Integrated RF Front End Module for Multi-Band Network Functions
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Solution Overview
Problem
Front end modules (FEMs) in RF systems face challenges in reducing size and component count, which affects space and manufacturing costs, especially when integrating multiple frequency bands and network functions like MIMO, diversity, and dual connectivity.
Innovation Solution
Integrating multiple filter and amplifier circuits onto a single die, allowing repurposing of unused filter circuits to implement additional network functions, and sharing infrastructure to increase area efficiency and reduce module size without increasing wafer yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple filter and amplifier circuits are integrated onto a single die to implement additional network functions, then functionality is enhanced, but device complexity increases
Solution Approach 1:
The patent implements additional network functions (MIMO, diversity, dual connectivity) by repurposing existing filter circuits within the FEM. The same filter circuits that implement front end functions are reused to provide filtering for additional network functions, allowing one die to serve multiple purposes without proportionally increasing complexity
Solution Approach 2:
The patent combines multiple filter circuits and amplifier circuits onto a single integrated die. By merging these circuits and sharing common infrastructure (power supply, ground connections, control logic), the patent achieves enhanced functionality while controlling the increase in device complexity through resource sharing
2Quantity of substance
If filter circuits are repurposed to implement additional network functions, then component count decreases, but manufacturing precision requirements increase
Solution Approach 1:
The patent designs filter circuits with universal functionality that can operate in different configurations. The same physical filter circuit can be programmed or switched to provide filtering for front end functions or for additional network functions like MIMO or diversity, reducing the need for separate dedicated circuits while maintaining performance through precise design
3Area of stationary object
If resonators are tiled to increase resonator area to die area ratio, then area efficiency increases, but device complexity increases
Solution Approach 1:
The patent tiles resonators on the die surface in a compact arrangement, effectively nesting multiple resonator structures within the available die area. This allows maximum utilization of the die real estate for resonator placement, achieving high resonator area to die area ratio through systematic spatial arrangement
Solution Approach 2:
The patent employs multi-layer resonator structures and three-dimensional packaging approaches to increase the effective resonator area without proportionally increasing the die footprint. By utilizing vertical stacking and layered configurations, the patent achieves higher area efficiency while managing the complexity through structured design
Data Source
AI summary
A front end radio frequency (RF) module including one or more first filter circuits configured to implement a front end function by filtering first signals communicated between one or more first antenna and a transceiver and one or more second filter circuits configured to implement at least a portion of an additional network function within the front end RF module by filtering second signals communicated between one or more second antennas and the transceiver.