Base Station Antenna Phase Dispersion for Beam Overlap Control
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Solution Overview
Problem
The increasing density of antenna arrays in base station antennas due to limited width constraints leads to deteriorated horizontal plane directivity pattern overlap ratios of beams generated by different frequencies, affecting performance.
Innovation Solution
A base station antenna with a phase dispersion circuit that adjusts the phase slope of electromagnetic signals for radiating elements with horizontal spacing, allowing bidirectional adjustment of beam pointings and improving overlap ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If antenna arrays are arranged more densely in the horizontal direction to increase MIMO capability and multi-frequency support, then the quantity of antenna arrays increases, but the horizontal plane directivity pattern overlap ratio of beams deteriorates
Solution Approach 1:
The patent changes the phase slope parameter of electromagnetic signals fed to radiating elements with horizontal spacing. By adjusting the phase slope differently for elements at different horizontal positions, the beam pointing directions at different frequencies are corrected to improve overlap ratio while maintaining dense array configuration
Solution Approach 2:
The patent introduces dynamic phase adjustment capability through the phase dispersion circuit, allowing the phase slope to be adaptively changed across different frequencies. This enables the antenna system to dynamically compensate for beam squint effects that occur in dense arrays operating across wide frequency bands
Data Source
AI summary
A base station antenna includes a plurality of antenna arrays and a phase dispersion circuit. The plurality of antenna arrays include a plurality of radiating elements, and the plurality of radiating elements include a first radiating element and a second radiating element that have a horizontal spacing. The phase dispersion circuit is configured to adjust a phase slope of an electromagnetic signal of the first radiating element in an operating frequency band and/or a phase slope of an electromagnetic signal of the second radiating element in the operating frequency band.