Multi-Band Antenna Element With 3D Integrated Feeding Networks
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Solution Overview
Problem
Existing antenna devices face challenges in integrating multiple frequency bands without increasing the form factor or wind-load, which is essential for supporting 5G standards and reducing complexity.
Innovation Solution
The proposed solution involves a dielectric body with metal layers, where the feeding networks for different antenna arrays are integrated into the dielectric body itself, avoiding line crossings and the need for multi-layer PCB structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple frequency bands and antenna ports are integrated into a single antenna device, then the number of frequency bands and antenna ports per band increases, but the device complexity increases
Solution Approach 1:
The patent merges multiple feeding networks for different frequency bands into a single integrated structure. The feeding network is formed by conductive traces on a single substrate that is integrated with the radiating elements, eliminating the need for separate feeding networks for each frequency band. This consolidation reduces the number of components and interconnections while supporting multiple frequency bands and antenna ports.
Solution Approach 2:
The feeding network is designed with universal functionality to support multiple frequency bands and polarization modes. The same feeding network structure can operate across different frequency ranges (e.g., 700 MHz, 800 MHz, 900 MHz, 1800 MHz, 2100 MHz, 2600 MHz) and support both horizontal and vertical polarizations, eliminating the need for separate dedicated feeding networks for each function.
2Length of stationary object
If the form factor and wind-load are kept comparable to legacy antenna devices, then the mechanical support structure can be reused, but the integration of multiple frequency bands becomes more challenging
Solution Approach 1:
The patent employs a nested structure where the feeding network is integrated within the same substrate as the radiating elements. The conductive traces are formed on the substrate in a compact arrangement that fits within the existing form factor constraints. This nested integration allows multiple frequency bands to be accommodated without increasing the overall device dimensions, enabling reuse of existing mechanical support structures.
3Ease of operation
If conventional multi-layer PCB structures are used for feeding networks, then line crossings can be achieved, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The patent resolves line crossing requirements by transitioning from a two-dimensional planar trace layout to a three-dimensional structure. The substrate is folded or bent to create multiple layers and levels, allowing feeding traces to cross each other in three-dimensional space without requiring complex multi-layer PCB stacking. This dimensional approach simplifies manufacturing while achieving the necessary trace routing flexibility.
Data Source
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AI summary
The present disclosure relates to antenna devices and antenna elements. In particular, the disclosure provides an antenna element for a multi-band antenna device. The antenna element comprises a dielectric body provided with metal layers, wherein the dielectric body comprises a base plate and one or more wall elements arranged on the base plate. Further, one or more first radiating elements and one or more second radiating elements are arranged on the base plate, and are respectively configured to radiate in a first and a second frequency band. In addition, a first feeding network is connected to the first radiating elements and a second feeding network is connected to the second radiating elements, respectively for operating first and second radiating elements as a first and second antenna array. The first feeding network is provided, at least partly, as a metal layer of the one or more metal layers on the one or more wall elements.