A 9.05-to-37.0GHz LO Generator with Magnetic Mode Switching and Tuning-Free Octave-Bandwidth Common-Mode Resonator Achieving >190.7dBc/Hz FoM

📋 论文概要

本文提出了一种9.05至37.0GHz的LO发生器，采用磁模式切换和无调谐倍频程带宽共模谐振器技术，解决了高频VCO调谐范围超过一个倍频程时面临的瓶颈问题，实现了宽频带覆盖和低相位噪声。

💡 主要创新点

• 提出磁模式切换技术，通过改变谐振器磁耦合方式实现多模式工作，扩展调谐范围。
• 设计无调谐倍频程带宽共模谐振器，无需额外调谐即可覆盖整个倍频程带宽，简化电路复杂度。

🏷 关键词

📄 原文摘要

VCOs with a wide tuning range (TR) are crucial for achieving universal frequency coverage in multi-band communications, software-defined radios, and electronic warfare applications. A TR exceeding one octave is particularly desirable, as it enables seamless frequency synthesis through cascade ÷2 dividers or ×2 multipliers [1]. To enhance both TR and phase noise (PN), VCO architectures have evolved from single-core single-mode to multi-core multi-mode configurations [2-15]. Despite these advancements, octave-TR VCOs operating at >10GHz still face two major bottlenecks (Fig. 34.4.1, top). (1) Achieving high FoM with minimal FoM variation across the TR: The worst-case FoM of existing octave-TR VCOs has been limited to below 185.1dBc/Hz [2-10], primarily due to a lower tank quality factor (Q) compared to narrowband VCOs. This Q degradation is often caused by destructive magnetic coupling for achieving low inductances in higher-frequency

👥 作者与机构

Hao Guo, Yaolong Hu, Taiyun Chi

Rice University, Houston, TX