为无线射频能量采集系统设计2.45GHz高效率校正电路
Yanhu Huang1, Jiajun Liang1,2, Zhao Wu1
1Guangxi University Key Lab of Complex System Optimization and Big Data Processing, Guangxi Applied Mathematics Center, Yulin Normal University, Yulin 537000, China.
Micromachines
|March 28, 2024
概括
本研究介绍了用于无线射频 (RF) 能量收集系统的高效调整电路. 拟议的电路实现了74.8%的转换效率,证明了其实际应用潜力.
科学领域:
- 电气工程 电气工程
- 电磁学 电磁学 电磁学 电磁学
- 收集能源 收集能源
背景情况:
- 无线电力传输系统依赖于高效的能源收集.
- 射频 (RF) 能量采集是为低功耗设备提供动力的关键技术.
- 现有的整形电路经常受到低转换效率的影响.
研究的目的:
- 为2.45GHz无线射频能量采集系统提出一个高效率的调整电路.
- 设计和分析双极化交叉双极接收天线.
- 通过输出匹配网络优化纠正电路.
主要方法:
- 设计了一种双极化交叉双极天线,带宽为2.3-2.5 GHz,增益为7.97 dBi.
- 开发了一种整正电路,其中包含一个输出匹配网络,以抑制波元件.
- 测试了电路在2.45 GHz的性能,输入功率为13dBm,负载为2kΩ.
主要成果:
- 实现了74.8%的最大RF-to-DC转换效率.
- 获得的最大直流输出电压为4.92V.
- 实验结果与模拟预测非常接近.
结论:
- 拟议的整形电路为射频能量收集提供了高效率.
- 双极化天线设计适用于指定的频段.
- 该系统显示了实际无线电力传输应用的巨大潜力.
相关概念视频
Bridge rectifier
600
The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
600
Full wave rectifier
1.1K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
1.1K
Mesh Analysis for AC Circuits
374
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
374
Half wave rectifier
1.1K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
1.1K
Characteristics of Series Resonant Circuit
257
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
257
Design Example: Underdamped Parallel RLC Circuit
288
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Starting with a fixed...
288


