Dual RF Transmit Path Switching for Lower Terminal Power Use
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Solution Overview
Problem
RF-based communication terminals waste power due to excessive amplification when close to a base station, as they require only lower power amplification for successful signal transmission.
Innovation Solution
The RF-based communication terminal employs a dual-switching chip configuration with a low noise amplifier and a power amplifier, along with comparison and control modules to dynamically switch between amplification modes based on signal strength, using a low noise amplifier for closer proximity and a power amplifier for farther distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power amplifier is used to amplify radio signals, then successful transmission to base station is ensured, but power is wasted when the terminal is close to the base station
Solution Approach 1:
The system dynamically switches between power amplifier and low noise amplifier based on real-time signal strength measurements. The control module monitors the received signal quality and adjusts the amplification path accordingly, making the amplification capability adaptive to the terminal's distance from the base station rather than using a fixed high-power amplification path.
Solution Approach 2:
The invention changes the amplification parameter by switching between two different amplifiers with different gain characteristics. When the terminal is far from the base station, high gain power amplifier is used; when close, low gain low noise amplifier is used. This parameter switching resolves the contradiction between ensuring transmission reliability and minimizing power consumption.
2Length of moving object
If a power amplifier is used for signal transmission, then signal strength is sufficient for long distance, but unnecessary power is consumed for short distance transmission
Solution Approach 1:
The system implements dynamic amplification path selection based on measured signal strength. The control module adjusts which amplifier is active according to the terminal's distance from the base station, enabling the system to adapt its power consumption to the actual transmission distance requirement rather than operating at maximum power continuously.
Solution Approach 2:
Different amplification characteristics are applied locally based on the terminal's position relative to the base station. The system uses high-power amplification only when needed (long distance) and low-power amplification when sufficient (short distance), making the amplification quality match the local transmission requirements.
3Reliability
If high power amplification is always used, then transmission reliability is maintained, but power efficiency decreases
Solution Approach 1:
The system dynamically adjusts amplification power based on real-time channel conditions. By continuously monitoring signal strength and switching between amplifiers, the system maintains transmission reliability only when necessary rather than operating at full power continuously, thus reducing energy waste while preserving reliability.
Solution Approach 2:
Instead of always using excessive power amplification, the system applies partial amplification (low noise amplifier) when sufficient and excessive amplification (power amplifier) only when necessary. This partial action approach eliminates energy waste from excessive amplification while maintaining reliability when needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution optimizes power usage by selectively engaging high or low power amplifiers based on distance from the base station, reducing unnecessary power consumption and enhancing transmission efficiency.
Implementation Method 1
a low noise amplifier (LNA) 13
Implementation Method 2
radio signals are typically amplified by a power amplifier (PA) before being sent to an antenna
Implementation Method 3
The RF-based communication terminal employs a dual-switching chip configuration with a low noise amplifier and a power amplifier
Data Source
AI summary
A radio frequency (RF)-based communication terminal includes a first switching chip, a second switching chip, a comparison module, a low noise amplifier (LNA), a first filter, a power amplifier (PA), a second filter, and a control module. The comparison module compares the power of a radio signal Rx received from a base station with a pre-stored signal and to output a control signal according to the comparison result. The control module controls conductive modes of the first and the second switching chips according to the control signal. In the first conductive mode, a radio signal Tx is sent out from the PA and the second filter. In the second conductive mode, the radio signal Tx is exchanged to send out from the LNA and first filter.