射频能量采集系统的谐波抑制技术

Harmonic Suppression Technology of ＲF Energy Acquisition System

摘要:

针对射频能量采集系统中谐波抑制电路存在的效果不佳和效率不高的问题，提出一种基于对称二极管整流 电路的扇形带线的谐波抑制电路设计。该设计使用对称二极管整流电路的设计对由非线性电子元件而引发的偶次 谐波进行抑制; 同时引入 3 个经过优化设计的扇形带线对 3 次谐波进行有效抑制，通过利用扇形带线所具有的宽带阻 特性实现了整流电路对输入信号频率的较好的适应性。试验证明，在测试条件下该电路能够在较宽的输入频段内有 效抑制 4 阶输入谐波，且整流效率最大值达到 78． 2% 。

Abstract:

Aiming at the problems such as poor effect and low efficiency existing in harmonic suppression circuit in ＲF energy acquisition system，a design of harmonic suppression circuit with a fan belt line based on symmetric diode rectifier circuit is proposed． The proposed design uses the design of symmetric diode rectifier circuit to suppress even harmonics caused by nonlinear electronic components，at the same time three fan belt lines with optimized design are introduced to suppress the third harmonic effectively，and through the use of fan belt line with broadband impedance characteristics the rectifier circuit realizes a good adaptability to the input signal frequency． The experiment proves that the circuit can effectively suppress the fourth order input harmonics in the wider input band，and the maximum rectifying efficiency reaches 78． 2% ．