Multi-Band Phase Shifter Assembly With Stacked Filter Layout
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Solution Overview
Problem
The increasing number of frequency bands and functional modules in base station antennas leads to restricted installation and operation space, necessitating improved space utilization.
Innovation Solution
A multi-band phase shifter assembly with a superimposed structure of rotary wiper arm phase shifters and filters on opposite surfaces of a substrate, connected via a conductive structure to reduce width and enhance wiring flexibility, allowing for compact integration and simplified welding operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radiating element arrays for different frequency bands are integrated in the base station antenna, then the multi-band service capability is improved, but the antenna width increases
Solution Approach 1:
The patent transitions from a planar arrangement of phase shifters to a three-dimensional stacked configuration where phase shifters for different frequency bands are arranged on opposite sides of a substrate. This vertical stacking approach allows multiple frequency bands to be integrated without increasing the horizontal width of the antenna, effectively resolving the contradiction between multi-band capability and antenna width.
2Adaptability or versatility
If more functional modules (phase shifters, filters, coaxial cables) are integrated in the base station antenna, then the multi-band functionality is improved, but the installation space and operation space are restricted
Solution Approach 1:
The patent merges multiple functional modules (phase shifters, filters, and coaxial cables) into a compact integrated assembly where components for different frequency bands are combined in a shared space. The phase shifters are mounted on opposite sides of a common substrate, and filters are integrated at strategic locations, reducing the overall installation footprint while maintaining full multi-band functionality.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by placing phase shifters on opposite sides of a substrate and routing coaxial cables through the substrate thickness. This vertical integration approach maximizes the use of available space and maintains adequate operation space for welding and assembly while accommodating all necessary functional modules.
3Adaptability or versatility
If phase shifters for different frequency bands are provided in the multi-band antenna system, then the beam adjustment capability is improved, but the space utilization rate is reduced
Solution Approach 1:
The patent arranges phase shifters for different frequency bands on opposite sides of a substrate in a vertical stacking configuration. This three-dimensional arrangement allows multiple phase shifters to coexist in a compact volume, improving space utilization while maintaining the ability to adjust beams for multiple frequency bands independently.
Data Source
AI summary
A multi-band phase shifter assembly comprises: a first substrate; a first rotary wiper arm phase shifter, configured to phase shift a first RF signal in a first frequency band; a second rotary wiper arm phase shifter, configured to phase shift a second RF signal in a second frequency band; first filters, configured to pass the first RF signal while blocking the second RF signal, the input end of each first filter is connected to a corresponding output port of the first rotary wiper arm phase shifter; second filters, configured to pass the second RF signal while blocking the first RF signal, the input end of each second filter is connected to a corresponding output port of the second rotary wiper arm phase shifter; and a conductive structure, configured to electrically connect one input end of the first filters with one output end of the second filters.