Multiplexer Common Port Feeding Structure for Multi-Band Isolation
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Solution Overview
Problem
Existing multi-band antenna systems face challenges in simultaneously supporting multiple wireless communication services with different frequency bands due to complex and costly manufacturing processes, particularly in adjusting phase control and minimizing interference between filters.
Innovation Solution
A multiplexer with a common port feeding structure featuring a coupling unit with a rod-shaped conductive bar and spaced-apart feeding members, along with band-pass filter units and input/output connectors, allows for simultaneous use of multiple wireless communication services by simplifying the coupling structure and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-band antenna system uses multiple separate antenna ports for different frequency bands, then each wireless communication service can be supported independently, but the device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent combines multiple antenna ports into a single common port structure. The multiplexer integrates multiple band-pass filters and switching networks that share a common antenna connection point, allowing multiple frequency bands to be routed through one physical antenna interface rather than requiring separate antenna ports for each service
Solution Approach 2:
The common port structure serves multiple functions by handling different frequency bands and wireless communication services through a single antenna interface. The multiplexer's switching network enables this universal port to dynamically connect to different filter banks depending on the active service, making the antenna system multi-functional
2Reliability
If traditional multiplexer designs use complex coupling structures between antenna ports and filter banks, then frequency band isolation can be achieved, but the manufacturing precision requirements and production costs increase
Solution Approach 1:
The patent introduces a switching network as an intermediary component between the common antenna port and the filter banks. This switching mechanism provides a controlled interface that maintains frequency isolation while eliminating the need for complex adjustable phase control structures, as the switching action itself provides the necessary signal routing and isolation
3Adaptability or versatility
If multiple separate antenna ports and filter assemblies are used for different frequency bands, then each service can be optimized independently, but the manufacturing process complexity and production time increase
Solution Approach 1:
The patent segments the multiplexer into modular functional blocks including multiple filter banks, a switching network, and a common port interface. Each filter bank can be designed and manufactured as a separate module, then assembled into the complete multiplexer, enabling independent optimization of each service while maintaining manufacturing efficiency through modular assembly
Solution Approach 2:
The patent merges multiple antenna ports into a single common port and integrates multiple filter banks into one unified multiplexer structure. This consolidation reduces the total number of separate components that need to be manufactured and assembled, thereby improving productivity while maintaining multi-service capability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables efficient simultaneous use of multiple wireless communication services using one antenna, simplifies the manufacturing process, and minimizes interference between filters, thereby increasing productivity and reducing costs.
Implementation Method 1
a plurality of band-pass filter units mounted inside the housing to transmit wireless signals at between the antenna connector and the input/output connector to pass a specific frequency band
Implementation Method 2
a coupling unit having a plurality of feeding members to couple the antenna connector and each of the plurality of band-pass filter units
Data Source
AI summary
A multiplexer with a common port feeding structure is disclosed. The multiplexer with a common port feeding structure of the present invention comprises: a housing comprising an antenna connector connected to an antenna for bidirectional transmitting and receiving and a plurality of input/output connectors bidirectionally inputting and outputting a specific frequency band of wireless signals which are input/output through the antenna; a plurality of band-pass filter units mounted inside the housing to transmit wireless signals at between the antenna connector and the input/output connector to pass a specific frequency band; and a coupling unit having a plurality of feeding members to couple the antenna connector and each of the plurality of band-pass filter units.