90-Degree Rotated U-Shaped MIMO Antenna for 5G Isolation
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Solution Overview
Problem
Current 2*2 or 4*4 MIMO antenna structures in 4G systems are inadequate for the increased transmission rates and connection reliability required in 5G systems, and there is a need for a multi-antenna design that can cover the 3.3 GHz-6 GHz frequency bands while accommodating the thinner form factor of handheld devices.
Innovation Solution
An ultra-wideband antenna unit with a 90°-rotated U-shaped radiator and feeder structure, including slots, which generates dual resonances to achieve wideband performance, and a MIMO antenna configuration with multiple antenna units arranged on a ground plate to ensure coverage across the 5G frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If more antenna units are used in MIMO structure to increase transmission rate and connection reliability, then the channel capacity and communication quality are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The antenna unit is segmented into distinct functional components: a radiator with specific geometric shape, a feeder with defined structure, and two strategically positioned slots. This segmentation allows each component to be optimized independently while maintaining overall system performance, enabling reliable 6*6 or 8*8 MIMO configurations without excessive complexity
Solution Approach 2:
The patent introduces spatial dimensionality through the three-dimensional configuration of the feeder (with second and third vertical parts on different sides) and the positioning of slots at specific distances from the radiator. This dimensional approach enables multiple antenna units to be packed efficiently in space, achieving high connection reliability through multiple antennas while controlling overall device complexity
2Productivity
If more antenna units are used in MIMO structure to increase transmission rate, then the channel capacity is improved, but the manufacturing cost increases
Solution Approach 1:
The antenna unit is divided into manufacturable segments (radiator, feeder, slots) that can be produced using standard PCB fabrication techniques. This segmentation enables mass production through conventional manufacturing processes, achieving high transmission rates with multiple antenna units while keeping manufacturing costs controlled
Solution Approach 2:
The patent employs parameter optimization in the geometric dimensions of the radiator and feeder, as well as the distance parameters of the slots, to achieve ultra-wideband performance. By optimizing these parameters, the design achieves high productivity (transmission rate) without requiring expensive custom manufacturing processes
3Adaptability or versatility
If antenna structure is designed to cover all 5G frequency bands (3.3 GHz-6 GHz), then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The antenna unit is designed as a universal structure capable of operating across all 5G frequency bands (3.3 GHz-6 GHz) and below. The multi-functional design, featuring the specific radiator-feeder-slot configuration, allows a single antenna unit type to serve multiple frequency bands, improving adaptability while avoiding the complexity of multiple specialized antenna designs
Solution Approach 2:
The patent achieves wide frequency coverage by utilizing three-dimensional spatial configuration of the feeder (with vertical parts extending in different directions) and positioning slots at specific distances from the radiator. This dimensional approach enables ultra-wideband performance across 5G frequency bands without requiring complex multi-resonator structures
4Volume of moving object
If handheld devices are made thinner with narrower frame, then the portability is improved, but the isolation between antennas becomes more difficult to achieve
Solution Approach 1:
The patent utilizes the third dimension (vertical direction) by configuring the feeder with second and third vertical parts located on different sides of the third horizontal part, and positioning slots at specific vertical distances from the radiator. This dimensional approach enables sufficient antenna isolation in thin devices by exploiting spatial separation in the vertical dimension rather than relying solely on horizontal spacing
Solution Approach 2:
The antenna unit is segmented with the feeder positioned at a specific distance from the radiator, creating natural isolation zones. This segmentation allows multiple antenna units to be arranged in thin devices while maintaining required isolation between them, preserving signal quality and reliability despite reduced device thickness
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 an ultra-wideband antenna unit that is simple to manufacture, cost-effective, and capable of covering all 5G frequency bands below 6 GHz, ensuring high efficiency and isolation between antennas, suitable for use in thin, full-screen handheld devices.
Implementation Method 1
The antenna unit generates two adjacent dual resonances by means of the structures of the feeder and the radiator, as well as the first slot and the second slot
Data Source
AI summary
An antenna unit, a MIMO antenna and a handheld device. The antenna unit includes a feeder and a radiator, wherein the radiator is in a 90°-rotated U shape and includes a first horizontal part, a first vertical part and a second horizontal part, two ends of the first vertical part are respectively connected to the first horizontal part and the second horizontal part; the feeder is located in the U shape and includes a second vertical part, a third horizontal part and a third vertical part, two ends of the third horizontal part are respectively connected to the second vertical part and the third vertical part, and the second vertical part and the third vertical part are located on different sides of the third horizontal part. The MIMO antenna has an ultra wideband.