Antenna Ground Plate Reflects Electromagnetic Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aerial corona and breaker operations in electric power stations generate electromagnetic waves that can cause communication errors and destroy communication circuits in monitoring apparatuses equipped with antennas, due to high-intensity electromagnetic interference.
Innovation Solution
The monitoring apparatus employs a monopole antenna surrounded by metal plates and posts, configured to reflect electromagnetic waves generated by aerial corona and breaker operations, preventing low-frequency electromagnetic waves from reaching the antenna and thus suppressing communication errors and circuit destruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wireless communication is used to reduce cable-laying work, then installation cost and complexity are reduced, but communication errors and circuit destruction occur due to electromagnetic waves from aerial corona and breaker operations
Solution Approach 1:
A ground plate is introduced as an intermediary component between the antenna and the electromagnetic environment. The ground plate serves as a mediator that reflects electromagnetic waves generated by aerial corona and breaker operations, preventing these waves from reaching the antenna while allowing the antenna to maintain wireless communication functionality. This resolves the contradiction by adding a simple reflective barrier that protects the communication system without requiring cable installation.
Solution Approach 2:
The invention converts the harmful electromagnetic waves into a beneficial reflection pattern. By positioning the ground plate at a specific distance from the antenna (between 0.05λ and 0.5λ, where λ is the wavelength), the electromagnetic waves that would otherwise cause communication errors are reflected away from the antenna. The harmful high-intensity electromagnetic fields are thus redirected to protect the communication circuit, transforming the harmful radiation into a protective reflection mechanism.
2Ease of operation
If an antenna is equipped for wireless communication, then cable-laying work is reduced, but electromagnetic waves from aerial corona cause communication errors
Solution Approach 1:
The ground plate acts as a protective intermediary positioned between the antenna and the source of electromagnetic interference (aerial corona). This mediator reflects the harmful electromagnetic waves before they can reach the antenna, allowing wireless communication to operate without cable installation while protecting against electromagnetic interference from corona discharge.
Solution Approach 2:
The invention extracts the harmful electromagnetic waves from the antenna's reception path by using the ground plate to reflect them away. The ground plate selectively reflects low-frequency electromagnetic waves (which cause communication errors) while allowing the antenna to continue functioning for wireless communication, thus separating the harmful interference from the useful signal transmission.
3Productivity
If an antenna is equipped for wireless communication, then cable-laying work is reduced, but electromagnetic waves from breaker operations may destroy communication circuits
Solution Approach 1:
The ground plate serves as a protective intermediary that reflects high-intensity electromagnetic waves generated during breaker operations away from the antenna and communication circuits. This allows the system to maintain high installation efficiency through wireless communication while protecting vulnerable circuits from destructive electromagnetic pulses during breaker switching events.
Solution Approach 2:
The ground plate provides beforehand cushioning by being pre-positioned to reflect electromagnetic waves before they can reach and damage the communication circuit. The reflective barrier is in place before breaker operations occur, cushioning the communication circuit against potential electromagnetic destruction during high-stress switching events.
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 effectively suppresses communication errors and prevents communication circuit breakdowns from electromagnetic interference, eliminating the need for protective circuits and ensuring reliable wireless communication in electric power stations.
Implementation Method 1
The monitoring apparatus employs a monopole antenna surrounded by metal plates and posts, configured to reflect electromagnetic waves generated by aerial corona and breaker operations
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
An antenna unit (3) includes a metal plate (5) that is placed on a monitoring panel (2) horizontally and grounded, a monopole antenna (6) that is placed on the metal plate (5), a metal plate (7) that is placed above and in parallel with the metal plate (5) and faces the metal plate (5), and a plurality of posts (8) that is placed so as to surround the monopole antenna (6) and couples the metal plate (5) to the metal plate (7). A distance between the metal plates (5) and (7) has a length that is a half of a wavelength of a radio wave used in wireless communication. Each distance between neighboring ones of the posts (8) has a length that is a half of the wavelength.