Adjustable RF Splitter-Combiner for Inactive Port Impedance Matching
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Solution Overview
Problem
Designing satisfactory radio-frequency splitter-combiner circuitry for electronic devices with wireless communications capabilities is challenging, particularly in minimizing power loss when one or more split ports are inactive.
Innovation Solution
The implementation of an adjustable radio-frequency splitter-combiner circuitry that includes impedance matching circuitry, resistors, and switching circuitry, allowing for different configurations based on the presence of inactive split ports, thereby optimizing impedance matching and reducing power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed configuration radio-frequency splitter-combiner is used, then the circuit design is simple, but power loss increases when one or more split ports are inactive
Solution Approach 1:
The patent implements a dynamically reconfigurable radio-frequency splitter-combiner circuit that can change its configuration based on operational conditions. Switches are integrated into the circuit to enable transition between different configurations, allowing the system to adapt when split ports become inactive, thereby minimizing power loss while maintaining manageable design complexity through systematic reconfiguration
2Loss of energy
If adjustable components are added to reduce power loss, then power loss is reduced, but device complexity increases
Solution Approach 1:
The patent designs a universal reconfigurable circuit structure where switches and adjustable components serve multiple functions: they enable configuration changes to reduce power loss, maintain impedance matching across different operational states, and provide adaptability for various split-port scenarios. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall device complexity
Data Source
AI summary
An electronic device may include wireless circuitry with a processor, a transceiver circuit, a front-end module, and an antenna array having multiple antennas. The front-end module may include radio-frequency splitter-combiner circuitry that splits radio-frequency signals from a single port into multiple radio-frequency signals at multiple split ports and/or combines radio-frequency signals from the multiple ports into radio-frequency signals at the single combined port. The radio-frequency splitter-combiner may include adjustable components such as switches, adjustable inductors, and/or adjustable capacitors that place the radio-frequency splitter-combiner in different configurations based on whether or not there are inactive split ports coupled to inactive antennas. This enables improved impedance matching for active split ports even while one or more split ports remain inactive, thereby reducing power loss in this mode of operation.