Stacked RF Power Amplifier Module for Compact Multiband Front Ends
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Solution Overview
Problem
Conventional radio frequency front-end modules are complex and lack miniaturization, making them less efficient in multiband technologies.
Innovation Solution
A radio frequency module with stacked semiconductor devices containing power amplifiers for different communication bands and a control circuit, which are disposed on a module board to reduce size and noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional front-end modules use complex arrangement configurations for multiband technologies, then communication functionality is improved, but module size increases
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement of circuit components to a three-dimensional stacked configuration. Multiple semiconductor devices are vertically stacked on the module board, utilizing the z-axis dimension to reduce the footprint area while maintaining all necessary multiband communication functions.
Solution Approach 2:
The patent implements a nested structure where multiple semiconductor devices containing different power amplifiers are stacked one on top of another. The control circuit is nested within this stacked arrangement, with each layer serving specific communication bands, thereby consolidating multiple functions into a compact vertical structure.
2Adaptability or versatility
If multiple power amplifiers for different bands are arranged in a conventional manner, then multiband signal processing capability is improved, but noise interference and heat-related risks increase
Solution Approach 1:
The patent extracts and separates the control circuit into an independent semiconductor device, isolating it from the power amplifiers. This separation reduces noise interference from the control circuit affecting the power amplifiers and facilitates independent thermal management for each component type.
Solution Approach 2:
The patent segments the front-end module into multiple independent semiconductor devices, each containing specific power amplifiers for different communication bands. This segmentation allows for independent thermal management and noise isolation for each band's signal processing path.
3Area of stationary object
If circuit components are integrated in a package, then miniaturization is partially achieved, but further size reduction is limited by conventional packaging constraints
Solution Approach 1:
The patent resolves the packaging constraint by utilizing vertical stacking in the third dimension rather than attempting to further compress components in the planar area. This approach achieves additional miniaturization without proportionally increasing arrangement complexity, as the stacking configuration is more straightforward than complex lateral interconnections.
Data Source
AI summary
A radio frequency module includes: a module board; a first semiconductor device containing a first power amplifier and a second power amplifier, the first power amplifier being configured to amplify a radio frequency signal of a first communication band, the second power amplifier being configured to amplify a radio frequency signal of a second communication band, the second communication band being different from the first communication band; and a second semiconductor device containing a control circuit configured to control the first power amplifier and the second power amplifier. In the radio frequency module, the first semiconductor device and the second semiconductor device are stacked together and disposed on the module board.