Compact Wireless Signal Distribution Circuit Design
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Summary
Problems
Wilkinson splitters require multiple ¼ wavelength transmission lines, making it difficult to reduce the circuit area of wireless signal distribution circuits.
Innovation solutions
A distribution circuit with a low noise amplifier and a power splitter that includes input and output matching circuits, utilizing resistive elements and complex conjugate relationships to reduce impedance conversion ratio and circuit area.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a Wilkinson splitter is used to distribute wireless signals, then the distribution function is achieved, but the circuit area increases due to multiple ¼ wavelength transmission lines
Why choose this principle:
The patent changes the impedance parameters from conventional 50Ω to optimized values (30Ω for series resistors, 70Ω for shunt resistors) to reduce the impedance conversion ratio required from the LNAs. This parameter optimization allows the use of shorter transmission lines and smaller matching circuits, directly reducing the overall circuit area while maintaining proper signal distribution functionality
Principle concept:
If a Wilkinson splitter is used to distribute wireless signals, then the distribution function is achieved, but the circuit area increases due to multiple ¼ wavelength transmission lines
Why choose this principle:
The power splitter is divided into independent functional blocks: series resistors, shunt resistors, and output matching circuits. This segmentation allows each component to be optimized separately for minimal area, rather than using a monolithic Wilkinson design that requires fixed ¼ wavelength lines. The modular approach enables compact layout without compromising the distribution function
Application Domain
Data Source
AI summary:
A distribution circuit with a low noise amplifier and a power splitter that includes input and output matching circuits, utilizing resistive elements and complex conjugate relationships to reduce impedance conversion ratio and circuit area.
Abstract
Reduced circuit area in a reception device that distributes wireless signals is disclosed. In one example, a low noise amplifier includes an input matching circuit that converts an input impedance of a downstream circuit, and an amplifier circuit that amplifies a wireless signal received from the input matching circuit. A power splitter includes a first output matching circuit that converts a first load impedance into a first impedance related to a load impedance ZL of the low noise amplifier, and a second output matching circuit that converts a second load impedance into a second impedance related to the ZL.