Movable Reflective Surface Modulation for Fast mmWave Beam Alignment
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Solution Overview
Problem
Current techniques for beam alignment in antennas using electromagnetic waves are inefficient, particularly in high-frequency millimeter wave ranges, as they require lengthy protocol-level control and are not suitable for dynamic scenarios like moving objects, leading to significant beam setup overhead.
Innovation Solution
An apparatus with a movable reflective surface and an actuator, such as a piezoelectric element, is used to mechanically modulate electromagnetic waves, allowing for efficient beam alignment by altering the reflective surface's movement in response to control signals, enabling rapid and precise beam setup without requiring MAC layer communication overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If protocol-level control is used for beam alignment, then beam alignment can be achieved, but beam setup time is excessively long and overhead is significant
Solution Approach 1:
The patent replaces protocol-level control (electrical/software-based) with a mechanical oscillation system. The reflective surface is physically oscillated using actuators to modulate the reflected electromagnetic waves, enabling the transmitting device to detect beam alignment through the mechanical movement pattern rather than through lengthy protocol exchanges.
Solution Approach 2:
The reflective surface undergoes periodic oscillation at specific frequencies to modulate the reflected electromagnetic waves. This periodic mechanical action creates detectable patterns in the reflected signals, allowing for rapid beam alignment detection without requiring multiple protocol-level communication steps.
2Measurement precision
If protocol-level control is used for beam alignment, then beam alignment can be achieved, but device complexity and communication overhead increase
Solution Approach 1:
The patent substitutes complex communication protocols with a simple mechanical oscillation mechanism. The aligning device simply oscillates the reflective surface according to a predetermined pattern, and the transmitting device detects the pattern in reflected waves to determine beam alignment, eliminating the need for complex MAC layer communication protocols.
Solution Approach 2:
The oscillating reflective surface itself carries the alignment information through its mechanical movement pattern. The modulation of reflected electromagnetic waves by the oscillating surface enables the transmitting device to directly detect alignment status without requiring separate control signaling or protocol exchanges.
3Measurement precision
If traditional beam alignment methods are used, then beam alignment can be achieved, but the method is not suitable for dynamic scenarios with moving objects
Solution Approach 1:
The patent introduces dynamic oscillation of the reflective surface that can be rapidly adjusted. The oscillation frequency, amplitude, and pattern can be changed in real-time to adapt to moving objects, enabling the system to track and maintain beam alignment with dynamic targets unlike static traditional methods.
Solution Approach 2:
The periodic oscillation creates a time-varying reflection pattern that can be detected even when objects are moving. The continuous oscillatory motion allows the system to maintain alignment detection capability in dynamic scenarios by constantly sampling the reflected wave patterns.
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 significantly reduces beam setup time by an order of magnitude, enabling efficient and precise beam management in millimeter-wave systems, especially in dynamic environments, and supports energy-efficient operation using compact smart materials.
Implementation Method 1
at least one actuator, such as a piezoelectric element
Implementation Method 2
at least one movable reflective surface configured to reflect electromagnetic waves
Data Source
AI summary
Apparatus comprising at least one movable reflective surface configured to reflect electromagnetic waves and at least one actuator coupled with the at least one movable reflective surface, wherein said at least one actuator is configured to at least temporarily drive a movement of said at least one reflective surface.