Multi-Stage GaN Amplifier Package With Opposed Stage Layout
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Solution Overview
Problem
Conventional three-stage amplifier systems for wireless infrastructure applications have a large footprint, reduced design flexibility, and are limited in frequency applications due to separate packages and fixed architectures using LDMOS amplifiers.
Innovation Solution
A multi-stage amplifier package with two amplification stages aligned in opposite directions, utilizing GaN transistors and out-of-package impedance matching circuitry, allowing for flexible amplifier class configurations and reduced footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional three-stage amplifier systems are used to achieve at least 45 dB of gain, then the required amplification performance is achieved, but the footprint becomes relatively large
Solution Approach 1:
The patent combines multiple amplification stages (first amplification stage with first amplifier, second amplification stage with second and third amplifiers) into a single integrated amplifier package. This merging of previously separate amplifier circuits into one compact package reduces the overall footprint while maintaining the required 45 dB amplification gain through the cascaded stage architecture.
Solution Approach 2:
The patent arranges amplifiers in opposite directional alignments (first amplifier in first direction, second and third amplifiers in second direction opposite to first) within the package. This spatial arrangement optimizes the internal layout to minimize the package footprint while maintaining proper signal flow and electrical connections between stages.
2Adaptability or versatility
If conventional amplifier circuits are used, then amplification function is provided, but design flexibility is reduced
Solution Approach 1:
The patent enables flexible amplifier class configurations by allowing different amplifier types (e.g., Class A, Class B, Class AB, Class C) to be implemented in each amplification stage. This dynamic configurability allows the same physical package to be adapted for different application requirements, enhancing design flexibility without increasing device complexity.
3Adaptability or versatility
If LDMOS amplifiers with fixed architectures are used, then manufacturing simplicity is maintained, but frequency application range is limited
Solution Approach 1:
The patent extends frequency application range from conventional LDMOS limitations to operate from less than 1.0 GHz to around 3.5 GHz by implementing GaN transistor devices. This parameter change in transistor technology enables broader frequency coverage while maintaining ease of manufacture through standardized GaN device fabrication processes.
Data Source
AI summary
An amplifier device may include at least one two-stage amplifier package, where an amplifier of a first amplification stage of the amplifier package may be aligned opposite to amplifiers of a second amplification stage of the amplifier package. The amplifier device may be a three-stage amplifier device, where the second stage of the two-stage amplifier package is coupled to amplifiers of a final (third) stage, which may be in a Doherty configuration. The amplifiers of the second stage may be arranged in any of a class AB configuration, a Doherty configuration, a multi-stage Doherty configuration (with amplifiers of the final amplification stage), or a multi-driver, multi-stage Doherty configuration. One or more passive components used for inter-stage impedance matching may be disposed outside of the two-stage amplifier package. Amplifiers of the first, second, and third amplification stages may each be gallium nitride (GaN) amplifiers, in some embodiments.