solution Approach 1:
The patent segments the wireless communication function by deploying multiple access points throughout the building. Each access point serves a specific zone, ensuring that at least one AP is always within reliable communication range of any wireless device, thereby maintaining signal strength without requiring a single complex centralized system
Solution Approach 2:
The patent transitions from horizontal wall-mounted access points to vertical integration within HVAC ducts. This dimensional change allows access points to be positioned in three-dimensional space throughout the building volume, enabling signals to propagate through air-filled ducts that bypass traditional building barriers like walls and ceilings
2Reliability
If duplicate wireless access points are distributed throughout the building, then signal reliability improves, but device complexity and installation cost increase
Solution Approach 1:
The patent makes the HVAC duct system multi-functional by integrating wireless signal distribution into the existing ventilation infrastructure. The ducts serve both their original purpose of air circulation and the new function of housing wireless access points and propagating electromagnetic signals, thereby reducing the need for separate wireless infrastructure
Solution Approach 2:
The patent leverages the existing HVAC duct infrastructure to automatically provide wireless signal distribution. The building's own ventilation system serves the dual purpose of air flow and signal propagation, eliminating the need for additional dedicated wiring or mounting structures that would otherwise be required
3Ease of operation
If wireless signals are transmitted through traditional air paths, then installation simplicity is maintained, but signal attenuation by building structures increases
Solution Approach 1:
The patent introduces the air-filled HVAC ducts as an intermediary medium for signal propagation. Instead of signals directly penetrating through attenuating building structures, the ducts serve as a protected pathway that guides electromagnetic waves from the access point to various building zones, reducing exposure to signal-degrading environments
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 approach effectively enhances the distribution and optimization of wireless broadband signals within a building by optimizing propagation modes and de-correlation between antennas, improving connectivity and signal strength across larger distances and through complex duct systems, overcoming the limitations of traditional wireless systems.
Implementation Method 1
using the building HVAC ducts as a waveguide system
Data Source
AI summary
The disclosed embodiments include methods and systems for distributing a broadband wireless signal in a building. The disclosed methods and systems feature a wireless broadband transmitter associated with multiple base antennas, where the base antennas are inserted into one or more ducts of the ventilation system of the building. Communication between the transmitter and receivers within the building may be optimized by selecting, modifying or controlling a configuration parameter of at least one of the multiple base antennas to enhance distribution of the wireless broadband signal within the ducts of the ventilation system and between the transmitter and device receivers.