Split-Ring Dual-Polarization Antenna With Orthogonal Radiation Patterns
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Solution Overview
Problem
Existing antennas with split-ring resonators fail to ensure orthogonality of radiation patterns between dual-polarized waves when an additional split-ring resonator is arranged on a side adjacent to the existing one on a conductive board.
Innovation Solution
A compact dual-polarization antenna design where antenna elements with split-ring resonators are arranged on opposite sides of a nearly rectangular conductive board, with feeding wires electrically connected to the split-ring conductors to maintain the same orientation of electric fields in polarization directions, ensuring orthogonality of radiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an additional split-ring resonator is arranged on a side adjacent to the existing split-ring resonator on the conductive board, then the antenna achieves dual-polarization capability, but the orthogonality of radiation patterns between two polarized waves cannot be ensured
Solution Approach 1:
The patent transitions from arranging antenna elements in a planar configuration to a three-dimensional configuration by placing split-ring resonators on opposite sides of the conductive board. This spatial dimensionality change enables dual-polarization capability while maintaining radiation pattern orthogonality, as the opposite-side arrangement creates independent polarization planes that do not interfere with each other's radiation patterns.
2Manufacturing precision
If antenna elements are arranged on opposite sides of the conductive board, then the orthogonality of radiation patterns is improved, but the device complexity increases
Solution Approach 1:
The patent merges the dual-polarization function into a single antenna structure by integrating two split-ring resonators on opposite sides of one conductive board, rather than using separate antenna elements. This consolidation achieves the desired radiation pattern orthogonality while reducing overall device complexity through functional integration and shared grounding structure.
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 design achieves high orthogonality of radiation patterns for dual-polarized waves, enabling a compact dual-polarized antenna with improved performance.
Implementation Method 1
each of the antenna elements comprises the feeding wire, the ground terminal separated from the conductive board and a split-ring conductor of a shape which is a ring but is partially cut by a split portion; and the feeding wire is electrically connected with the split-ring conductor
Data Source
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AI summary
The purpose of the present invention is to provide a small dual polarization antenna using a split ring resonator, for example, and a substrate and a communication device for the antenna. An antenna (A1) is provided with antenna elements (a2) provided one by one on the respective sides of a substantially rectangular conductor plate (a1), for example. In the antenna (A1), each of the antenna elements (a2) is provided with a split ring conductor (a22) having a shape in which a ring is partially cut by a split part (a21) and a feeding wire (a23), the feeding wire (a23) is electrically connected to the split ring conductor (a22) and extends in a direction across a region formed inside the split ring conductor (a22), and the two antenna elements (a2) provided on arbitrary two sides facing each other of the conductor plate (a1) among the four antenna elements (a2) are each supplied with power through the feeding wire (a23) included in each antenna element so as to have substantially the same direction of the electric field in a polarization direction.