Duplexer Module Terminal Segmentation for Isolation
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Solution Overview
Problem
Existing duplexer modules with multiple frequency bands suffer from degraded isolation characteristics and insertion loss due to complex wiring patterns when transmission and reception terminals are adjacently arranged on a wiring board.
Innovation Solution
A duplexer module design where transmission and reception filters for different frequency bands share common input or output terminals, simplifying the wiring pattern and reducing the number of terminals, thereby improving electrical characteristics and eliminating the need for switches connected to power amplifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple transmission terminals and multiple reception terminals are adjacently arranged on the wiring board, then the wiring pattern can be simplified, but the wiring pattern becomes lengthened and complicated which degrades isolation characteristics and insertion loss
Solution Approach 1:
The patent divides the terminals into two distinct groups: transmission terminals (Tx1, Tx2) arranged adjacently on one side of the wiring board, and reception terminals (Rx1, Rx2) arranged adjacently on the opposite side. This segmentation allows each group to be simplified independently while maintaining proper isolation between transmission and reception functions, resolving the contradiction between wiring simplification and electrical performance.
2Adaptability or versatility
If multiple duplexers are provided on the wiring board, then multiple frequency bands can be supported, but the wiring pattern becomes more complex and the size of the duplexer module increases
Solution Approach 1:
The patent designs the wiring board with universal terminal arrangements where transmission terminals and reception terminals are grouped by function rather than by individual duplexer unit. This multi-functional arrangement allows the same wiring pattern structure to support multiple frequency bands and communication systems, reducing overall complexity while maintaining versatility.
Data Source
AI summary
A duplexer module that is used for transmission and reception of a signal in at least two communication systems using different frequency bands includes a wiring board, dual transmission filters in a transmission filter unit that is provided on the wiring board and that includes a transmission filter, and dual reception filters in a reception filter unit that is provided on the wiring board and that includes a reception filter. Each of the dual reception filters includes at least two reception filters having different frequency bands, and the output side of the reception filters is shared between the reception filters such that a common output terminal is provided for the reception filters.