RF Front-End Stack Integration for Low-Height Signal Routing
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Solution Overview
Problem
Existing RF front-end modules in devices face challenges in miniaturization, particularly in the z-direction, due to the need for discrete components and inefficient signal transition, which increases system height and manufacturing costs, while also requiring mechanical robustness and electromagnetic reliability.
Innovation Solution
An RF module is designed with a stack comprising electrically conductive and insulating layers, integrating RF front-end functionalities both embedded and surface-mounted within the stack, using a component carrier like a printed circuit board or IC substrate, allowing for compact, robust, and flexible signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If discrete components are used for RF front-end functionalities, then device functionality is achieved, but system height increases
Solution Approach 1:
The patent integrates multiple discrete RF front-end components (filters, amplifiers, switches, duplexers, multiplexers, converters) into a single multi-die package, merging their functionalities while reducing the overall system height by eliminating the need for separate surface-mounted components
Solution Approach 2:
The patent transitions from a two-dimensional surface-mounted arrangement to a three-dimensional stacked architecture, arranging components vertically within a multi-die package to reduce the horizontal footprint and overall system height
2Adaptability or versatility
If more electronic components are mounted on component carriers, then device functionality increases, but heat removal becomes increasingly difficult
Solution Approach 1:
The patent embeds multiple electronic components within a multi-die package structure, nesting them in a hierarchical arrangement that allows for integrated thermal management while maintaining high component density and functionality
Solution Approach 2:
The patent introduces thermal management structures as intermediary elements between the electronic components and the external environment, facilitating efficient heat transfer and removal while the components are integrated within the compact multi-die package
3Ease of manufacture
If externally assembled front-end modules are used, then manufacturing is simplified, but signal transmission quality deteriorates
Solution Approach 1:
The patent combines multiple RF front-end components into a single integrated multi-die package with internal interconnections, eliminating the need for external assembly and reducing signal transmission losses while maintaining manufacturing efficiency through modular packaging
Data Source
Figure 1~4
AI summary
There is described a radio frequency, RF, module (100), comprising: i) a stack (101) comprising at least one electrically conductive layer structure (104) and/or at least one electrically insulating layer structure (102); and ii) a RF front-end functionality (115) that is integrated in the stack (101). Further, an RF arrangement, a manufacture method and a use are described.