Lens-Based Multibeam Antenna Layout for Lower-Complexity MIMO
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Solution Overview
Problem
Current wireless communication networks face challenges in accommodating high data traffic and providing high quality of service due to bandwidth limitations, and conventional MIMO antenna designs are computationally intense and face interference issues with linear antenna elements.
Innovation Solution
The use of multibeam antennas with a lens portion and antenna elements arranged in a three-dimensional array, utilizing varying refractive indices and signal processing to form spatially defined sectors, allowing for efficient signal coverage and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional MIMO antenna designs are used, then data transmission capability is improved, but computational load and interference increase
Solution Approach 1:
The patent segments the antenna system into multiple independent beamforming units, each handling a specific spatial sector. This segmentation allows parallel processing of multiple data streams without requiring complex centralized computation, thereby maintaining high data transmission capability while reducing overall computational load.
Solution Approach 2:
The patent introduces lens-based beamforming networks as intermediaries between the antenna elements and signal processing units. These intermediaries perform preliminary signal conditioning and spatial filtering, reducing the complexity of subsequent digital signal processing and enabling efficient MIMO operation.
2Ease of manufacture
If linear antenna elements are used, then ease of manufacture is improved, but interference issues increase
Solution Approach 1:
The patent transitions from linear antenna elements to curved or spherical antenna geometries. This curvature enables better spatial distribution of radiated energy and reduces constructive interference patterns that plague linear arrays. The curved geometry maintains manufacturing feasibility through standardized fabrication techniques while significantly reducing interference issues.
Solution Approach 2:
The patent moves antenna elements from one-dimensional linear arrangements to two-dimensional or three-dimensional curved configurations. This dimensional transition provides better spatial separation between elements, reducing mutual coupling and interference while maintaining ease of manufacture through modular assembly approaches.
3Productivity
If multibeam antennas with lens portion are used, then signal coverage efficiency is improved, but device complexity increases
Solution Approach 1:
The patent designs the lens portion to perform multiple functions simultaneously: beamforming, spatial filtering, and impedance matching. This multi-functionality reduces the need for separate components, thereby improving signal coverage efficiency without proportionally increasing device complexity. The same lens structure that focuses beams also provides spatial selectivity and impedance transformation.
Solution Approach 2:
The patent merges the beamforming network and lens antenna into a single integrated structure. This consolidation eliminates the need for separate feed networks and lens assemblies, reducing overall device complexity while maintaining the high signal coverage efficiency benefits of multibeam operation.
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 approach provides high cell capacity fixed wireless access with reduced computational load and interference, enabling efficient data transmission and reception across multiple users.
Implementation Method 1
a lens portion structured to focus radio frequency radiations entering from a radiation-side curved surface of the lens on a focal point
Implementation Method 2
a lens portion that is hemispherical in shape and comprises multiple hemispherical concentric shells having varying radio frequency refractive indices
Data Source
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AI summary
An antenna system that includes a lens portion having a radiation-side curved surface and a feed-side reception surface, the lens portion structured to focus radio frequency radiations entering from the radiation- side curved surface on a focal point located at the feed reception surface and one or more antenna elements at or near the focal point, the one or more antenna elements being separated from each other by a fractional multiple of a center wavelength of a frequency band of operation, and each antenna element communicatively coupled to one or more radio frequency transmit and/or receive chain and being able to transmit and/or receive data from the radio frequency transmit chain according to a transmission scheme.