RF Power Amplifier Pallet Coupled Line Waveguide
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Solution Overview
Problem
RF power amplifier pallets face challenges in scaling power delivery without increasing the size of the coin, which is costly and results in issues with via self-inductance and overheating at higher powers.
Innovation Solution
The RF power amplifier pallet incorporates a coupled line coupler and a dielectric filled waveguide with metal wall segments, which electromagnetically couples the line segments and provides a higher impedance conversion, reducing the need for larger vias and minimizing overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the size of the coin is increased to deliver higher power, then the power delivery capability is improved, but the cost increases and via self-inductance issues worsen
Solution Approach 1:
The patent replaces the traditional mechanical/electrical via connection system with an electromagnetic waveguide transmission system. Instead of increasing via size to handle higher power, the invention uses waveguide modes (TE10, TE20, TE01) to transmit RF energy, substituting the direct conductive path with an electromagnetic field-based transmission mechanism that avoids via self-inductance limitations.
Solution Approach 2:
The invention changes the fundamental parameter of power transmission from conductive current flow through vias to electromagnetic wave propagation in a waveguide structure. This parameter change allows power delivery scaling without the quadratic increase in via size and associated self-inductance problems that plague traditional designs.
2Power
If the size of the coin is increased to deliver higher power, then the power delivery capability is improved, but overheating issues worsen
Solution Approach 1:
The patent replaces the thermal management challenge of large coin structures with an electromagnetic waveguide system that naturally distributes power delivery across multiple walls and modes, reducing localized thermal stress and eliminating the overheating issues associated with scaled-up via structures.
3Power
If larger vias are used to handle higher power, then the power handling capability is improved, but via self-inductance issues worsen
Solution Approach 1:
The invention completely substitutes the via-based current return path with an electromagnetic waveguide mode system. The waveguide walls carry the RF energy through electromagnetic fields rather than conductive currents, eliminating via self-inductance entirely and allowing scalable power handling without the parasitic inductance problems that limit via-based designs.
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
This configuration allows for easier power scaling without addressing self-inductance issues and provides shielding against electromagnetic radiation, reducing overheating and costs associated with larger coin sizes.
Implementation Method 1
a coupled line coupler comprising a first line segment and a second line segment that is electromagnetically coupled to the first line segment
Implementation Method 2
a dielectric filled waveguide with metal wall segments, which electromagnetically couples the line segments and provides a higher impedance conversion, reducing the need for larger vias and minimizing overheating
Data Source
AI summary
An example embodiment relates to a radiofrequency (RF) power amplifier pallet, and further relates to an electronic device that includes such a pallet. The RF power amplifier pallet may include a coupled line coupler that includes a first line segment and a second line segment that is electromagnetically coupled to the first line segment. A first end of the first line segment may be electrically connected to an output of an RF amplifying unit. The RF power amplifier pallet may further include a dielectric filled waveguide having an end section of the first dielectric substrate, an end section of the second dielectric substrate, and a plurality of metal wall segments covering the end sections of the first and second dielectric layers. The plurality of metal wall segments may be arranged spaced apart from the first line segment and electrically connected to a first end of the second line segment.