Theory and Time-Domain Simulation of Third-Order Intermodulation Suppression by Signal Injection

IF 2.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Microwave and Wireless Components Letters Pub Date : 2022-12-01 DOI:10.1109/LMWC.2022.3186938

Zongbiao Zhang, Zongbiao Zhang, Ming Zhi Li

引用次数: 0

Abstract

This letter reports a new theoretical analysis of third-order intermodulation (IM3) reduction in nonlinear communication amplifiers by signal injection. On the basis of well-known Volterra series analysis, we put forward a general model that can analyze both the qualitative and quantitative effects of injected signal parameters on output IM3s, which previous literatures failed to achieve. Our theory can directly calculate the optimal amplitude and phase of single injected signal and points out the duality for some dual-signal injections which can help reduce their parameter scanning complexity from 4-D to 2-D. These conclusions are in good agreement with the simulation of two traveling wave tube (TWT) amplifiers by 3-D-FDTD-PIC code and CST and MTSS. Our work proposes an original analysis about how to adjust injected external signals to obtain best IM3 cancellation in communication systems, and boosts the research efficiency for new signal injection techniques from a novel perspective.

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信号注入抑制三阶互调的理论与时域仿真

本文报道了通过信号注入降低非线性通信放大器中三阶互调（IM3）的新理论分析。在著名的Volterra级数分析的基础上，我们提出了一个通用的模型，该模型可以定性和定量地分析注入信号参数对输出IM3的影响，而以前的文献未能实现这一点。我们的理论可以直接计算单注入信号的最佳幅度和相位，并指出一些双信号注入的对偶性，这有助于将其参数扫描复杂度从4-D降低到2-D。这些结论与用3-D-FDTD-PIC代码以及CST和MTSS对两个行波管放大器的仿真结果吻合较好。我们的工作提出了一个关于如何调整注入的外部信号以在通信系统中获得最佳IM3消除的原始分析，并从一个新的角度提高了新信号注入技术的研究效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Microwave and Wireless Components Letters 工程技术-工程：电子与电气

自引率

13.30%

发文量

376

审稿时长

3.0 months

期刊介绍： The IEEE Microwave and Wireless Components Letters (MWCL) publishes four-page papers (3 pages of text + up to 1 page of references) that focus on microwave theory, techniques and applications as they relate to components, devices, circuits, biological effects, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, medical and industrial activities. Microwave theory and techniques relates to electromagnetic waves in the frequency range of a few MHz and a THz; other spectral regions and wave types are included within the scope of the MWCL whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.