Multi-Band Antenna Layout Using Nested Band Assemblies
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Solution Overview
Problem
Existing multi-band antennas for mobile communication are complex to manufacture due to the need for interleaved antenna arrays and feeding networks, which complicates the integration of different frequency bands within a limited space.
Innovation Solution
A multi-band antenna design featuring separate band assemblies with radiators for different frequency bands mounted on distinct supports, where radiators for one frequency band can pass through cut-outs in the support of another band assembly, simplifying manufacturing and allowing for efficient distribution network placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If interleaved antenna arrays with different frequencies are used, then multi-band operation is achieved, but manufacturing complexity increases
Solution Approach 1:
The antenna system is divided into separate band assemblies, each handling a specific frequency band. The first band assembly includes a first support with first radiators for lower frequencies, while the second band assembly includes a second support with second radiators for higher frequencies. This segmentation allows each band to be manufactured and assembled independently, reducing overall manufacturing complexity while maintaining multi-band versatility.
Solution Approach 2:
The second band assembly is positioned within the space defined by the first band assembly. The second support is arranged below the first support, and the second radiators extend through cut-outs in the first support structure. This nested arrangement allows both band assemblies to coexist in a compact configuration without requiring separate interleaved arrays, simplifying manufacturing while achieving multi-band operation.
2Ease of manufacture
If separate supports for different frequency bands are used, then manufacturing is simplified, but space utilization becomes challenging
Solution Approach 1:
The antenna design transitions from a planar two-dimensional arrangement to a three-dimensional configuration. The first support and second support are arranged at different vertical levels, with the second support positioned below the first support. The radiators extend in multiple directions including vertically and horizontally, utilizing the third dimension (height) to accommodate separate band assemblies without increasing the horizontal footprint, thus maintaining compact volume while simplifying manufacturing.
Solution Approach 2:
The second band assembly is nested within the spatial envelope of the first band assembly. The second radiators pass through cut-outs in the first support structure, allowing the second band assembly to occupy the vertical space below the first support without requiring additional horizontal space. This nested positioning achieves compact volume utilization while maintaining the manufacturing simplicity of separate supports.
Data Source
AI summary
A multi-band antenna has a first band assembly and at least one second band assembly, wherein the first band assembly comprises a first support and at least one first radiator for frequencies in a first frequency band, wherein the second band assembly comprises a second support and at least one second radiator mounted to the second support for frequencies in a second frequency band, wherein the second support is arranged below the first support, and wherein the at least one second radiator extends through an associated cut-out in the first support and further from the top side of the first support upwards. Further, a mobile communication base station is provided.