Transparent Frequency Selection Surface for 5G Obstacle Diffraction
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Solution Overview
Problem
5G communication services face challenges in maintaining high communication quality due to signal diffraction issues caused by obstacles, such as the user's body, especially in high-frequency environments where signals have low diffraction and are prone to interference.
Innovation Solution
A frequency selection surface (FSS) is integrated with a transparent substrate and conductive patterns on a communication device, which diffracts RF signals to overcome obstacles, ensuring signal propagation and maintaining communication quality by resonating with the signal and acting as a new wave source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-frequency signals are used for 5G communication, then data transmission speed and capacity are improved, but signal diffraction capability deteriorates causing poor communication quality around obstacles
Solution Approach 1:
A frequency selection surface (FSS) is introduced as an intermediary component between the antenna and the surrounding environment. The FSS selectively transmits desired communication frequencies while diffracting obstacles, acting as a mediator that enables high-frequency signals to maintain both speed and reliability by managing their interaction with the environment.
Solution Approach 2:
The patent changes the physical parameters of the antenna system by integrating it with an FSS structure. This modification alters the electromagnetic field distribution and diffraction characteristics, enabling the system to maintain signal integrity at high frequencies while overcoming obstacle blockage through controlled diffraction patterns.
2Reliability
If frequency selection surface is integrated with transparent substrate, then signal diffraction and communication quality are improved, but device structure complexity increases
Solution Approach 1:
The FSS and transparent substrate are merged into a single integrated structure. The conductive patterns are directly formed on the transparent substrate, eliminating the need for separate FSS components and reducing structural complexity while maintaining the dual functionality of signal diffraction and optical transparency.
Solution Approach 2:
The transparent substrate serves multiple functions simultaneously: it provides mechanical support, enables optical transparency for display, and when equipped with conductive patterns, provides signal diffraction capabilities. This multi-functionality reduces the need for additional components and simplifies the overall device structure.
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 FSS effectively prevents communication quality deterioration by diffracting signals over obstacles, enhancing communication performance even in mmWave environments, as demonstrated by experimental results showing improved signal gain and reduced insertion loss.
Implementation Method 1
a frequency selection surface arranged adjacent to the at least one antenna and configured to diffract the signal generated from the at least one antenna
Implementation Method 2
Each of the plurality of unit cells may resonate with the signal of the at least one antenna to become a new signal source
Data Source
AI summary
A wireless communication device includes at least one antenna configured to transmit or receive a signal, and a frequency selection surface arranged adjacent to the at least one antenna and configured to diffract the signal generated from the at least one antenna, wherein the frequency selection surface includes a transparent substrate on which a plurality of unit cells are defined, and a plurality of conductive patterns arranged in the plurality of unit cells, respectively.