RF Power Amplifier Transformer Layout for Compact Module Integration
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Solution Overview
Problem
Power amplification circuits with transformers tend to increase in size due to the number of constituent components, making them bulky and inefficient for compact applications.
Innovation Solution
A compact radio-frequency module design that incorporates a power amplification circuit with a transformer, where the transformer's primary and secondary coils are strategically arranged on a module substrate with conductive layers surrounding key components, reducing the module's size by optimizing the layout and connections of amplification elements and capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a power amplification circuit includes a transformer with separate components, then power amplification function is achieved, but the module size increases
Solution Approach 1:
The patent merges the transformer coils with the module substrate by forming conductive layers directly on the substrate. The primary coil and secondary coil are integrated into the substrate structure, eliminating the need for separate transformer components and reducing overall module size while maintaining power amplification functionality.
Solution Approach 2:
The patent utilizes the thickness dimension of the module substrate to arrange conductive layers at different levels. By stacking conductive layers in the vertical dimension rather than spreading them out horizontally, the patent achieves three-dimensional integration that reduces the planar footprint and overall module size.
2Power
If multiple amplification elements and transformers are used, then effective power amplification is achieved, but the number of components increases
Solution Approach 1:
The patent combines multiple amplification elements and transformer structures into a unified integrated circuit design. The amplification elements are formed as semiconductor devices within the substrate, and the transformer coils are created as conductive layers patterned on the same substrate, merging what would traditionally be separate discrete components into a single integrated structure.
Solution Approach 2:
The module substrate serves multiple functions simultaneously: it acts as the mechanical support structure, the electrical interconnection medium through conductive layers, the housing for amplification elements, and the integration platform for transformer coils. This multi-functionality reduces the need for additional supporting components.
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
The design achieves a smaller form factor for radio-frequency modules while maintaining effective power amplification, enabling more compact communication devices without compromising performance.
Implementation Method 1
a transformer including a primary coil and a secondary coil
Data Source
AI summary
A radio-frequency module includes a module substrate and a power amplification circuit that includes first to fourth amplification elements, a transformer including primary and secondary coils, an output terminal to which the secondary coil is connected, and a circuit component disposed on the module substrate. Output terminals of the first and third amplification elements and output terminals of the second and fourth amplification elements are respectively connected to a first terminal and a second terminal of the primary coil. A capacitor is connected to a wiring line path connected between the output terminal of the first amplification element and the first terminal of the primary coil and to a wiring line path connected between the output terminal of the second amplification element and the second terminal of the primary coil. The primary or secondary coil includes a conductive layer surrounding at least part of the circuit component.