RF Module Substrate Segmentation for Noise Suppression
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Solution Overview
Problem
Existing radio frequency modules struggle to sufficiently suppress noise inflow into radio frequency signals, particularly in mobile communication devices supporting multiple frequency bands.
Innovation Solution
A radio frequency module is designed with a module substrate partitioned into regions by a conductive member set to ground potential, featuring a power amplifier, low-noise amplifier, and switch configuration that isolates these components to suppress electromagnetic coupling and noise inflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shield wall is formed to partition mounting regions, then noise intrusion from system portion and power supply circuit portion into radio frequency processing portion is suppressed, but noise inflow into radio frequency signal cannot be sufficiently suppressed
Solution Approach 1:
The module substrate is divided into three distinct regions by conductive members: first region for power amplifier, second region for switch, and third region for low-noise amplifier. This segmentation isolates noise-generating components from sensitive radio frequency processing components, effectively suppressing both noise intrusion and noise inflow into radio frequency signals.
Solution Approach 2:
Conductive members set to ground potential are introduced as intermediary elements between the power amplifier/switch regions and the low-noise amplifier region. These ground potential conductive members act as electromagnetic shields, blocking noise propagation from high-power regions to sensitive RF regions while maintaining electrical isolation.
2Adaptability or versatility
If multiband support is added to mobile communication devices, then communication capability is enhanced, but disposition configuration of circuit elements becomes complicated
Solution Approach 1:
The module substrate is segmented into functionally independent regions (first region for power amplifier, second region for switch, third region for low-noise amplifier). This segmentation provides a systematic layout framework that simplifies the disposition of circuit elements for multiband support, as each region can be independently optimized for different frequency bands without affecting others.
Solution Approach 2:
The conductive members set to ground potential serve multiple functions: they partition the module substrate into distinct regions, provides electromagnetic shielding, establish ground references, and reduce crosstalk. This multi-functionality simplifies the overall design for multiband support by using the same structural elements for multiple purposes.
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
The solution effectively suppresses noise inflow into radio frequency signals, enhancing the electrical characteristics and performance of the radio frequency module in communication devices.
Implementation Method 1
a conductive member to partition the main surface into a first region, a second region, and a third region in a plan view of the main surface, and being set to ground electric potential
Data Source
AI summary
A radio frequency module includes: a module substrate having a main surface; a conductive member to partition the main surface into regions in a plan view of the main surface, and being set to ground electric potential; a switch disposed in one of the regions and connected to an antenna connection terminal; a power amplifier disposed in one of the regions and connected to the antenna connection terminal via the switch; and a low-noise amplifier disposed in one of the regions and connected to the antenna connection terminal via the switch.