Antenna Array Matching Network for Cross-Polarization Decoupling
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Solution Overview
Problem
Existing antenna arrays face challenges in decoupling between polarizations, leading to deteriorated isolation performance, especially when subarrays are densely packed for beamforming.
Innovation Solution
The implementation of a matching network with a decoupling coupler between the power dividers for different polarizations in each subarray, which enhances isolation by reducing signal coupling between polarizations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If subarrays are densely packed to increase gain for beamforming, then signal gain is improved, but isolation between polarizations deteriorates
Solution Approach 1:
A decoupling network is introduced as an intermediary component between the first and second power dividers. This decoupling network includes coupling elements that selectively couple signals between the power dividers to cancel out mutual coupling effects between polarizations, thereby maintaining isolation performance while allowing dense subarray packing for high gain beamforming operations
2Reliability
If additional structural elements are added to improve cross-pol isolation, then isolation performance is improved, but device complexity increases
Solution Approach 1:
The decoupling network is integrated into the existing feeding network structure, sharing the same physical space and components. The coupling elements within the decoupling network serve multiple functions: they provide signal distribution like traditional power dividers while simultaneously providing decoupling functionality to improve cross-pol isolation, thereby avoiding additional structural elements
Solution Approach 2:
The decoupling functionality is merged with the power division functionality in a single integrated network. The first and second power dividers are combined with coupling elements in the same physical structure, allowing the system to achieve both signal distribution and polarization decoupling without requiring separate additional structural elements
Data Source
AI summary
An electronic device is provided. The electronic device includes an antenna substrate and an antenna array comprising a sub array, the sub array includes a plurality of antenna elements, feeding network circuitry including a first power divider for first polarization and a second power divider for second polarization, which differs from the first polarization, and network circuitry for decoupling of a first signal of the first power divider and a second signal of the second power divider, wherein the sub array is disposed on a first surface of the antenna substrate, and wherein the feeding network circuitry disposed on the first side or a second side opposite to the first side of the antenna substrate, and wherein the network circuitry for decoupling is disposed in a region between the first power divider and the second power divider in the first side or the second side of the antenna substrate.