Electromagnetic Polarizer Layout for Antenna Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing antenna systems face interference issues due to unattenuated radio-frequency signals transmitted by one antenna disrupting the reception and conversion of signals by neighboring antennas operating at similar frequencies, which affects the quality of radio-frequency communications.
Innovation Solution
The implementation of a system comprising a first and second antenna, with a first and second electromagnetic polarizer disposed between them, and a conductive ground plane, where the polarizers change the polarization of the radio-frequency signals by specific angles to attenuate the signals, thereby reducing interference. The first electromagnetic polarizer changes the polarization of the signal from the first antenna to a second polarization offset by a first predetermined angle, and the second polarizer further changes it to a third polarization offset by a second predetermined angle, maintaining a horizontal component across a gap in the conductive ground plane, effectively attenuating the signal by approximately 20 decibels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If absorbing materials or conducting structures are used between neighboring antennas to achieve better inter-antenna isolation, then signal interference is reduced, but the radiation patterns are disrupted and signal strength is reduced
Solution Approach 1:
The patent changes the polarization parameter of the electromagnetic waves by using polarizing structures that rotate the polarization angle by 90 degrees. This allows the transmitted signal to be orthogonal to the receiving antenna's polarization, achieving isolation without physical barriers that would block or absorb the signals.
Solution Approach 2:
The patent replaces mechanical/physical barriers (absorbing materials or conducting structures) with an electromagnetic field-based solution (polarizing structures). Instead of blocking signals physically, the system uses polarization rotation to achieve isolation, substituting a mechanical approach with an electromagnetic field manipulation approach.
2Object-affected harmful factors
If barriers are placed between antennas to reduce interference, then signal isolation is improved, but the barriers either reduce signal strengths or shift radiation patterns
Solution Approach 1:
The patent changes the polarization parameter of the electromagnetic waves by using polarizing structures that rotate the polarization angle by 90 degrees. This allows the transmitted signal to be orthogonal to the receiving antenna's polarization, achieving isolation without physical barriers that would block or absorb the signals.
3Object-affected harmful factors
If physical barriers are used to achieve antenna isolation, then interference is reduced, but the system complexity and space requirements increase
Solution Approach 1:
The patent replaces mechanical/physical barriers (absorbing materials or conducting structures) with an electromagnetic field-based solution (polarizing structures). Instead of blocking signals physically, the system uses polarization rotation to achieve isolation, substituting a mechanical approach with an electromagnetic field manipulation approach.
Solution Approach 2:
The patent changes the polarization parameter of the electromagnetic waves by using polarizing structures that rotate the polarization angle by 90 degrees. This allows the transmitted signal to be orthogonal to the receiving antenna's polarization, achieving isolation without physical barriers that would block or absorb the 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
This configuration significantly increases electromagnetic isolation between antennas, ensuring that the radio-frequency signals are not disruptive, allowing for proper conversion and reception of signals, thereby enhancing the reliability of communications, such as vehicle-to-vehicle and Wi-Fi signals, by attenuating the interfering signals by at least 20 decibels.
Implementation Method 1
The first electromagnetic polarizer is disposed between the first antenna and the second antenna and operational change the first polarization of the first radio-frequency signal to a second polarization. The second electromagnetic polarizer is disposed between the first electromagnetic polarizer and the second antenna and operational change the second polarization of the first radio-frequency signal to a third polarization.
Implementation Method 2
The first electromagnetic polarizer and the second electromagnetic polarizer attenuate the first radio-frequency signal at the second antenna so that the second radio-frequency signal is convertible to the useable form.
Data Source
AI summary
An antenna system includes a first antenna operational to transmit a first radio-frequency signal, a second antenna operational to receive a second radio-frequency signal and receive the first radio-frequency signal, a first electromagnetic polarizer disposed between the first antenna and the second antenna and operational to change a polarization of the first radio-frequency signal, a second electromagnetic polarizer disposed between the first electromagnetic polarizer and the second antenna and operational to further change the polarization of the first radio-frequency signal, and a conductive ground plane disposed on a ground side of the first antenna and the second antenna. The conductive ground plane defines a gap between the first antenna and the second antenna. The gap extends under the first electromagnetic polarizer. The gap extends under the second electromagnetic polarizer. A horizontal component of the second polarization of the first radio-frequency signal is maintained across the gap.