LTE Frequency Band Switching via Single-Path Power Amplification
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Solution Overview
Problem
Existing LTE designs with four high-frequency paths are insufficient for supporting multiple high-frequency bands, leading to increased manufacturing and design costs.
Innovation Solution
A combination of a low-cost single-path power amplification module and a switching module is used to implement multi-path frequency band communication and switching, including a power amplification module, a switching module, a duplexer, an antenna switch, and an antenna, which divides and selects frequency bands according to switching instructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a power amplifier with four high-frequency paths is used to support multiple high-frequency bands, then the frequency band coverage is improved, but the manufacturing cost and design cost increase
Solution Approach 1:
The patent segments the frequency band handling function by separating the power amplification path from the frequency selection function. Instead of having multiple parallel power amplifier paths, a single power amplification path is used with a switching module that segments and routes signals to different frequency bands, reducing manufacturing complexity while maintaining multi-band support
Solution Approach 2:
The switching module serves multiple functions: it divides the single power amplification output into multiple frequency band signals, selects the current working frequency band, and routes signals to the appropriate path. This multi-functional component replaces what would otherwise require multiple dedicated power amplifier paths, reducing cost while maintaining versatility
2Adaptability or versatility
If a power amplifier with four high-frequency paths is used to support multiple high-frequency bands, then the frequency band coverage is improved, but the design complexity increases
Solution Approach 1:
The patent extracts the frequency selection and routing function from the power amplifier structure itself and places it in a separate switching module. This extraction simplifies the power amplifier design to a single path while the switching module handles the complexity of multi-band routing, reducing overall design complexity
Solution Approach 2:
The switching module acts as an intermediary between the single power amplification output and the multiple frequency band requirements. It mediates the signal distribution and selection process, providing a manageable interface that reduces design complexity compared to directly integrating multiple paths in the power amplifier
Data Source
AI summary
An LTE frequency band switching device and method, and a mobile terminal are provided. The device includes a power amplification module, a switching module, a duplexer, an antenna switch and an antenna. An output signal is outputted to the switching module after being amplified by the power amplification module; the switching module divides same into a plurality of frequency band signals, and selects a current working frequency band according to a switching instruction; the duplexer controls the transceiving of a working frequency band signal; and when the antenna switch is turned on, the current working frequency band signal is transceived by the antenna.