Integrated Power Amplifier Switching for Compact Multi-Band RFFE
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Solution Overview
Problem
The complexity of radio frequency front end (RFFE) circuits in electronic devices, particularly those supporting multiple transmissions, leads to increased physical size and cost due to the complexity of the structure required for processing radio frequency (RF) signals.
Innovation Solution
The proposed solution involves a power amplifier configuration with multiple amplification circuits, transformers, switches, and a power combiner, controlled by a processor to optimize signal processing and reduce complexity, allowing for efficient handling of single and multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transmission functions are supported to enable transmission of multiple RF signals, then communication versatility is improved, but device complexity and physical area increase
Solution Approach 1:
The patent combines multiple transmission paths into a single integrated RFFE structure. Multiple power amplifiers and RF switches are integrated within one RFFE module, allowing multiple RF signals to be processed through a unified architecture rather than requiring separate processing chains for each transmission.
Solution Approach 2:
The RFFE is designed with multi-functional components that can handle multiple transmission tasks. The RF switches can dynamically connect different input signals to different output paths, and the power amplifiers can process various frequency bands, enabling the same hardware structure to serve multiple communication functions.
2Adaptability or versatility
If multiple transmission functions are supported to enable transmission of multiple RF signals, then communication versatility is improved, but physical area occupied by RFFE increases
Solution Approach 1:
The patent merges multiple transmission functions into a compact integrated RFFE module. By combining power amplifiers, RF switches, and signal processing circuits into a single integrated structure, the physical footprint is reduced compared to having separate modules for each transmission function.
Solution Approach 2:
The patent utilizes vertical integration and three-dimensional packaging techniques to arrange multiple transmission components in stacked or layered configurations. This allows multiple RF signal paths to be accommodated within a smaller planar area by exploiting the vertical dimension.
3Adaptability or versatility
If complex RFFE structure is used to support multiple transmissions, then communication functionality is improved, but manufacturing cost increases
Solution Approach 1:
The patent integrates multiple transmission functions into a single RFFE module that can be manufactured as one unified component. This integration reduces the number of separate parts that need to be sourced, assembled, and tested, thereby lowering manufacturing costs despite the enhanced functionality.
Solution Approach 2:
The RFFE employs universal components that can handle multiple frequency bands and transmission modes. By using standardized multi-functional building blocks rather than dedicated components for each function, the bill of materials is reduced and manufacturing processes are simplified.
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 reduces the physical size and complexity of the RFFE, enabling efficient signal processing and transmission across various frequency bands while maintaining performance, thereby minimizing the overall size and cost of electronic devices.
Implementation Method 1
a first transformer disposed on the first electrical path between the first amplification circuit and the at least one antenna... The first transformer may be configured to maintain a phase of the first output signal... and wherein the second transformer is configured to invert a phase of the second output signal
Data Source
AI summary
An electronic device includes: at least one antenna; and a power amplifier electrically connected to the at least one antenna. The power amplifier includes: a first amplification circuit; a first transformer; a first switch; a second amplification circuit; a second transformer; a second switch; the power combiner; and the third switch configured to electrically connect at least one of the first switch, the second switch, or an output port of the power combiner with the at least one antenna.