Dual Polarized Antenna Ring Conductor Isolation
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Solution Overview
Problem
Existing dual orthogonally polarized antennas suffer from poor isolation characteristics in their operating frequency band, leading to interference between vertically and horizontally polarized waves, which hampers high-speed communication applications.
Innovation Solution
The antenna design incorporates a dielectric layer with a ring-shaped conductor layer and feedlines that intersect, along with a conductor pin connected to a reference potential conductor layer, enhancing isolation by improving the symmetry of the ring-shaped conductor layer's potential distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antenna elements are orthogonally arranged to transmit and receive vertically and horizontally polarized waves, then dual polarization capability is achieved, but isolation between the polarized waves becomes low causing interference
Solution Approach 1:
A ring-shaped conductor layer is introduced as an intermediary element between the vertically and horizontally polarized antenna elements. This ring-shaped conductor acts as a mediator to improve isolation by controlling the electromagnetic field distribution, thereby reducing interference between the orthogonal polarized waves while maintaining dual polarization capability
Solution Approach 2:
The ring-shaped conductor layer is positioned at specific locations (such as along the feedline or at the antenna element boundaries) to locally enhance the isolation characteristics. By placing the ring-shaped conductor in strategic positions, the isolation is improved precisely where needed between the vertically and horizontally polarized elements without affecting the overall dual polarization functionality
Data Source
AI summary
An antenna includes: a dielectric layer including a first and second surface placed in layering; a ring-shaped conductor layer formed on the first surface; a first and second feedline that are closer to the first surface than the second, and are formed at positions different from those of the surfaces; a reference potential conductor layer formed on the second surface; and a conductor pin located in the inner diameter of the ring-shaped conductor layer in planar view from the direction of the layering, that is connected to the reference potential conductor layer. In the planar view, the first and second feedlines include portions overlapping with the ring-shaped conductor layer, and the extending directions of the feedlines intersect with each other. The ring-shaped conductor layer is connected to neither the reference potential conductor layer nor the conductor pin, and neither the first nor second feedline is connected to the conductor pin.