⚡ 本页包含 AI 生成的分析内容，仅供参考
本文提出了一种工作在224GHz的无变容管VCO，采用多段开关负载耦合线谐振器实现了19.9%的调谐范围。该设计旨在解决硅基工艺在太赫兹频段因晶体管截止频率和无源器件Q值限制导致的性能不足问题。
Analog Devices, Beaverton, OR 1 2 THz and sub-THz waves are key enablers for novel sensing and imaging solutions. THz gasphase spectroscopy, hyperspectral imaging, and high-speed communication are among many applications that harness the unique characteristics of THz waves. Wide bandwidth, beamforming, and/or beam steering, as well as adequate power levels are required. However, low-cost silicon-based electronics fall short of delivering the needed performance at these frequencies due to the limited fT/fMAX of transistors as well as the low Q factor of passives. Such limitations are particularly pertinent to tunable circuits such as passive phase shifters [1] and Voltage-Controlled Oscillators (VCOs), where tunable elements, such as varactors and switches, are employed. Varactors have a very low Q factor at frequencies >100GHz [2], as well as a limited capacitance-tuning range, being dominated by parasitics.
Ahmed Elmenshawi1, Sriram Muralidharan2, Mona M. Hella1
Rensselaer Polytechnic Institute, Troy, NY