Orthogonal Dipole Antenna for Reduced Electrical Coupling
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Solution Overview
Problem
Existing telecommunications antennas face challenges in minimizing electrical coupling and signal interference due to their large size, which restricts their deployment in spatially constrained environments, and prior art beam shaping solutions are not well-suited for masthead or cell tower deployment.
Innovation Solution
A telecommunications antenna system featuring a conductive ground plane with broadband radiators, where each radiator includes first and second dipole elements tuned to different frequencies, oriented orthogonally to minimize electrical coupling, and a phase shifter to provide directional beam patterns, allowing for increased signal gain and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple dipole elements are used to increase signal gain and coverage, then the antenna capacity is improved, but the antenna size increases and electrical coupling between elements occurs
Solution Approach 1:
The patent positions dipole elements in three-dimensional space with specific spatial relationships, using vertical and horizontal separation to achieve isolation without increasing overall antenna footprint. The elements are arranged at different heights and angles to minimize coupling while maintaining compact dimensions.
Solution Approach 2:
The patent optimizes the electrical length of dipole elements by adjusting their physical dimensions to resonate at specific frequencies. By carefully controlling the length and orientation parameters of each element, the antenna achieves desired gain while minimizing unwanted coupling effects between elements.
2Volume of moving object
If multiple dipole elements are placed closer together to reduce antenna size, then the antenna becomes more compact, but electrical coupling and signal interference increase
Solution Approach 1:
The patent applies different orientations and positioning strategies to individual dipole elements based on their specific functions. Each element is locally optimized with respect to its orientation and position to minimize coupling with neighboring elements while maintaining overall compactness of the antenna structure.
Solution Approach 2:
The patent uses asymmetric positioning of dipole elements rather than uniform spacing, with elements placed at different heights and angular orientations. This asymmetric arrangement breaks the symmetry that would otherwise promote coupling, allowing compact dimensions while reducing interference between elements.
3Productivity
If beam shaping techniques are implemented to increase coverage in demanding geographic environments, then the call carrying capacity is improved, but the device complexity increases
Solution Approach 1:
The patent divides the antenna system into multiple independent dipole elements that can be individually controlled and optimized. This segmentation allows for beam shaping capabilities through simple phase and amplitude control of each element, achieving coverage enhancement without requiring complex beam-forming devices.
Solution Approach 2:
The patent designs the multi-element antenna structure to serve multiple functions: providing omnidirectional coverage, achieving beam shaping for directional coverage, and maintaining compact dimensions. This universal design eliminates the need for separate complex beam-forming devices by integrating these capabilities into the antenna structure itself.
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 antenna system achieves significant isolation between dipole elements, exceeding 21 decibels of isolation, minimizing interference while maintaining a compact design suitable for spatially constrained areas, and enhances signal quality by directing RF energy effectively.
Implementation Method 1
at least one of the dipole elements associated with one broadband radiator is spatially positioned relative to the respective dipole element of the other broadband radiator to minimize electrical coupling therebetween
Implementation Method 2
a multiple input, multiple-output phase shifter to provide a directional beam pattern over a specific geographic region
Data Source
AI summary
A telecommunications antenna comprising a conductive ground plane and at least one pair of broadband radiators mounted, and electrically connected, to the conductive ground plane. Each of the broadband radiators includes first and second dipole elements wherein the first dipole element is tuned to a first broadband frequency and the second dipole element is tuned to a second broadband frequency. At least one of the dipole elements associated with one broadband radiator is spatially positioned relative to the respective dipole element of the other broadband radiator to minimize electrical coupling therebetween. Dipole elements tuned to the same frequency on each broadband radiator are oriented orthogonally to mitigate electrical coupling across the dipole elements.