Cascaded Power Divider Impedance Matching in Reduced Area
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Solution Overview
Problem
Conventional power dividers have a large area due to the long signal lines required, which increases loss and occupies a significant space, making them unsuitable for miniaturization and integration in modern communication systems.
Innovation Solution
A power divider with a cascade structure of M power division units, each with one input port and two output ports, where the input impedance of each unit conjugate-matches the output impedance of the previous unit, and the output impedance conjugate-matches the load impedance, allowing for flexible impedance matching and reduced signal line lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Wilkinson power dividers use one-quarter wavelength microstrip lines for impedance transformation, then port matching is achieved, but the device occupies large area and increases transmission loss
Solution Approach 1:
The patent changes the impedance transformation mechanism from relying on fixed one-quarter wavelength microstrip lines to using adjustable impedance transformation units. These units can transform impedance through variable electrical parameters (such as transformer turns ratios or adjustable capacitor/inductor values), allowing the same impedance transformation function to be achieved with much shorter physical dimensions, thereby reducing device area while maintaining port matching performance
Solution Approach 2:
The patent introduces dynamically adjustable impedance transformation units that can adapt their transformation ratio based on operating conditions. This dynamic capability allows the system to maintain effective impedance matching across different frequencies and loading conditions without requiring long fixed-length transmission lines, thus reducing the overall device footprint while preserving matching reliability
2Reliability
If conventional Wilkinson power dividers use one-quarter wavelength microstrip lines, then impedance transformation is achieved, but transmission loss increases
Solution Approach 1:
The patent replaces long one-quarter wavelength microstrip lines with compact impedance transformation units that achieve the same impedance transformation function through electromagnetic coupling (transformers) or reactive components. These units have much lower series resistance and fewer losses compared to long transmission lines, thereby reducing transmission loss while maintaining effective impedance transformation
Solution Approach 2:
The patent substitutes the distributed parameter transmission line mechanism (microstrip lines) with lumped parameter impedance transformation units (transformers, capacitors, inductors). This substitution eliminates the inherent ohmic losses and radiation losses associated with long microstrip lines, achieving the same electrical function with significantly reduced energy loss
3Area of stationary object
If conventional power dividers are designed for miniaturization, then device area is reduced, but impedance matching performance deteriorates
Solution Approach 1:
The patent employs impedance transformation units with adjustable transformation ratios that can be optimized for compact geometries. By varying the electrical parameters (transformer turns ratios, component values) rather than relying on fixed geometric dimensions like one-quarter wavelength lines, the system achieves effective impedance matching in a minimized physical footprint
Solution Approach 2:
The patent uses可调 impedance transformation units that can dynamically adapt their electrical characteristics to maintain optimal impedance matching despite the reduced physical dimensions. This dynamic adjustment capability compensates for the effects of miniaturization, allowing the compact device to achieve the same matching performance as larger conventional designs
4Adaptability or versatility
If cascade connection of multiple one-two Wilkinson power dividers is used, then power division functionality is achieved, but the overall device area and complexity increase
Solution Approach 1:
The patent merges the power division function with impedance transformation functions into integrated units. Instead of cascading separate one-two Wilkinson power dividers, the design combines multiple functions into unified building blocks that achieve the same overall effect with fewer discrete components and simpler interconnections, thereby reducing device complexity while maintaining versatile power division functionality
Data Source
AI summary
A power divider, a regulation method, a power allocation method, a storage medium, and an electronic device are disclosed. The power divider includes M power division units. The M power division units are cascade connected to form a cascade structure of N levels, each of the power division units includes one input port and two output ports. Each of power division units in a Kth level in the cascade structure satisfies relationships of: input impedance of a power division unit in the Kth level conjugate-matches output impedance of a unit connected to an input port of the power division unit in the Kth level, and output impedance of the power division unit in the Kth level conjugate-matches load impedance of the power division unit in the Kth level, where N, K, and M are positive integers greater than or equal to 1.