MLCC Resonant Isolation Circuit for Constant 5G Output Voltage
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Solution Overview
Problem
The challenge of reducing heat generation and size of printed circuit boards (PCBs) in wireless communication systems, particularly in 5G communication systems, is addressed by minimizing the volume of power circuits and PCBs through isolation using multilayer ceramic capacitors (MLCCs) and resonance with inductors in circuits for constant-magnitude output voltage.
Innovation Solution
The solution involves converting an input DC signal into an AC signal using a full-bridge inverter, isolating this AC signal with a plurality of MLCCs, and then converting it back to a DC signal using a full-bridge rectifier, with an inductor connected to each MLCC to achieve resonance at a specific frequency, thereby reducing heat generation and PCB size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional power circuits are used in wireless communication systems, then reliable power conversion is achieved, but heat generation increases and PCB size increases
Solution Approach 1:
The power circuit is segmented into multiple parallel full-bridge rectifier circuits, each processing a portion of the input power. This distribution reduces the current burden on each individual rectifier, thereby reducing heat generation while maintaining overall power conversion reliability through redundant parallel paths
Solution Approach 2:
Multiple full-bridge rectifier circuits are nested in parallel configurations, with each rectifier unit containing its own integrated components. This nested structure allows for compact arrangement that reduces overall circuit volume and heat generation while maintaining reliable power conversion
2Power
If traditional power circuits are used in wireless communication systems, then adequate power supply is provided, but volume of power circuit increases and PCB size increases
Solution Approach 1:
Multiple full-bridge rectifier circuits are merged into a single integrated power conversion system with shared control and output filtering components. This merging reduces the total volume of the power circuit while maintaining adequate power supply capability through the combined output of parallel rectifier units
Solution Approach 2:
The parallel full-bridge rectifier circuit configuration serves multiple functions simultaneously: power conversion, heat distribution, and compact integration. This multi-functionality reduces the overall power circuit volume by eliminating redundant separate components while maintaining adequate power supply
3Object-affected harmful factors
If isolation components are added to the circuit, then electromagnetic isolation is improved, but device complexity increases
Solution Approach 1:
Multilayer ceramic capacitors are introduced as intermediary components between the full-bridge inverter and full-bridge rectifier circuits. These capacitors provide electromagnetic isolation and filtering without significantly increasing circuit complexity, as they can be integrated into the existing parallel rectifier structure
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 approach effectively reduces the volume of power circuits and PCBs by distributing current across parallel MLCCs, minimizing heat generation and optimizing design without increasing component size, thus enhancing communication performance.
Implementation Method 1
an inductor may be connected to one end of each of the plurality of MLCCs, and an operating frequency of the first AC signal may correspond to a resonant frequency
Data Source
AI summary
The disclosure relates to a fifth-generation (5G) or pre-5G communication system to support a higher data transmission rate beyond that of a fourth-generation (4G) communication system, such as Long-Term Evolution (LTE). According to embodiments of the disclosure. An apparatus and method in a wireless communication system are provided. The apparatus includes a full-bridge inverter configured to convert an input first direct current (DC) signal into a first alternating current (AC) signal, a plurality of multilayer ceramic capacitors (MLCCs) configured to isolate the first AC signal output from the full-bridge inverter to output a second AC signal, and a full-bridge rectifier configured to convert the second AC signal output from the plurality of MLCCs into a second DC signal. The plurality of MLCCs isolate the full-bridge inverter from the full-bridge rectifier, an inductor is connected to one end of each of the plurality of MLCCs, and an operating frequency of the first AC signal corresponds to a resonant frequency.