Sinusoidal Cylindrical Antenna for Multi-Polarization Gain Control
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Solution Overview
Problem
Existing antennas, such as helix-shaped antennas, are limited in their ability to provide dual polarizations and often require multiple antennas for different polarization modes, leading to increased size and weight, and do not offer optimal gain and beamwidth characteristics.
Innovation Solution
A communications device featuring a circular cylindrical antenna with a conductive ground plane and multiple conductive sinusoidal elements extending outwardly, capable of operating in various polarization modes, including right-handed and left-handed circular polarization, and linear polarization, using a coaxial cable feed and a feed network for flexible operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a helix-shaped antenna is used to provide directional radiation, then directional gain is improved, but the antenna cannot provide dual polarizations and requires multiple antennas for different polarization modes, increasing size and weight
Solution Approach 1:
The patent combines multiple polarization capabilities (right-handed circular, left-handed circular, and linear polarizations) into a single helix-shaped antenna structure. The antenna achieves this by utilizing the inherent helical geometry to radiate multiple polarization modes simultaneously, eliminating the need for separate antennas for different polarizations and thereby reducing overall system size and weight while maintaining directional gain
Solution Approach 2:
The helix-shaped antenna is designed to perform multiple functions: it provides directional radiation with high gain while simultaneously supporting dual circular polarizations and linear polarization. This multi-functional design allows a single antenna structure to replace what would traditionally require multiple specialized antennas, achieving versatility without sacrificing directional performance
2Ease of manufacture
If traditional Euclidian geometry antennas are used, then manufacturing simplicity is improved, but radiation pattern control and directivity are limited
Solution Approach 1:
The patent employs a helix-shaped geometry that incorporates curved three-dimensional structure instead of traditional straight-line or planar Euclidian forms. This helical curvature enables superior radiation pattern control and enhanced directivity while maintaining relative manufacturing simplicity through standard helix fabrication techniques, bridging the gap between geometric simplicity and radiation performance
3Power
If a Yagi-Uda antenna is used to achieve high directivity, then beam directionality is improved, but bandwidth is narrowed and application versatility is limited
Solution Approach 1:
The patent achieves high directivity with broad bandwidth by optimizing key helical antenna parameters including the number of turns, pitch, diameter, and length of the helix structure. By carefully adjusting these geometric parameters, the antenna maintains superior directional performance while extending operational bandwidth beyond what traditional Yagi-Uda antennas can achieve, enabling broader application versatility
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 provides a compact, efficient antenna design that supports multiple polarization modes with higher gain and narrower beamwidth, surpassing the performance of traditional helix antennas by offering improved gain and radiation patterns, including axial null radiation patterns.
Implementation Method 1
The circular cylindrical antenna may comprise a conductive ground plane, at least one conductive feed associated with the conductive ground plane, and at least one conductive sinusoidal element coupled to the at least one conductive feed and extending outwardly from the conductive ground plane along a circular cylinder
Data Source
AI summary
A communications device may include an RF device, and a circular cylindrical antenna coupled to the RF device. The circular cylindrical antenna may include a conductive ground plane, a conductive feed associated with the conductive ground plane, and a conductive sinusoidal element coupled to the conductive feed and extending outwardly from the conductive ground plane along a circular cylinder.