Slanted 5G NR MIMO Antenna Array for Low-Band Pattern Independence
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Solution Overview
Problem
Existing 5G NR antennas experience degraded performance at lower frequencies due to lower radiation pattern independence, particularly in the 600 MHz range, which affects wireless throughput in MIMO systems.
Innovation Solution
A 5G NR MIMO antenna array configuration featuring four antennas arranged in a slanted formation, with each antenna orthogonal to two others and parallel to one, utilizing dielectric tapered spacers to create angles between substrates, enhancing radiation pattern independence and reducing polarization losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antennas are arranged in a conventional configuration, then the MIMO system can transmit and receive multiple data streams simultaneously, but the radiation pattern independence degrades at lower frequencies (600 MHz range)
Solution Approach 1:
The patent applies asymmetry by arranging four antennas in a slanted configuration rather than a symmetric planar arrangement. The antennas are positioned at different heights and angles, creating an asymmetric three-dimensional geometry that improves radiation pattern independence particularly at lower frequencies while maintaining MIMO functionality
Solution Approach 2:
The patent transitions from a two-dimensional planar antenna arrangement to a three-dimensional slanted configuration. By introducing vertical dimensionality and angular variations, the antenna array achieves better spatial separation and radiation pattern independence without compromising the MIMO system's ability to transmit and receive multiple data streams
2Device complexity
If antennas are positioned closer together to reduce device size, then the device complexity is reduced, but the polarization losses increase and radiation pattern independence decreases
Solution Approach 1:
By moving from a 2D planar configuration to a 3D slanted arrangement, the patent achieves better polarization independence and reduced energy losses without significantly increasing device footprint. The vertical and angular separations provide additional spatial degrees of freedom that maintain performance while controlling complexity
3Reliability
If a slanted configuration with dielectric tapered spacers is used to improve radiation pattern independence, then antenna performance at lower frequencies is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
Dielectric tapered spacers are introduced as intermediary components to achieve and maintain the slanted configuration. These spacers provide mechanical support and precise positioning for the antennas at different heights and angles, reducing the direct manufacturing complexity while ensuring the required geometric precision for optimal performance
Data Source
AI summary
An antenna array includes one or more substrates and four individual antennas in an orthogonal formation to improve radiation pattern independence. In various embodiments, a novel antenna array configuration is disclosed where one of the four antennas is orthogonal to two of the remaining three antennas. At least two of the four individual antennas are electrically coupled via transmission lines.