Hexagonal Antenna Lattice for Dense MIMO Beamforming
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Solution Overview
Problem
Conventional antenna configurations for beamforming in wireless communications, particularly with large numbers of antenna elements, face inefficiencies in terms of antenna placement and coupling, leading to suboptimal performance in multiple-input, multiple-output (MIMO) communications.
Innovation Solution
A hexagonal antenna lattice design is implemented for MIMO communications, which achieves higher antenna density and gain while maintaining a minimum half-wavelength separation between elements, allowing for efficient 3D or angular beamforming by indexing antenna elements according to various axes and calculating phases based on cartesian and polar coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional antenna configurations are used for beamforming with large numbers of antenna elements, then antenna placement and coupling become inefficient, but achieving higher antenna density and gain is desired
Solution Approach 1:
The patent applies a hexagonal lattice geometry instead of conventional rectangular arrangements. This hexagonal configuration optimizes spatial distribution of antenna elements, achieving higher antenna density while maintaining appropriate spacing to reduce coupling effects. The hexagonal geometry provides more uniform angular distribution compared to rectangular grids, improving beamforming performance.
Solution Approach 2:
The patent extends the antenna array from traditional 2D rectangular planes to 3D hexagonal lattice structures. This dimensional transition allows for more efficient spatial utilization and better control over electromagnetic field distribution, enabling higher density placement while managing coupling through the additional spatial dimension.
2Power
If antenna elements are placed closer together to increase density, then antenna gain improves, but coupling between elements increases
Solution Approach 1:
The hexagonal lattice geometry provides optimal spacing relationships between adjacent elements. The 60-degree angular separation in hexagonal arrangements creates more uniform current distribution and reduces mutual coupling compared to rectangular grids, allowing elements to be placed closer while maintaining acceptable coupling levels.
Solution Approach 2:
The patent applies different phase and amplitude weighting to individual antenna elements based on their specific positions within the hexagonal lattice. This localized adjustment compensates for residual coupling effects and optimizes the overall array pattern, allowing higher density placement while maintaining gain performance.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A first wireless device may transmit one or more signals to a second wireless device using an antenna panel including antenna elements that are arranged in a hexagonal configuration. The signals may be transmitted using one or more directional beams for multiple-input multiple-output communications with the second wireless device, the directional beams generated based on the antenna elements in the hexagonal configuration. The first wireless device may receive a signal from the second wireless device, and in some cases, the first wireless device may transmit one or more reference signals via the one or more directional beams, the reference signals associated with a set of two or more antenna elements of the antenna panel of the first wireless device. The second wireless device may perform measurements of the reference signals and transmit a measurement report to the first wireless device.