A 22.8-to-43.2GHz Tuning-Less Injection-Locked Frequency Tripler Using Injection-Current Boosting with 76.4% Locking Range for Multiband 5G Applications

📋 论文概要

本文提出了一种无需调谐的注入锁定频率三倍器（ILFT），通过注入电流增强技术将锁定范围提升至76.4%，工作频率覆盖22.8至43.2GHz，解决了传统ILFT锁定范围窄的问题，适用于多频段5G毫米波本地振荡器生成。

💡 主要创新点

• 提出注入电流增强技术，显著拓宽了注入锁定频率三倍器的锁定范围至76.4%。
• 实现22.8-43.2GHz的宽频带覆盖，无需额外的调谐元件，简化了电路设计。

🏷 关键词

📄 原文摘要

Future cross-network and international roaming are attractive in mm-wave fifthgeneration (5G) wireless networks with multiband operations. The generation of an ultra-wide-bandwidth ultra-low-phase-noise (PN) local oscillator (LO) signal in massive multiple-input multiple-output (MIMO) transceivers, which support spectra around 28GHz, 37GHz, and 39GHz, becomes a significant challenge. Injection-locked frequency tripler (ILFT) is a good candidate for LO generation due to its low PN property while suffering from a narrow locking range. Varactors are often used to tune the free-running frequency to increase the bandwidth [1]. However, the PN performance degrades when the target frequency is far away from the free-running frequency, which means a complex calibration mechanism must be applied [2,3]. Meanwhile, an ILFT with such a self-calibration circuit still suffers from a narrow locking range, which cannot support multiband operations.

👥 作者与机构

Jingzhi Zhang, Huihua Liu, Chenxi Zhao, Kai Kang

University of Electronic Science and Technology of China, Chengdu, China