Circuit Board Temperature Drift Compensation for 5G Signal Integrity
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Solution Overview
Problem
The dielectric constant (Dk) and loss factor (Df) of resin in circuit boards and IC carriers exhibit temperature drift, leading to signal integrity issues and performance deterioration at extreme temperatures, especially with higher frequencies used in 5G communication systems, affecting user experience and prolonging product development cycles.
Innovation Solution
A circuit board structure with heat-sensitive elements and a temperature drift processing chip that monitors peripheral temperatures of heat-generating devices, adjusting signal waveforms in real-time to maintain signal integrity across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If higher frequencies are used for signal transmission in 5G communication systems, then communication speed and data rate are improved, but signal integrity deteriorates due to temperature drift in Dk and Df of resin
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing calibration parameters for different temperature conditions in a lookup table before actual operation. During runtime, the system only needs to query the pre-prepared calibration parameters based on measured temperature, avoiding complex real-time calculations and enabling fast compensation for temperature drift effects on signal integrity
Solution Approach 2:
The patent implements feedback by continuously monitoring the temperature around the heat-generating device using temperature sensors, comparing it with reference temperature, and dynamically adjusting signal waveform parameters based on the temperature difference. This closed-loop feedback mechanism ensures signal integrity is maintained despite temperature variations in high-frequency 5G communication
2Reliability
If simulation margins are increased during signal debugging to meet basic digital signal transmission requirements, then functionality is ensured, but performance is reduced
Solution Approach 1:
The patent applies dynamics by making the signal waveform parameters adjustable and adaptive rather than fixed. The system dynamically modifies waveform characteristics such as amplitude, width, and rise/fall times based on real-time temperature conditions, allowing optimal performance across varying thermal environments without requiring excessive simulation margins
Solution Approach 2:
The patent implements parameter changes by systematically varying signal waveform parameters (amplitude, width, rise time, fall time) based on temperature conditions. The calibration process establishes optimal parameter combinations for different temperature ranges, enabling the system to maintain high performance across the full operating temperature range without sacrificing reliability
3Device complexity
If temperature drift compensation is not implemented, then device complexity is reduced, but signal integrity deteriorates at extreme temperatures
Solution Approach 1:
The patent applies segmentation by dividing the temperature compensation function into separate modular components: temperature sensing modules positioned around the heat-generating device, a dedicated processing chip for temperature drift compensation, and lookup tables for calibration parameters. This modular segmentation allows the compensation mechanism to be added without redesigning the entire circuit board, maintaining relatively simple device complexity while improving reliability
Solution Approach 2:
The patent introduces an intermediary processing chip that acts as a mediator between the temperature sensors and the signal processing circuitry. This intermediary component receives temperature data, queries calibration parameters, and generates compensation signals without requiring direct modification of the main signal path or circuit board structure, thus maintaining simplicity while enabling temperature drift compensation
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
Ensures optimal signal integrity and performance experience across different temperatures, expanding the applicable temperature range and improving product competitiveness in high-frequency bands.
Implementation Method 1
the temperature drift processing chip is electrically connected to the at least two heat-sensitive elements
Implementation Method 2
obtaining calibration parameter information based on the first temperature information; and sending the calibration parameter information to a signal processing chip
Data Source
AI summary
A circuit board structure, an information processing method and apparatus, and a communication device. The circuit board structure includes a circuit board substrate, a temperature drift processing chip, and at least two heat-sensitive elements; the circuit board substrate including a first substrate and a second substrate opposite the first substrate. The first substrate is provided with a heat-generating device; and the second substrate has a cavity, the cavity being provided with at least one boss extending toward the first substrate. The heat-generating device is located between the first substrate and the boss; the at least two heat-sensitive elements are disposed at a peripheral position of the heat-generating device; and the temperature drift processing chip is electrically connected to the at least two heat-sensitive elements, and the temperature drift processing chip is disposed on the circuit board substrate.