Nested Multiband Antenna Array for Compact Massive MIMO
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Solution Overview
Problem
Existing multiband antenna arrays are too large in size and do not support Massive MIMO operation, limiting their versatility in mobile communication systems.
Innovation Solution
A compact multiband antenna arrangement with MIMO radiator rows and dual-polarized radiators, including low-band, mid-band, and wide-band radiators, arranged to minimize length while enabling Massive MIMO functionality through phase shifters and reflector arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radiators for different frequency ranges are integrated, then the antenna supports multiple communication standards, but the antenna size becomes large
Solution Approach 1:
The patent integrates high-frequency radiators inside low-frequency radiators, creating a nested structure where smaller high-band radiators are positioned within the volume of larger low-band radiators. This allows multiple frequency ranges to be supported within a compact overall structure, resolving the contradiction between multi-standard support and antenna size.
Solution Approach 2:
The patent arranges radiators in multiple rows (first and second MIMO radiator rows) and utilizes three-dimensional space efficiently. By distributing radiators across different spatial dimensions and positions, the antenna achieves compact integration of multiple frequency ranges while maintaining performance.
2Adaptability or versatility
If traditional multi-column antenna arrays are used, then multiple frequency ranges are supported, but Massive MIMO operation is not possible
Solution Approach 1:
The patent divides the antenna into segmented MIMO radiator rows with multiple dual-polarized radiators, where each row can be independently controlled. This segmentation enables Massive MIMO operation by providing sufficient radiators organized in a structured manner, while the integrated low-band radiators simultaneously provide broad frequency coverage.
Solution Approach 2:
The low-band radiators are designed with dual polarization capability and can function across multiple frequency ranges, making them multi-functional elements that contribute to both frequency coverage and MIMO operations, thereby reducing overall system complexity.
3Device complexity
If radiators are arranged to support Massive MIMO, then MIMO capability is enabled, but the antenna length increases
Solution Approach 1:
The patent transitions from linear arrangement to a multi-row three-dimensional configuration, where MIMO radiators are distributed across first and second rows in space. This dimensional change allows sufficient radiators for Massive MIMO to be packed into a compact volume without proportionally increasing length.
Solution Approach 2:
High-frequency MIMO radiators are nested within the structure of low-frequency radiators, allowing MIMO functionality to be achieved without adding significant external dimensions. The nested arrangement enables dense packing of radiators needed for Massive MIMO while maintaining compact overall length.
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 design allows for a compact, easily expandable antenna system that supports multiple communication standards and frequencies, including Massive MIMO, with efficient use of space and reduced length.
Implementation Method 1
a reflector arrangement (9) is provided, consisting of or comprising a common (e.g., one-piece) reflector or several individual reflectors. The dual-polarized radiators of the first and second MIMO radiator rows are spaced apart from this reflector arrangement.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2
AI summary
A multiband antenna array (1) comprises at least one first radiating element array (2a) which comprises at least one first and one second row (4a, 4b) of MIMO radiating elements. The two rows (4a, 4b) of MIMO radiating elements comprise a plurality of dual-polarised radiating elements (5a, 5b). The at least one first radiating element array (2a) comprises at least one dual-polarised low-band radiating element (6a). A reflector array (9) is provided, from which a) the dual-polarised radiating elements (5a, 5b) of the first and second rows (4a, 4b) of MIMO radiating elements and b) the at least one dual-polarised low-band radiating element (6a) are spaced. The at least one dual-polarised low-band radiating element (6a) comprises at least four directive radiating element devices (10a, 10b, 10c, 10d), which are each offset relative to one another by at least approximately 90° and delimit an accommodation space (11). In the accommodation space (11) there are at least one or at least two dual-polarised radiating elements (5a) from the first row (4a) of MIMO radiating elements and at least one or at least two dual-polarised radiating elements (5b) from the second row (4b) of MIMO radiating elements.