Variable Beamwidth Multiband Antenna Using Luneburg Lens
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Solution Overview
Problem
Current wireless communication networks face challenges in accommodating the rapid growth in data traffic and providing high-quality service due to bandwidth limitations, necessitating the development of next-generation wireless technologies that can efficiently manage multiband signal coverage.
Innovation Solution
The deployment of antennas with multiple independently operable feed elements positioned on or off the focal point of a lens antenna, combined with a dynamic weighted magnitude and phase shifting network, allows for the adjustment of beamwidths to provide uniform signal coverage across geographic areas regardless of distance, using a Luneburg Lens or similar antenna configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single antenna feed is used at the focal point of a lens antenna, then the antenna structure is simple, but the beamwidth cannot be adjusted and signal coverage is limited
Solution Approach 1:
The single antenna feed is divided into multiple independently operable antenna feed elements positioned at different locations on or off the focal point of the lens antenna. Each feed element can be controlled independently to generate separate beams, enabling beamwidth adjustment and enhanced adaptability without requiring a complete redesign of the antenna structure.
Solution Approach 2:
The antenna feed elements are equipped with dynamic weighted magnitude and phase shifting networks that allow real-time adjustment of beam characteristics. By dynamically controlling the amplitude and phase of each feed element, the system can adaptively adjust beamwidth and steering angles to match varying coverage requirements.
2Area of stationary object
If antenna coverage area increases with distance, then larger geographic areas can be covered, but signal density becomes non-uniform and resource allocation becomes inefficient
Solution Approach 1:
Different feed elements are positioned at specific locations on or off the focal point to create localized beam patterns. Each feed element provides coverage to a specific geographic region with optimized signal density. By combining multiple localized beams, the system achieves uniform overall coverage across varying distances while maintaining appropriate signal density in each local area.
3Adaptability or versatility
If multiple frequency bands are supported using separate antenna systems, then each band can be optimized, but the system becomes complex and space-consuming
Solution Approach 1:
The lens antenna structure with multiple feed elements is designed to support multiple frequency bands using a single unified system. The same physical antenna structure can operate across different bands by adjusting the excitation of feed elements, eliminating the need for separate antenna systems for each frequency band while maintaining optimized performance.
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
This solution enables efficient multiband signal coverage and uniform resource allocation, overcoming the issue of increasing coverage footprint with distance, thereby enhancing network performance and resource management in wireless communication systems.
Implementation Method 1
arranging a number of antenna feeds in an antenna array on or near the surface of a Luneburg Lens
Implementation Method 2
one or more antenna feeds positioned in an on or off-focal point of a lens antenna
Data Source
AI summary
An antenna system includes an antenna lens, and one or more antenna feeds placed at an on or off-focal point of the antenna lens. Each of the one or more antenna feeds comprises one or more antenna feed elements that are electrically independently operable. The antenna system also includes an antenna feed network electrically coupled with the one or more antenna feed elements via signal paths.