Antenna Grounding Structure for Narrow Bandwidth Anti-Interference
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Solution Overview
Problem
Conventional microwave detection antennas face significant interference from nearby electromagnetic radiation frequencies, particularly with the emergence of 5G technology, leading to inaccurate detection results and increased interference across multiple frequency bands, necessitating an enhancement in anti-interference capabilities.
Innovation Solution
The antenna design incorporates a radiating source electrically connected to a reference ground, creating a radiating clearance and lowering impedance to narrow the bandwidth, thereby reducing interference from nearby electromagnetic radiation frequencies and enhancing the anti-interference ability by grounding the radiating source and using a microwave driving circuit with a low impedance to match the antenna's impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna operates across multiple frequency bands to increase versatility, then adaptability improves, but interference from nearby electromagnetic radiation frequencies increases
Solution Approach 1:
The patent segments the frequency response of the antenna by introducing multiple resonant circuits, each tuned to specific frequency bands. This allows the antenna to selectively process different frequency ranges while maintaining a broad overall bandwidth, thereby reducing interference within each segmented band while preserving versatility.
Solution Approach 2:
The patent introduces resonant circuits as intermediary elements between the antenna element and the load. These resonant circuits act as frequency-selective mediators that allow desired frequency bands to pass through while blocking or attenuating interfering frequencies, thus resolving the contradiction between broad adaptability and interference rejection.
2Adaptability or versatility
If the bandwidth of the antenna is widened to improve versatility, then adaptability improves, but anti-interference ability deteriorates
Solution Approach 1:
The patent divides the broad bandwidth into multiple resonant frequency bands using separate resonant circuits. Each resonant circuit is tuned to a specific frequency range, creating segmented frequency response characteristics. This segmentation allows the antenna to maintain wide overall bandwidth while providing narrow, interference-resistant channels within each band.
Solution Approach 2:
The patent changes the electrical parameters (inductance and capacitance values) of multiple resonant circuits to create different resonant frequencies. By adjusting these parameters, the antenna can selectively emphasize or suppress specific frequency bands, thereby maintaining broad adaptability while enhancing anti-interference capability through parameter optimization.
3Reliability
If the center point of the radiating source is directly connected to the reference ground to lower impedance, then anti-interference ability improves, but manufacturing precision deteriorates due to soldering defects
Solution Approach 1:
The patent introduces an intermediary connection structure between the radiating source and the reference ground. Instead of directly soldering the small center point to the ground, the design uses an extended connection point or conductive trace that serves as an intermediary, making the connection more robust and easier to manufacture while maintaining the grounding function.
Solution Approach 2:
The patent extends the connection in a different dimensional direction, creating an extended connection point that protrudes or traces a path rather than being a simple point-to-point solder joint. This dimensional change transforms a precision-critical point connection into a more tolerant trace or extended structure that is easier to manufacture with standard PCB or wiring techniques.
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 reduces electromagnetic wave signal interference, stabilizes signal output, and improves the antenna's ability to operate within its primary radiating wave band, reducing harmonic radiation and enhancing the overall anti-interference performance.
Implementation Method 1
the antenna has a radiation source being electrically grounded by electrically connecting the radiation source to a reference ground to lower an impedance of the antenna. Therefore, the bandwidth of the antenna is narrowed down to effectively improve the anti-interference ability of the antenna
Data Source
AI summary
An antenna includes a reference ground and at least a radiating source spacedly disposed at the reference ground to define a radiating clearance between the radiating source and the reference ground, wherein the radiating source is electrically connected to the reference ground to ground the radiating source so as to narrow a bandwidth of the antenna. When a electromagnetic excitation signal is received at a feed point of the radiating source, the bandwidth of the antenna is narrowed down to prevent any interference of the electromagnetic wave signal received or generated by the antenna in response to nearby electromagnetic radiation frequency or stray radiation frequency of the adjacent frequency bands.