Adaptable Van Atta Reflector Array for NLOS Coverage Steering
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Solution Overview
Problem
In urban or undulating terrain environments, there are localized areas shadowed by obstacles to radio frequency propagation where no wireless coverage exists, particularly for high frequency bands like mmWave frequencies, and RF repeaters are not viable due to deployment and operating costs, as well as a lack of connectivity for remote management.
Innovation Solution
An adaptable Van Atta reflective array (A-VARA) system with variable phase shifters in transmission lines linking radiating elements is used to steer reflected coverage around obstacles, utilizing a control for aggregate adjustment to modify the reflection direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RF repeaters are deployed to provide coverage in shadowed areas, then wireless coverage is improved, but deployment cost and operating cost increase significantly
Solution Approach 1:
The patent replaces expensive, active RF repeater systems with inexpensive, passive reflector panels that have no moving parts, no power requirements, and minimal maintenance needs. The reflector panels are deployed as simple structural elements rather than complex electronic systems, dramatically reducing deployment and operating costs while providing reliable coverage in shadowed areas.
Solution Approach 2:
The reflector panels are self-contained passive structures that require no external power source, no active electronics, and no remote management connectivity. They automatically reflect and steer RF signals around obstacles without requiring operational intervention, maintenance, or monitoring infrastructure, eliminating ongoing operating costs associated with traditional repeaters.
2Reliability
If RF repeaters are deployed to extend coverage, then connectivity is improved, but remote management capability deteriorates due to lack of connectivity
Solution Approach 1:
The passive reflector panels require no remote management, monitoring, or control infrastructure. They are self-contained structures that automatically perform their signal reflection function without needing connectivity to network management systems, eliminating the remote management challenges associated with deployed repeaters.
3Area of stationary object
If traditional reflector panels are used, then coverage extension is achieved, but adaptability to different reflection directions deteriorates
Solution Approach 1:
The patent incorporates variable phase shifters into the transmission lines linking radiating elements, enabling dynamic electronic control of the reflected beam direction. This allows the reflector panel to adapt and steer coverage to different areas as needed, providing both extended coverage and directional flexibility that traditional static reflectors cannot achieve.
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 A-VARA system provides reliable, cost-effective, and maintenance-free wireless coverage by reflecting signals around obstacles, enhancing connectivity in challenging environments without the need for electrical power or active electronics.
Implementation Method 1
A-VARA system provides reliable, cost-effective, and maintenance-free wireless coverage by reflecting signals around obstacles
Implementation Method 2
The A-VARA panel comprises variable phase shifters incorporated into transmission lines linking a set of radiating elements
Data Source
AI summary
Aspects provided herein provide methods and systems for utilizing an adaptable Van Atta reflective array (A-VARA) system. The system comprises an A-VARA panel comprising variable phase shifters incorporated into transmission lines linking a set of radiating elements. The system also comprises a control that modifies a reflection direction of the A-VARA panel and provides aggregate adjustment to each of the variable phase shifters to steer reflected coverage around an obstacle.