Low-Profile Wideband Antenna Array for Radiation Pattern Control
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Solution Overview
Problem
Existing multiple-antenna systems face challenges in achieving wideband controlled directivity while minimizing visual and electromagnetic interference, especially in compact and mobile applications.
Innovation Solution
The development of a low-element adaptive antenna array with broadband elements, comprising a grounded plate, active radiator elements, supplementary passive elements, and director elements, allowing for controlled radiation patterns and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple-antenna systems are used to improve communication performance and control radiation patterns, then data throughput and link range increase, but visual and electromagnetic interference increase
Solution Approach 1:
The antenna system is divided into multiple independent antenna elements that can be individually controlled. Each element contributes to the overall radiation pattern while the segmented structure allows for spatial diversity, enabling the system to achieve high data throughput through multi-path communication while reducing interference through selective element activation and beamforming techniques.
2Adaptability or versatility
If broadband elements are used to achieve wideband communication capabilities, then frequency range increases, but maintaining controlled directivity becomes more difficult
Solution Approach 1:
The antenna system employs dynamic beamforming capabilities where the radiation pattern can be electronically steered and adjusted across different frequencies. This dynamic control allows the system to maintain optimized directivity throughout the wideband frequency range by adapting the phase and amplitude weights of individual elements in real-time, resolving the conflict between broadband operation and controlled directivity.
3Volume of moving object
If compact antenna structures are used for mobile applications, then device size decreases, but radiation pattern control capability is reduced
Solution Approach 1:
The patent implements a nested element configuration where multiple antenna elements are arranged in concentric circular patterns on a compact planar surface. This nested layout maximizes the effective aperture and element spacing within a small footprint, enabling full radiation pattern control capabilities including beam steering and null formation despite the constrained physical size required for mobile applications.
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 high-gain, compact, and adaptable antenna systems capable of controlling radiation patterns, minimizing interference, and supporting wideband communication across various frequency ranges without the need for delay lines.
Implementation Method 1
designed to receive and transmit HF, UHF, and SHF radio signals
Implementation Method 2
minimizing and even eliminating associated visual and electromagnetic interference
Implementation Method 3
A plurality of director elements are mounted in an evenly spaced manner around the periphery of the conductive plate
Data Source
AI summary
An extremely broadband compact antenna is provided with a plurality of passive elements mounted evenly spaced is a circular pattern on a grounded electrical conductive round plate. The circular pattern is on a circle concentric and spaced from cylindrical active elements mounted at the center of the plate. A plurality of director elements are mounted in an evenly spaced manner around the periphery of the plate. The number, shape, and location of the passive and director elements are variable to provide various selected signal radiator patterns for various applications.