Power Amplifier Module With Matrix Switching for 4G/5G Band Integration
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Solution Overview
Problem
The size of power amplifier modules increases due to the need for additional modules to support combinations of 4G and 5G frequency bands in evolved universal terrestrial radio access network-new radio dual connectivity (EN-DC) systems, particularly when implementing carrier aggregation across mid-band and high-band frequency groups.
Innovation Solution
A power amplifier module configuration that includes multiple low noise amplifiers and filter circuits, along with a full matrix output switch, allows for the simultaneous handling of multiple frequency bands by attenuating harmonic waves and enabling electrical connections between input and output terminals, reducing the overall module size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate modules are used to support 4G and 5G frequency bands, then the communication capability across different frequency bands is improved, but the overall system size increases
Solution Approach 1:
The patent combines multiple low noise amplifiers (LNA1, LNA2) and filter circuits into a single integrated power amplifier module that can simultaneously handle both 4G and 5G frequency bands. The output switch integrates multiple input terminals receiving signals from different frequency bands and routes them to appropriate output terminals, eliminating the need for separate modules for each frequency band combination.
Solution Approach 2:
The power amplifier module is designed with universal functionality to support multiple frequency bands (including 4G and 5G) through a single device. The filter circuit can attenuate signals of frequency bands higher than the second signal, and the output switch can dynamically connect different input terminals to output terminals based on the required frequency band combination, making the module adaptable to various communication scenarios without requiring additional specialized modules.
2Object-affected harmful factors
If a filter circuit is added to attenuate high frequency signals, then signal interference is reduced, but the device complexity increases
Solution Approach 1:
The filter circuit is integrated within the power amplifier module alongside the low noise amplifiers and output switch, rather than being a separate external component. This consolidation reduces the number of discrete components and interconnections, thereby reducing overall device complexity while maintaining the signal interference attenuation function.
Solution Approach 2:
The filter circuit acts as an intermediary component positioned between the low noise amplifiers and the output switch, selectively attenuating high frequency signals that would cause interference. This mediator approach allows for precise control of signal paths and interference management without requiring complex external filtering systems.
Data Source
AI summary
An output switch includes; a plurality of input terminals and output terminals each of the plurality of input terminals is electrically connected to at least one of the plurality of output terminals; a first low noise amplifier that amplifies a signal of a predetermined frequency band input through an antenna and outputs a first signal to a first input terminal among the plurality of input terminals, and a second low noise amplifier that amplifies a signal of a predetermined frequency band input through an antenna and outputs a second signal to a second input terminal different from the first input terminal among the plurality of input terminals. A filter that attenuates a signal of a frequency band higher than a frequency band of the second signal is electrically connected between the second input terminal and the second low noise amplifier.