Luneburg Lens Antenna Multi-Beam Steering
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Solution Overview
Problem
Current broadband microwave antennas, particularly those in satellite and terrestrial communications, face challenges with high cost, power consumption, and limited frequency bandwidth due to the complexity of Electronically Steerable Array (ESA) antennas, which are also narrow-band and unable to operate across multiple frequencies simultaneously.
Innovation Solution
A low-cost, wide-angle, multi-beam, multi-frequency beamforming lens antenna system utilizing a Modified Luneburg Lens connected to a Planar Ultra-wideband Multiband Array (PUMA) antenna via an anti-reflective layer, enabling near or complete hemispherical coverage across multiple frequency ranges without the need for moving parts or extensive power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Electronically Steerable Array (ESA) antennas are used to achieve beam-steering capability, then the ability to direct energy beams in different directions without moving parts is improved, but the cost, power consumption, and device complexity increase significantly
Solution Approach 1:
The antenna system is segmented into distinct functional components: a planar antenna array for signal transmission and a separate lens structure for beam steering. This segmentation allows the complex beam-steering function to be achieved through the passive lens geometry rather than complex active circuitry, reducing device complexity while maintaining operational capability
Solution Approach 2:
The patent replaces the electronic control system of traditional ESA antennas with a passive optical lens system. The lens uses its geometric structure and material properties to steer beams mechanically rather than electronically, eliminating the need for complex phase shifters, amplifiers, and control circuitry while achieving the same beam-steering effect
2Adaptability or versatility
If Electronically Steerable Array (ESA) antennas are used to achieve multiple simultaneous beams, then the capability to radiate multiple beams simultaneously is improved, but the power consumption increases due to multiple TR modules operating simultaneously
Solution Approach 1:
The lens structure serves multiple functions simultaneously: it focuses signals from different antenna elements, steers multiple beams in different directions, and operates across multiple frequency bands. This multi-functionality allows the system to achieve multi-beam capability without requiring separate transmit-receive modules for each beam, thereby reducing power consumption
Solution Approach 2:
The lens system passively performs beam steering and focusing without requiring active power consumption for beam formation. The lens material and geometry automatically direct energy beams based on the position of the planar antenna elements, eliminating the need for powered phase shifters and control systems that would consume additional energy
3Reliability
If traditional parabolic reflector antennas are used, then the gain and directivity are improved, but the ability to track moving antennas is lost due to mechanical articulation requirements
Solution Approach 1:
The patent replaces the mechanical articulation system of traditional parabolic reflectors with a fixed lens structure combined with a planar antenna array. The lens maintains the high gain and directivity of parabolic reflectors while eliminating moving parts, allowing the system to track moving targets through electronic beam steering rather than mechanical rotation
4Adaptability or versatility
If conventional lens antennas are used, then the broadband operation is improved, but the gain and directivity are reduced compared to parabolic reflectors
Solution Approach 1:
The lens is constructed from composite materials with specifically engineered dielectric properties that enable both broadband operation and high gain. The composite structure allows the lens to maintain effective permittivity across wide frequency ranges while preserving the focusing and directing capabilities necessary for high gain 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
The solution provides a cost-effective, high-gain, wide-angle, multi-frequency beamforming capability with full hemispherical coverage, reducing power consumption and enabling simultaneous operation across multiple frequency bands, suitable for terrestrial wireless, satellite, and radar applications.
Implementation Method 1
a Luneburg lens with at least one planar interface in a southern hemisphere of the Luneburg lens
Implementation Method 2
configured to function as a feed network to illuminate cells of the Luneburg lens simultaneously
Implementation Method 3
connected to the Modified Luneburg Lens with a new anti-reflective layer
Data Source
AI summary
A high-gain, wide-angle, multi-beam, multi-frequency beamforming lens antenna that includes a Luneburg lens with at least one planar interface in the southern hemisphere of the Luneburg lens and a planar ultrawideband modular antenna (PUMA array) structure. The PUMA array structure is connected to at least one of the planar interfaces of the Luneburg lens and is configured to function as a feed network to illuminate cells of the Luneburg lens simultaneously.