Using a superconducting circuit, the Josephson mixer, we demonstrate the first experimental realization of spatially separated two-mode squeezed states of microwave light. Driven by a pump tone, a first Josephson mixer generates, out of quantum vacuum, a pair of entangled fields at different frequencies on separate transmission lines. A second mixer, driven by a π-phase shifted copy of the firs...

The purpose of the radiometer project was to research and demonstrate the working principles of a radiometer system. The radiometer design team was composed of five members, each contributing a specific component to the final system. A radiometer system is a device that detects microwave emissions from noise producing objects [1]. These noise sources are typically objects that emit heat and the...

The 23rd and 31st harmonics of a microwave signal generated in a novel THz balanced Schottky diode mixer were used as a frequency stable reference source to phase lock solid-nitrogen-cooled 2.324 and 2.959 THz QCLs. Hertz level frequency stability was achieved, which was maintained for several hours. Steady improvements in THz QCL performance over the last decade [1] has generated considerable ...

The impedance of the superconducting hot-electron bolometer mixer was measured in the range 0.2-4 GHz. A special technique relying on determination of the Sz, transmission parameter of the device was used. Many advantages of the technique (wide frequency range, in situ calibration, low test power, accuracy) are demonstrated. The estimate of the mixer bandwidth from the impedance data using the ...

Development of Millimeter Wave Integrated-Circuit Interferometric Sensors for Industrial Sensing Applications. (December 2004) Seoktae Kim, B.S., Inha University, S. Korea; M.S., Pohang University of Science and Technology, S. Korea Chair of Advisory Committee: Dr. Cam Nguyen New millimeter wave interferometric, multifunctional sensors have been studied for industrial sensing applications: disp...

Frequency stabilization of a THz quantum cascade laser (QCL) to the harmonic of a microwave source has been accomplished using a Schottky diode waveguide mixer designed for harmonic mixing. The 2.32 THz, 1.0 milliwatt CW QCL is coupled into the signal port of the mixer and a 110 GHz signal, derived from a harmonic of a microwave synthesizer, is coupled into the IF port. The difference frequency...

Graphene is a one-atom-thick sheet of carbon with numerous impressive properties. It is a promising material for future high-speed nanoelectronics due to its intrinsic superior carrier mobility and very high saturation velocity. These exceptional carrier transport properties suggest that graphene field effect transistors (G-FETs) can potentially outperform other FET technologies. This doctoral ...

This article presents a direct down-conversion mixer for ultra-wideband systems on 0.18 m RF CMOS process. The proposed mixer uses a current bleeding technique and an internal resonant inductor to improve the conversion gain and noise figure of the conventional Gilbert-cell mixer. Effects of each technique are compared on mixer’s noise performance. Measured results show the conversion gain of 7...

We report on microwave measurements of superconducting aluminum hot-electron bolometers (Al HEBs). Diffusion-cooled Al HEB mixers are good candidates for spaceborne applications in the Terahertz frequency range since they are predicted to have small local oscillator (LO) power requirements, intermediate frequency (IF) bandwidths 10 GHz, and a noise temperature lower than that of Nb and NbN HEBs...

The 23rd and 31st harmonics of a microwave signal generated in a novel THz balanced Schottky diode mixer were used as a frequency stable reference source to phase lock solid-nitrogen-cooled 2.324 and 2.959 THz quantum cascade lasers. Hertz-level frequency stability was achieved, which was maintained for several hours.