Multiband Blade Antenna with Slanted Open Sleeve
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Solution Overview
Problem
Existing antennas for nautical and aeronautical applications are not aerodynamic and require multiple antennas for different frequency bands, which increases complexity and mechanical vulnerability.
Innovation Solution
A compact multiband blade antenna with a slanted design and open sleeve element, capable of covering VHF, UHF, and upper UHF bands in a single blade, reducing size and aerodynamic drag, and optionally incorporating a phasing element to further minimize size and interactions between resonant bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used for different frequency bands, then communication coverage is improved, but device complexity and mechanical vulnerability increase
Solution Approach 1:
The patent combines multiple frequency band antennas into a single integrated blade antenna structure. The blade antenna incorporates multiple resonant elements with different lengths and configurations that can operate across VHF, UHF, and other frequency bands simultaneously, eliminating the need for multiple separate antennas while maintaining broad communication coverage
Solution Approach 2:
The blade antenna is designed as a universal multiband antenna that can function across multiple frequency bands. By incorporating adjustable resonant elements and multiple transmission lines with different characteristic impedances, the single antenna structure can adapt to operate in VHF, UHF, and other bands, providing multi-functionality without requiring multiple specialized antennas
2Reliability
If traditional monopole or dipole antennas are used, then communication performance is achieved, but aerodynamic performance deteriorates
Solution Approach 1:
The patent employs a blade antenna geometry with curved and streamlined contours that follow aerodynamic principles. The blade structure features smooth transitions and optimized cross-sectional shapes that reduce turbulence and drag compared to traditional straight monopole or dipole antennas, while maintaining effective electromagnetic radiation across multiple frequency bands
3Volume of moving object
If blade antenna size is reduced for compactness, then aerodynamic performance is improved, but interaction between resonant bands increases
Solution Approach 1:
The patent divides the blade antenna into multiple segmented resonant elements, each responsible for specific frequency bands. The blade contains separate transmission lines and resonant structures for VHF, UHF, and other bands that are electrically isolated through strategic positioning and impedance matching, allowing compact size while minimizing unwanted interactions between different frequency bands through proper segmentation and spacing
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 compact multiband blade antenna provides efficient communication across multiple frequency bands with improved aerodynamics and mechanical robustness, reducing the need for multiple antennas and minimizing interactions between bands, thus enhancing performance and reliability in aviation and maritime environments.
Implementation Method 1
These traces are of dimensions to provide resonance in the particular targeted frequency bands of the antenna
Data Source
AI summary
A multi-band blade antenna with an open sleeve and slanted design housed within a blade antenna housing. The blade antenna has three resonant bands with one very high frequency (VHF) band and two ultra-high frequency (UHF) bands.