Magnetically Coupled Signal Transforming Circuit for RF Power Combining
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Solution Overview
Problem
Existing power combiners and distributors in RF transceiving systems occupy large chip or board area, require high DC power, and dissipate significant heat, while also facing inefficiencies and linearity issues in wireless communications and RF applications.
Innovation Solution
A signal processing apparatus comprising a first and second signal transforming circuit with magnetically coupled lines, capable of acting as both a power combiner and distributor, utilizing symmetrical configurations to achieve impedance matching and reduce signal loss through vector sum and differential signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple amplifier cells are combined to produce required output power, then power output capability is improved, but device complexity and chip/board area increase
Solution Approach 1:
The patent combines multiple amplifier cells into a unified power amplifier device with integrated power combining circuitry. The power combining network merges outputs from multiple amplifier cells while maintaining compact layout, reducing the overall device complexity compared to separate amplifier implementations. This merging approach achieves high power output capability without proportionally increasing device complexity.
2Power
If multiple amplifier cells are combined to produce required output power, then power output capability is improved, but chip or board area occupied increases
Solution Approach 1:
The patent implements a nested structure where power combining circuitry is integrated within the amplifier device footprint. The power combining network is positioned to utilize space efficiently, with signal paths and combining elements nested within the overall device boundary. This nesting approach allows multiple amplifier cells to be combined while minimizing the total chip or board area occupied.
Solution Approach 2:
The patent employs three-dimensional integration techniques where power combining circuitry is arranged in multiple layers or vertical stacks. By transitioning from planar to spatial arrangement, the device achieves high power output capability without proportionally increasing the two-dimensional chip or board area. The power combining network utilizes vertical space and multi-layer routing to reduce footprint.
3Power
If high DC power is supplied to power amplifiers, then power output capability is improved, but heat dissipation increases
Solution Approach 1:
The patent introduces heat dissipation management circuitry as an intermediary between the power amplifiers and the environment. Thermal management elements such as heat sinks, thermal vias, or active cooling mechanisms are integrated into the device structure to efficiently transfer and dissipate heat generated by high DC power operation. This intermediary approach enables high power output while controlling harmful heat dissipation effects.
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 solution enables efficient signal combination and distribution with reduced signal loss and increased linearity, allowing for compact and high-power RF signal processing with improved efficiency and reduced heat dissipation.
Implementation Method 1
each second coupled line is magnetically coupled to two of the first coupled lines in parallel and comprises two signal ports, to which the two ends of each of the magnetically-coupled first coupled lines are placed symmetrically for transferring a second pair of differential signals
Data Source
AI summary
The signal processing apparatus contains a first signal transforming circuit and a second signal transforming circuit. The first signal transforming circuit includes four first coupled lines and two second coupled lines, wherein two ends of each first coupled line are configured to carry a first pair of differential signals respectively, each second coupled line is magnetically coupled to two of the first coupled lines in parallel and comprises two signal ports, to which the two ends of each of the magnetically-coupled first coupled lines are placed symmetrically for transferring a second pair of differential signals. The second signal transforming circuit is configured to convert between the second pairs of differential signals at the signal ports and a third pair of differential signals at connecting ports of the second signal transforming circuit.