摘要
集成单电子晶体管SET(Single Electron Transistor)与射频共振电路的射频单电子晶体管RF SET(Radio FrequencySingle Electron Transistor)是一种高速高灵敏的电荷计。通过建立RF SET的等效电路模型,对共振电路及其与射频传输线的集成进行模拟分析,得到了SET阻抗的最佳匹配,获得了所需的谐振频率、品质因子和对SET阻抗的灵敏度。结果表明,受电荷调制的SET阻抗直接影响着共振电路的品质因子、阻抗和射频透射/反射系数。射频信号随着SET的阻抗降低而减小,峰位基本不变。在SET阻抗小于200 kΩ时,共振信号幅度随阻抗的变化率较大。透射式与反射式两种结构相比,前者共振频率及品质因子更高,后者则具有更高的灵敏度优势。
By integrating a single electron transistor（SET）with a radio resonance circuit,the radio frequency singleelectron transistor（RF SET）can be used as an extremely sensitive and ultra high-speed electrometer. In this work,the equivalent circuit model of RF SET is established. The resonance circuit and the integration with the RF transmis-sion line are investigated. The optimum matching of the SET impedance,resonant frequency,quality factor and thesensitivity of the SET impedance are obtained. Results indicate that the charge-induced impedance of the SET has di-rect impacts on the quality factor,impedance and the transmission or reflection coefficient of the RF circuit. The ra-dio signal decreases with increasing impedance of the SET,while the peak position remains unchanged. The ampli-tudes of the resonance vary significantly with impedance under 200 kΩ. Comparisons indicate that the transmissionRF SET has higher resonance frequency and quality factor,while the reflection RF SET shows a higher sensitivity.
出处
《传感技术学报》
CAS
CSCD
北大核心
2016年第4期484-488,共5页
Chinese Journal of Sensors and Actuators
基金
中国科学院科研装备研制项目(YZ201152)
国家自然科学基金项目(11403084)
中央高校基本科研业务费专项资金项目(JUSRP51510,JUDCF12032)
江苏省普通高校研究生创新计划基金项目(CXLX12_0724)
关键词
电荷计
射频单电子晶体管
等效电路
透射
反射
electrometer
radio frequency single electron transistor
equivalent circuit
transmission
reflection
