RF Module Layout Shielding for Receiver Sensitivity Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In mobile communication devices, the proximity of transmitter and receiver components in a compact front-end circuit leads to electromagnetic field coupling, causing harmonic components and intermodulation distortion to flow into the receiver, thereby reducing reception sensitivity.
Innovation Solution
A radio frequency module configuration with a module board featuring a conductive member between inductance elements of the transmission and reception matching circuits to prevent electromagnetic field coupling, using a planar layout where the conductive member blocks electromagnetic fields generated by inductors in the transmission and reception paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transmitter and receiver components are arranged in close proximity in a compact front-end circuit, then device integration is improved, but electromagnetic field coupling occurs between inductance components causing harmonic components and intermodulation distortion to flow into the receiver, deteriorating reception sensitivity
Solution Approach 1:
A conductive member is introduced as an intermediary element between the transmission output matching circuit and reception input matching circuit. This conductive member acts as a shield that blocks electromagnetic field coupling between the inductance components of the transmitter and receiver, preventing harmonic components and intermodulation distortion from flowing into the reception path while allowing both circuits to remain in close proximity for integrated design
Solution Approach 2:
The front-end circuit is segmented into distinct transmission and reception regions by positioning the conductive member between the transmission output matching circuit and reception input matching circuit. This segmentation creates electromagnetic isolation zones that prevent harmful field coupling while maintaining overall circuit integration
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 effectively reduces harmonic components and intermodulation distortion, thereby preventing deterioration of reception sensitivity in the radio frequency module and communication device.
Implementation Method 1
a conductive member mounted on the first principal surface is disposed between the first inductance element and the second inductance element
Data Source
AI summary
A radio frequency module includes a module board, a transmission power amplifier, a first inductance element mounted on a first principal surface and connected to an output terminal of the transmission power amplifier, a reception low-noise amplifier, and a second inductance element mounted on a first principal surface connected to an input terminal of the reception low-noise amplifier. In a plan view of the module board, a conductive member mounted on the first principal surface is disposed between the first inductance element and the second inductance element.