Transceiver Chain Switching for Power Amplifier Thermal Management
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Solution Overview
Problem
High signal path loss between a base station and a wireless communication device leads to increased power amplifier temperature, reducing efficiency and causing signal distortion, and conventional solutions like reducing maximum transmit power limit can affect link quality and increase call drop rates.
Innovation Solution
A Dual-SIM, Dual-Active wireless communication device with temperature sensors and a control unit that switches transceiver chains when the operating temperature of one transceiver chain exceeds a threshold, rerouting digital signals to minimize power loss and maintain call quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the maximum transmit power limit is reduced to mitigate temperature rise, then the power amplifier temperature is controlled, but the link quality deteriorates and call drop rates increase
Solution Approach 1:
The patent divides the communications unit into multiple independent transceiver chains (first transceiver chain and second transceiver chain), each with its own power amplifier. This segmentation allows the system to switch between different power amplifiers based on temperature conditions, enabling temperature control without compromising link quality by maintaining high power transmission capability through the cooler amplifier chain.
2Speed
If high power transmission is used to overcome signal path loss, then the communication range is extended, but the power amplifier temperature rises and efficiency decreases
Solution Approach 1:
The patent implements dynamic switching between the first and second transceiver chains based on real-time temperature monitoring. The control unit dynamically redirects communication signals to the cooler power amplifier chain when temperature thresholds are exceeded, allowing the system to maintain high power transmission capability for extended communication range while improving overall energy efficiency by utilizing the more efficient cooler amplifier.
3Speed
If high power transmission is used to overcome signal path loss, then the communication range is extended, but the power amplifier linearity is degraded causing signal distortion
Solution Approach 1:
The control unit acts as an intermediary that monitors power amplifier temperature and automatically switches between transceiver chains to maintain optimal operating conditions. This intermediary control mechanism ensures that the power amplifier operates within its linear range by selecting the cooler chain with better linearity characteristics, thereby preventing signal distortion while maintaining extended communication range capability.
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
Effectively mitigates power amplifier temperature rise by switching to a cooler transceiver chain, improving call quality and preventing drops while maintaining efficient power transmission.
Implementation Method 1
one or more temperature sensors configured to sense operating temperatures of the first communications unit and the second communications unit and provide temperature signals to the control unit
Data Source
AI summary
A wireless communication device includes: a first communications unit configured to communicate with a first communication network; a second communications unit configured to communicate with a second communication network; a control unit configured to control operation of the wireless communication device; and one or more temperature sensors configured to sense operating temperatures of the first communications unit and the second communications unit and provide temperature signals to the control unit. In response to a determination that an operating temperature of the first communications unit conducting a first call exceeds a predetermined threshold temperature and an operating temperature of the second communications unit does not exceed the predetermined threshold temperature, the control unit is configured to cause the first call on the first communications unit to be switched from a first transceiver chain in the first communications unit to a second transceiver chain in the second communications unit.