RIS Reflector Layout for Efficient Radio Wave Transmission
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Solution Overview
Problem
High-frequency communication systems face challenges with heat radiation and increased complexity due to the number of communication elements and integration in 5G base stations, which hinders efficient radio wave propagation when using solid state power amplifiers and phased array antennas.
Innovation Solution
A transmission apparatus incorporating a reflector and a reconfigurable intelligent surface (RIS) unit that directs and reflects radio waves, allowing efficient propagation without the need for the antenna to face the RIS unit, thereby reducing heat radiation and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is provided to face the front of the RIS unit, then the radio wave can be emitted to the RIS unit, but a part of the reflected wave hits the antenna and propagation is hindered
Solution Approach 1:
The patent introduces a reflector as an intermediary component positioned between the antenna and the RIS unit. This adds a dimensional element to the system architecture, allowing the antenna to face away from the RIS unit while still achieving effective radio wave transmission through the reflector's redirection of the radio waves to the RIS unit.
Solution Approach 2:
The reflector serves as an intermediary component that mediates the interaction between the antenna and the RIS unit. It receives radio waves from the antenna and redirects them to the RIS unit, enabling the antenna to be positioned without facing the RIS unit directly, thus avoiding the problem of reflected waves hitting the antenna.
2Power
If solid state power amplifiers and phased array antennas are used for beamforming, then communication capability is improved, but heat radiation increases
Solution Approach 1:
The patent replaces the conventional active beamforming system (solid state power amplifiers and phased array antennas) with a passive RIS unit that reflects radio waves. This substitution eliminates the need for active electronic components that generate heat, thereby reducing heat radiation while maintaining communication capability through the reflector's passive reflection mechanism.
3Power
If more communication elements are integrated for high-frequency communication, then communication performance is improved, but the number of elements and integration complexity increase
Solution Approach 1:
The patent extracts the beamforming function from the traditional active components (amplifiers and phased array antennas) and relocates it to the passive RIS unit through reflection. This extraction reduces the number of active communication elements required in the transmitting system, thereby reducing integration complexity while maintaining high-frequency communication performance.
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 solution enables efficient propagation of reflected waves while minimizing the number of elements and integration complexity, improving communication efficiency and reducing costs by avoiding the need for additional components like waveguides.
Implementation Method 1
a reflector configured to reflect a radio wave emitted from the antenna
Implementation Method 2
a reconfigurable intelligent surface (RIS) reflecting plate configured to reflect a radio wave from the reflector and thereby transmit the reflected radio wave to a transmission target
Data Source
AI summary
A transmission apparatus according to one aspect of the present disclosure includes an antenna that emits a radio wave to space, a reflector that reflects a radio wave emitted from the antenna, and a reconfigurable intelligent surface (RIS) reflecting plate that reflects a radio wave from the reflector and thereby transmits the reflected radio wave to a transmission target.