Wideband Power Amplifier Isolation for 5G Linearity
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Solution Overview
Problem
Power amplifiers in 5G communication systems face challenges in maintaining linearity across wide bands, leading to efficiency drops due to envelope impedance issues, which are difficult to address with existing technologies.
Innovation Solution
A power amplification device is designed with an element, such as a regulator, connected to the power amplifier to reduce envelope impedance, maintaining linearity by supplying power to each stage and ensuring isolation between stages, thereby enabling high power and high linearity even in wideband communication networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a power amplifier is designed for high power in wideband 5G communication systems, then transmission distance and data rate are improved, but linearity deteriorates due to envelope impedance issues
Solution Approach 1:
The patent introduces a decoupling network as an intermediary component between power amplifiers to eliminate envelope impedance coupling effects. This mediator absorbs and isolates the harmful impedance interactions, allowing each power amplifier to operate independently with maintained linearity while achieving high total transmission power through parallel operation.
2Device complexity
If conventional power amplifier structures are used in wideband applications, then device simplicity is maintained, but linearity cannot be maintained across wide frequency bands
Solution Approach 1:
The patent divides the wideband communication system into multiple narrower band power amplifiers operating in parallel, each handling a portion of the total power. The decoupling network segments the impedance interactions between these amplifiers, allowing each to maintain linearity within its operating range while collectively covering the wide frequency band.
3Reliability
If additional capacitors are added to minimize envelope impedance, then linearity is improved, but device size increases
Solution Approach 1:
The decoupling network serves as a compact intermediary structure that provides envelope impedance isolation without requiring large additional capacitors. The network uses carefully designed impedance transformation and coupling elements that achieve the same linearity improvement in a much smaller footprint compared to traditional capacitor-based approaches.
Data Source
AI summary
The method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for internet of things (IoT) are provided. The method includes intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The system includes a power amplification device capable of minimizing the effect of envelope impedance. The power amplification device may be incorporated in a terminal and a base station.