RF Module Shield Layout for Transmission Filter Temperature Sensing
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Solution Overview
Problem
The temperature of a transmission filter in radio frequency modules cannot be measured, making it difficult to suppress deterioration and/or failure due to heat.
Innovation Solution
A radio frequency module design that includes a transmission filter in contact with a metal shield, along with an integrated circuit containing a temperature sensor, covered by resin members, allowing for improved temperature measurement and control of the transmission filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is placed in the integrated circuit to measure the power amplifier temperature, then the power amplifier temperature can be monitored, but the transmission filter temperature cannot be measured and heat-related deterioration cannot be suppressed
Solution Approach 1:
The patent introduces a metal shield as an intermediary thermal conduction path between the transmission filter and the integrated circuit's temperature sensor. The metal shield is in contact with both the transmission filter and the integrated circuit, enabling indirect temperature measurement of the transmission filter through the integrated circuit's existing temperature sensor, thus resolving the inability to measure transmission filter temperature without adding a separate sensor
2Object-affected harmful factors
If the transmission filter is covered with resin members for protection, then the filter is protected from environmental factors, but heat dissipation is reduced and temperature measurement becomes more difficult
Solution Approach 1:
The metal shield serves as a thermal intermediary that conducts heat from the transmission filter (through which resin members pass) to the integrated circuit's temperature sensor. This allows the resin members to provide environmental protection while the metal shield maintains thermal conduction paths for temperature measurement and dissipation
Solution Approach 2:
The patent implements a nested structure where the metal shield is positioned within the resin member coverage area. The resin members cover the transmission filter and part of the metal shield, while the metal shield maintains contact with both the transmission filter and the integrated circuit, creating a nested arrangement that provides both protection and thermal management
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 enhances the measurement accuracy and response time of the transmission filter's temperature, thereby suppressing deterioration and failure due to heat.
Implementation Method 1
The transmission filter and the integrated circuit are in contact with the metal shield
Data Source
AI summary
A radio frequency module includes a module substrate, a transmission filter disposed on the module substrate, an integrated circuit that is disposed on the module substrate and includes a temperature sensor, resin members that at least partly cover the transmission filter and the integrated circuit, and a metal shield that at least partly covers surfaces of the resin member. The transmission filter and the integrated circuit 81 are in contact with the metal shield.