High Frequency Module Diplexer Capacitor Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high frequency modules for wireless LANs face challenges in maintaining favorable passing characteristics for both transmission and reception signals across multiple frequency bands due to the influence of capacitors used to block direct current control signals, which complicates the design and performance of diplexers.
Innovation Solution
The high frequency module incorporates a switch circuit connected to multiple diplexers, each with dedicated capacitors to block direct currents and band-pass filters, allowing for independent optimization of signal paths for different frequency bands, and uses a layered substrate with resonant circuits to reduce size and improve performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If capacitors are added to block direct current control signals in existing high frequency modules, then the control signal transmission is improved, but the passing characteristics of transmission and reception signals across multiple frequency bands deteriorate
Solution Approach 1:
The invention divides the capacitor blocking function into separate capacitors for each diplexer (first capacitor for first diplexer, second capacitor for second diplexer). This segmentation allows independent optimization of each signal path's passing characteristics while maintaining control signal blocking, resolving the contradiction between reliable control transmission and favorable signal passing characteristics.
Solution Approach 2:
The invention applies different capacitor configurations to different parts of the system - each diplexer has its own dedicated capacitor with optimized capacitance value for its specific frequency band requirements. This local optimization enables each signal path to maintain favorable passing characteristics while still blocking control signals effectively.
2Adaptability or versatility
If multiple diplexers are used to process signals in multiple frequency bands, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The invention makes each diplexer multi-functional by enabling it to process both transmission signals and reception signals across different frequency bands through the selective connection controlled by the switch circuit. This universality allows the system to handle multiple frequency bands (improving adaptability) without proportionally increasing the number of dedicated filters for each function.
Solution Approach 2:
The invention introduces a dynamic switch circuit that selectively connects either the first diplexer or the second diplexer to the antenna terminal based on the required frequency band and signal type (transmission or reception). This dynamic switching capability enables flexible multi-frequency band processing while keeping the overall filter count manageable, as only one diplexer is active at a time for a given signal path.
3Manufacturing precision
If dedicated capacitors are provided for each diplexer to block direct currents, then the passing characteristics for each path are improved, but the device complexity increases
Solution Approach 1:
The invention extracts the direct current blocking function from a shared capacitor configuration and assigns it to dedicated capacitors for each diplexer. This extraction allows each capacitor to be independently optimized for its specific diplexer's frequency band requirements, improving passing characteristics. While the number of capacitors increases, the modular nature of this configuration actually simplifies the design process and enables independent optimization without affecting other parts of the system.
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
This configuration enables the module to process signals in multiple frequency bands with improved passing characteristics for each path, reducing the number of filters required and the module's size, while preventing electromagnetic interference and achieving desired frequency characteristics.
Implementation Method 1
a first capacitor that is provided between the node and the first filter and that blocks passage of direct currents resulting from the control signal; and a second capacitor that is provided between the node and the second filter and that blocks passage of direct currents resulting from the control signal
Implementation Method 2
a first filter that is provided between the first and second ports and that allows signals in the first frequency band to pass; and a second filter that is provided between the first and third ports and that allows signals in the second frequency band to pass
Data Source
AI summary
A high frequency module comprises a switch circuit connected to two antenna terminals and two diplexers connected to the switch circuit. Each of the diplexers incorporates two band-pass filters (BPFs). Each of the diplexers further incorporates a capacitor provided between one of the BPFs and a node of signal paths and another capacitor provided between the other of the BPFs and the node.