Multiband Power Amplifier Switching for PCB Space-Constrained RFFE
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Solution Overview
Problem
The integration of multimode multiband power amplifiers in electronic devices for supporting various communication standards like 2G, 3G, 4G, and 5G within limited space and cost constraints exacerbates the complexity of PCB layout and wiring, leading to inefficiencies and increased costs due to the need for additional components and inflexible power supply and signal switching.
Innovation Solution
A multimode multiband power amplifier (MMPA) with integrated MB and LB signal transmitting channels, featuring switchable connections and power supply options, allowing flexible selection of input channels and power sources to support different network combinations, reducing waste and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multimode multiband power amplifier is added to support ENDC, then communication capability is improved, but PCB space and wiring complexity increase
Solution Approach 1:
The patent combines multiple power amplifier functions (2G, 3G, 4G, 5G support) into a single integrated multimode multiband power amplifier module, merging what would traditionally require separate components into one unified unit that occupies less PCB space while maintaining full communication capability across multiple standards
Solution Approach 2:
The power amplifier module is designed with multi-functionality to support multiple communication modes and frequency bands simultaneously, allowing a single component to perform the work of multiple dedicated amplifiers, thereby reducing overall PCB area requirements
2Reliability
If traditional separate power amplifiers are used for each frequency band, then signal amplification is reliable, but device complexity and cost increase
Solution Approach 1:
Multiple independent power amplifier circuits for different frequency bands are merged into a single integrated module with shared components such as power supply circuits, control logic, and packaging structure, reducing the total number of discrete components while maintaining reliable signal amplification across all bands
Solution Approach 2:
The power amplifier module incorporates universal design elements that enable it to handle multiple frequency bands and communication standards through a single unified architecture, eliminating the need for separate dedicated amplifiers for each band and thereby reducing device complexity
3Stability of the object's composition
If fixed power supply connections are used, then power supply stability is maintained, but adaptability to different network configurations is reduced
Solution Approach 1:
The power amplifier module incorporates dynamic switching mechanisms that allow the power supply connections and signal paths to be reconfigured based on the active communication mode and frequency band, enabling the system to adapt to different network configurations while maintaining stable power delivery through controlled switching rather than fixed rigid connections
Data Source
AI summary
A multimode multiband power amplifier (MMPA), a switching method for a MMPA, and a radio frequency front-end (RFFE) device. The MMPA includes: a mid-band (MB) signal transmitting channel, configured to amplify an MB radio-frequency signal input by the radio frequency (RF) Transceiver and output the amplified MB radio-frequency signal, and a low-band (LB) signal transmitting channel, configured to amplify a LB radio-frequency signal input by the RF Transceiver and output the amplified LB radio-frequency signal. The MB signal transmitting channel includes a first switch, and is configured to be connected to a first MB output channel and a second MB output channel of the RF Transceiver through the first switch respectively. The LB signal transmitting channel includes a second switch, and is configured to be connected to a first LB output channel and a second LB output channel of the RF Transceiver through the second switch respectively.