Magneto-Electric Dipole Antenna Array With Parasitic Resonators
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Solution Overview
Problem
Existing magneto-electric dipole antenna arrays face challenges in achieving enhanced gain, impedance bandwidth, impedance matching, and antenna isolation, while effectively suppressing mutual coupling effects among antenna units.
Innovation Solution
The proposed magneto-electric dipole antenna array incorporates a substrate with antenna units featuring electric-dipole and magnetic-dipole components, vertical and horizontal feeding probes, striplines for capacitive coupling, and parasitic resonators to enhance gain and suppress mutual coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If microstrip lines are used to connect magneto-electric dipole units, then the antenna array can be formed, but mutual coupling effects among antenna units occur
Solution Approach 1:
The patent introduces parasitic resonators as intermediary elements between adjacent magneto-electric dipole units. These resonators are not directly connected to the feed networks but couple electromagnetically with adjacent units, acting as mediators to cancel mutual coupling effects through destructive interference of coupled fields.
Solution Approach 2:
The parasitic resonators are designed to generate counter-phase electromagnetic fields that preemptively counteract the mutual coupling effects before they can degrade performance. By tuning the resonant frequency and impedance of these resonators, the patent creates preliminary anti-action that neutralizes harmful coupling.
2Ease of operation
If conventional feeding structures are used, then antenna units can be excited, but impedance bandwidth and matching are limited
Solution Approach 1:
The patent divides the feeding structure into separate electric-dipole and magnetic-dipole components, each fed independently through different probes. This segmentation allows independent optimization of impedance matching for electric and magnetic resonances, thereby expanding the overall impedance bandwidth through combined operation.
Solution Approach 2:
The magneto-electric dipole unit is designed to simultaneously support both electric dipole and magnetic dipole resonances through a unified structure. The same physical structure performs multiple functions: radiating through electric currents, magnetic currents, and their coupling, thereby achieving broad impedance bandwidth with a single antenna unit design.
3Power
If gain enhancement is pursued through array configuration, then directivity improves, but mutual coupling increases
Solution Approach 1:
Parasitic resonators are positioned between adjacent radiating elements to serve as electromagnetic mediators. These resonators couple with both elements and create destructive interference patterns that cancel mutual coupling, allowing close spacing for gain enhancement without suffering from coupling losses.
Solution Approach 2:
The patent transitions from conventional planar array spacing to a three-dimensional configuration where parasitic resonators are positioned in the vertical dimension between horizontal radiating elements. This dimensional change enables gain enhancement through close horizontal spacing while using vertical placement of resonators to suppress coupling.
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 solution achieves enhanced gain, impedance bandwidth, and antenna isolation, with suppressed mutual coupling, resulting in improved performance across the operating frequency band.
Implementation Method 1
The stripline is disposed in the substrate and between the first feeding probe and the second feeding probe for capacitive coupling
Implementation Method 2
Each of the at least one antenna unit includes an electric-dipole component, a magnetic-dipole component
Data Source
AI summary
A magneto-electric dipole antenna array includes a substrate and at least one antenna unit. Each of the at least one antenna unit includes an electric-dipole component, a magnetic-dipole component, a first feeding probe, a second feeding probe and a stripline. The electric-dipole component is disposed on an upper surface of the substrate. The magnetic-dipole component is disposed in the substrate and between the upper surface and a lower surface of the substrate, and is electrically connected to the electric-dipole component. The first feeding probe is disposed on the upper surface of the substrate for vertical polarization. The second feeding probe is disposed in the substrate and between the upper surface and the lower surface of the substrate for horizontal polarization. The stripline is disposed in the substrate and between the first feeding probe and the second feeding probe for capacitive coupling.