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We report both electronic and opto-electronic resonant tunneling diode (RTD) oscillators with relatively high output power. Electronic RTD oscillators working at 125/156/308 GHz with around one half milliwatt output power and optoelectronic oscillators in the 30–105 GHz range with about 1 mW output power at 44 GHz have been developed. First wireless transmission experiments with a 300 GHz oscillator...
This paper presents a series of monolithic microwave integrated circuit (MMIC) resonant tunneling diode (RTD) oscillators. The oscillator circuit topology employs two InGaAs/AlAs RTDs in parallel and each device is biased individually. The oscillators operate at 125/156/206/308 GHz with −1.7/−3.3/−14.6/−4.8 dBm output power. With improved epitaxial layer structures and oscillator designs, it is expected...
This paper prepents monolithic microwave integrated circuits (MMIC) employing large size resonant tunneling diode (RTD) with high power at high frequencies. This is achieved by proper design of the resonating inductances which are realized by shorted microstrip transmission lines with low characteristic impedances (Z0 = 10.4 Ω). Two oscillators were fabricated using photolithography. Oscillation frequencies...
This paper presents a G-band (140 −220 GHz) monolithic microwave/ (millimeter-wave) integrated circuit (MMIC) resonant tunneling diode (RTD) oscillator operating at 205.8 GHz with −14.6 dBm output power. The circuit topology employs two InGaAs/AlAs RTDs in parallel. A new RTD epi-layer material design which will greatly benefit micrometer-sized RTD devices for high output power of millimeterwave oscillators...
Devices with negative differential resistance (NDR) regions in their current-voltage (I-V) characteristics such as tunnel diodes (TD) and resonant tunneling diodes (RTDs) have been used for realizing high frequency oscillators. In this paper, a new power combining technique is presented which combines output power through synchronisation of two coupled tunnel diode oscillators. The measured output...
This paper presents a high power (milliwatt) W-band resonant tunneling diode (RTD) oscillator. The oscillator circuit employs two RTD devices in parallel and operates at 75.2 GHz with −0.2 dBm (0.95 mW) output power. To the authors knowledge, this is the highest reported output power for an RTD oscillator at W-band.
A thorough theoretical analysis of a two-stage magnetic pulse compression (MPC) system is presented. The MPC system suffices to form 20kV, 70ns pulses across a 207?? resistive load. Equivalent circuits for two consecutive operation stages of the compressor accounting for nonlinear processes in magnetic switches are analyzed. Both experiment and simulation results illustrated pre-pulse and reverse...
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