Study of ultrahigh-frequency signal generation and processing using resonant tunneling chaos devices

本研究的目的是利用共振隧穿二极管制作超高频混沌发生器电路，并建立新的信号产生/处理技术，主要研究了由共振隧穿二极管、电容和电感组成的简单电路--受迫货车der Pol振荡器。该电路根据振荡输入的频率、幅度和偏置电压输出各种信号模式。首先，我们通过数值模拟确认了该电路的基本工作原理，发现该电路可以作为超高速分频器使用。接下来，我们采用RTD/HEMT集成技术在InP衬底上制作了单片微波集成电路（MMIC）。在此基础上，利用CMOS RTD仿真电路，研究了移位映射混沌发生器电路，并对移位映射混沌发生器进行了仿真研究。我们使用VDEC（VLSI设计与教育中心）0.6um CMOS芯片制造程序演示了它的基本操作。

The purpose of this study is to fabricate ultrahigh-frequency chaos generator circuits using resonant tunneling diodes and to establish new signal generation/processing technologies using them.We mainly studied the forced Van der Pol oscillator, which is a simple circuit consisting of a resonant tunnelmg diode, a capacitor, and an inductor. This circuit outputs various signal patterns depending on the frequency, amplitude, and a bias voltage of the oscillating input. First, we confirmed the basic operation of the circuit by numerical simulation, and here we found that this circuit can be used as an ultra-high speed frequency divider. Next, we fabricated the monolithic microwave integrated circuits (MMICs) on InP substrates using RTD/HEMT integration technology. Then, we demonstrated high frequency operation of the circuits at frequencies as high as 50 GHz, The maximum is hmited by the HEMT used in the output buffer, so the extremely high frequency operation close to theoperation frequency cutoff frequency of the RTD is expected with appropriate circuit design.In addition to this another type of chaos generator circuit, the shift map chaos generator, was studied using CMOS RTD emulation circuit. We demonstrated its basic operations using VDEC (VLSI Design and Education Center) 0.6um CMOS chip fabrication program.