RFID-Controlled Reflect Array for Low-Power Beam Steering
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Solution Overview
Problem
Wireless communication systems face challenges due to unpredictable radio channels that distort and obscure data signals, leading to dropped calls or reduced data rates, especially when high-power wide-band signals are not feasible, and existing methods like beamforming and pre-distortion fail.
Innovation Solution
An Intelligent Reflect Array (IRA) with an array of patch antennas and controllable delay elements, controlled by a switch and a controller, manipulates radio frequency signals to shape and direct them through the radio channel, reducing interference and maintaining signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If high power wide band data signals are used, then penetration and range are improved, but power consumption and system complexity increase
Solution Approach 1:
The patent introduces an Intelligent Reflect Array as an intermediary device between the transmitter and receiver. This array reflects and shapes radio frequency signals to improve propagation through the radio channel, enabling extended range communication without requiring high power transmission. The reflective surface acts as a mediator that manipulates signal paths to overcome channel losses.
2Reliability
If beamforming and pre-distortion methods are employed, then signal quality through the radio channel is improved, but device complexity and computational requirements increase
Solution Approach 1:
The patent replaces complex electronic beamforming systems with a reflective array structure that achieves signal shaping through physical reflection principles. Instead of using sophisticated transmission schemes with multiple active elements and complex control, the system uses a passive reflective surface that manipulates radio waves through geometric reflection, significantly reducing device complexity while maintaining signal quality.
3Length of stationary object
If repeaters are used to extend signal range, then communication range is improved, but signal delay increases and security is compromised
Solution Approach 1:
The patent converts the typically harmful effect of radio frequency reflection off environmental objects into a beneficial controlled reflection mechanism. By intentionally designing a reflective array with specific geometric properties, the system uses reflection - normally an uncontrolled source of interference - to actively shape and direct signals, extending range without the delay and security issues associated with repeaters that demodulate and retransmit signals.
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 IRA enhances communication by improving signal reception, extending range, and managing beamforming without adding delay or power, while being resistant to interception and demodulation.
Implementation Method 1
The IRA has an array of independently controllable surfaces that may be used to apply effects to the radio frequency signals (e.g., reflection, refraction, absorption, focusing and polarization)
Implementation Method 2
Each position is configured to connect one delay element of a respective plurality of delay elements to a respective patch antenna
Data Source
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AI summary
Embodiments of a method and apparatus for an intelligent reflect array are disclosed. In an example, an antenna array includes an array of patch antennas, a plurality of delay elements associated with each patch antenna, and a switch for each patch antenna having multiple positions. Each position is configured to connect one delay element of a respective plurality of delay elements to a respective patch antenna. A controller controls the position of each switch.