Base Station Antenna Feed Network With Microstrip-Stripline Layout
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Solution Overview
Problem
Conventional base station antenna feed networks face challenges with complex assembly and a large quantity of cables, especially in multi-array configurations, leading to difficulties in layout and increased assembly space requirements.
Innovation Solution
The implementation of a feed network using a stripline cavity structure and microstrip circuit, where the microstrip circuit is on the front surface of the reflecting plate and the stripline cavity structure is on the back surface, with avoidance holes allowing the second conductor strip to pass through for connection, reducing cable quantity and facilitating assembly, and incorporating a phase shifter for phase change functionality within the stripline cavity structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional feed network with phase shifters and coaxial cables is used on the back surface of the reflecting plate, then the antenna can adapt to different array arrangements, but the device arrangement leads to a large quantity of cables, complex assembly, and difficulty in laying out the feed network
Solution Approach 1:
The patent merges the phase shifter and feed network components into an integrated module that is directly mounted on the reflecting plate. This integration eliminates the need for separate coaxial cables and discrete phase shifter assemblies, thereby reducing cable quantity and simplifying the overall feed network structure while maintaining adaptability to different array configurations
Solution Approach 2:
The patent transitions from a three-dimensional cable-based feed network layout to a planar microstrip circuit layout on the reflecting plate surface. By using microstrip transmission lines etched directly on the plate, the feed network is flattened into two dimensions, eliminating cable management issues and simplifying assembly while preserving the ability to adapt to various array arrangements
2Adaptability or versatility
If multiple phase shifters and cables are arranged on the back surface of the reflecting plate, then different array configurations can be supported, but assembly space increases and production becomes more difficult
Solution Approach 1:
The patent combines multiple feed network functions into a single integrated module mounted on the reflecting plate. This module integrates phase shifting, signal distribution, and radiating element connections, eliminating the need for separate cable assemblies and discrete components that would complicate manufacturing and assembly processes
Solution Approach 2:
The patent replaces the mechanical cable-based connection system with an electromagnetic field-based microstrip circuit system. The microstrip transmission lines provide electrical connections through the reflecting plate itself, eliminating the need for physical cable routing and mechanical connectors, thereby greatly simplifying assembly and production
Data Source
AI summary
The present disclosure relates to base station antennas and base stations. One example base station antenna comprises an antenna array, a reflecting plate with a hole, a microstrip circuit comprising a first conductor strip, and a stripline cavity structure comprising a second conductor strip. The microstrip circuit and the stripline cavity structure are respectively located at opposite sides of the reflecting plate. The first conductor strip and the second conductor strip are connected through the hole.