Communication Module Terminal Commonalization via Passive Matching Circuit
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Solution Overview
Problem
The complexity of wiring patterns in multi-band wireless communication devices increases with the number of receiving filters and duplexers, making it difficult to cover multiple frequency bands efficiently, especially with acoustic wave filters, and requiring multiple power amplifiers and low noise amplifiers.
Innovation Solution
A communication module design that uses a passive matching circuit to commonalize receiving terminals of multiple filters, allowing for reduced number of receiving terminals and simplified wiring by connecting multiple filters to a single low noise amplifier, while maintaining effective frequency band coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple receiving filters are provided to cover multiple frequency bands, then frequency band coverage is improved, but wiring pattern complexity increases
Solution Approach 1:
The patent merges multiple receiving terminals into a single common receiving terminal by introducing a switching mechanism. The switching unit selectively connects the common receiving terminal to different receiving filters based on the desired frequency band, thereby combining multiple terminal functions into one physical terminal and simplifying the wiring pattern.
Solution Approach 2:
The common receiving terminal is designed to serve multiple frequency bands through the switching mechanism. Instead of having dedicated terminals for each frequency band, a single universal terminal is created that can be dynamically connected to different receiving filters,实现多频段覆盖的同时减少接线复杂度。
2Adaptability or versatility
If multiple receiving terminals are used for multiple filters, then frequency band coverage is improved, but the number of amplifiers required increases
Solution Approach 1:
The patent combines multiple amplifier functions into a single low noise amplifier by using the switching unit to selectively connect different receiving filters to the same amplifier input. This allows one amplifier to serve multiple frequency bands, reducing the total number of amplifiers required while maintaining full frequency band coverage.
Solution Approach 2:
The low noise amplifier is designed as a universal amplifier that can process signals from multiple frequency bands. Through the switching mechanism, a single amplifier is made multi-functional, capable of amplifying signals from different receiving filters corresponding to different frequency bands, thereby reducing the quantity of amplifiers needed.
3Device complexity
If receiving terminals are commonalized through a passive circuit, then wiring complexity is reduced, but signal attenuation may increase
Solution Approach 1:
The patent introduces a switching unit as an intermediary component between the receiving filters and the common receiving terminal. This switching mechanism minimizes signal path length and impedance mismatches compared to passive resistive circuits, thereby reducing signal attenuation while achieving terminal commonalization and wiring simplification.
Data Source
AI summary
A communication module includes: a plurality of receiving filters that are connected between an antenna terminal and a receiving terminal and have a receive band different from each other; and a passive circuit that is commonly connected to at least two of the plurality of receiving filters and makes a receive band of one of said at least two of the plurality of receiving filters suppressed when making another receive band of said at least two of the plurality of receiving filters transitable, wherein receiving terminals of said at least two of the plurality of receiving filters are commonalized through the passive circuit.