Dual Power Amplifier RF Circuit for Wideband 5G Transmission
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Solution Overview
Problem
The increased channel bandwidth in 5G NR communication systems leads to a decrease in signal-to-noise ratio and a higher load on power amplifiers, as the difference between peak and average power of radio frequency signals increases, especially when multiple signals are amplified simultaneously.
Innovation Solution
A radio frequency circuit with two power amplifiers, one for each signal, that selectively amplifies signals based on their bandwidth, allowing the first power amplifier to handle broader bandwidths and the second to handle narrower bandwidths, thereby reducing the overall load on the power amplifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a broader channel bandwidth is selected to increase data transmission capacity, then the channel bandwidth is improved, but the signal-to-noise ratio decreases and the load on the power amplifier increases
Solution Approach 1:
The patent divides the amplification task into two separate power amplifiers (first power amplifier and second power amplifier) that operate on different radio frequency signals with different frequencies. This segmentation allows each amplifier to handle a portion of the total bandwidth independently, maintaining signal quality while supporting broader aggregate bandwidth for high data transmission capacity
2Productivity
If a broader channel bandwidth is selected to increase data transmission capacity, then the channel bandwidth is improved, but the load on the power amplifier increases
Solution Approach 1:
The patent segments the power amplification function across two independent power amplifiers, each handling a separate radio frequency signal. This distribution of amplification load prevents any single amplifier from becoming overloaded, enabling the system to support broader channel bandwidths without excessive power amplifier stress
3Productivity
If multiple radio frequency signals are simultaneously amplified to increase data transmission capacity, then the channel bandwidth is improved, but the load on the power amplifier further increases due to increased difference between peak power and average power
Solution Approach 1:
The patent assigns different radio frequency signals with different frequencies to separate power amplifiers (first power amplifier for first radio frequency signal, second power amplifier for second radio frequency signal). This segmentation isolates the peak-to-average power ratio characteristics of each signal, preventing cumulative load increases that would occur if multiple signals were amplified by a single power amplifier
Data Source
AI summary
A radio frequency circuit includes: a first power amplifier capable of amplifying a first radio frequency signal and a second radio frequency signal each having a different frequency; and a second power amplifier capable of amplifying the second radio frequency signal. In a case where the first radio frequency signal and the second radio frequency signal are simultaneously transmitted, (i) under a condition that a sum of a bandwidth of the first radio frequency signal and a bandwidth of the second radio frequency signal is broader than or equal to a predetermined bandwidth, the first radio frequency signal is amplified by the first power amplifier, and the second radio frequency signal is amplified by the second power amplifier, and (ii) under a condition that the sum is narrower than the predetermined bandwidth, the first radio frequency signal and the second radio frequency signal are amplified by the first power amplifier.