OAM Antenna Array Phase Control for Multi-Directional Links
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Solution Overview
Problem
Existing electromagnetic wave transmitting/receiving devices, particularly those using uniform circular arrays or loop antenna arrays, are limited in their ability to transmit and receive OAM radio waves in multiple directions simultaneously.
Innovation Solution
A transmitting/receiving device with a plurality of antennas, phase shifters, a phase shift controller, and an antenna selector, configured as a virtual regular polyhedron, such as an icosahedron, allows for simultaneous transmission and reception of OAM radio waves in multiple directions by controlling the phase and orientation of the antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If directional antennas are used for data relay satellites, then OAM radio waves can be transmitted in a specific direction, but mechanical rotation is required to change transmission directions
Solution Approach 1:
The patent replaces the mechanical rotation system with an electronic phase control system. Instead of physically rotating antennas to change transmission directions, the system uses phase shifters to electronically adjust the beam direction and OAM mode by controlling the phase difference between signals at different antenna elements, achieving directional control without any moving parts
Solution Approach 2:
The system changes the electrical parameters (phase and amplitude) of signals at each antenna element to control the transmission direction and OAM mode. By adjusting the phase shift values and signal amplitudes dynamically, the system can switch between different transmission directions and modes without mechanical movement, maintaining directional accuracy through parameter control rather than physical repositioning
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
Enables the device to transmit and receive OAM radio waves in all directions without requiring mechanical rotation, enhancing the flexibility and capacity of wireless communication systems.
Implementation Method 1
a plurality of phase shifters each connected to a corresponding one of the plurality of antennas; a phase shift controller that controls phase-shifting by the plurality of phase shifters
Implementation Method 2
The phase shift controller controls the plurality of phase shifters connected to the three or more antennas selected by the antenna selector, with respect to an approximate center of the three or more antennas on the basis of directional orientations and relative positions of the three or more antennas, so that the electromagnetic waves transmitted or received from the three or more antennas become OAM radio waves
Data Source
AI summary
Provided is an electromagnetic wave transmitting/receiving device capable of transmitting OAM radio waves in at least two directions and receiving OAM radio waves arriving from at least two directions. This electromagnetic wave transmitting/receiving device includes: a plurality of antennas; a plurality of phase shifters each connected to a corresponding one of the antennas; a phase shift controller that controls phase-shifting by the phase shifters; and an antenna selector that selects an antenna to be used for transmitting or receiving electromagnetic waves from among the plurality of antennas. The antenna selector selects three or more antennas oriented in at least two different directions from among the plurality of antennas in accordance with directions in which the electromagnetic waves are transmitted or received. The phase shift controller identifies phases of the phase shifters connected to the three or more antennas selected by the antenna selector, with respect to an approximate center of the three or more antennas on the basis of the directional orientations and relative positions of the three or more antennas, and controls the phase shifters.