Now showing items 1-14 of 14

    • An Integrated Germanium-Based THz Impulse Radiator with an Optical Waveguide Coupled Photoconductive Switch in Silicon 

      Chen, Peiyu; Hosseini, Mostafa; Babakhani, Aydin (2019)
      This paper presents an integrated germanium (Ge)-based THz impulse radiator with an optical waveguide coupled photoconductive switch in a low-cost silicon-on-insulator (SOI) process. This process provides a Ge thin film, ...
    • Electron spin resonance for medical imaging 

      Yang, Xuebei; Chen, Charles; Seifi, Payam; Babakhani, Aydin (2018-01-02)
      A method includes generating, from an integrated oscillator circuit, an oscillating output signal and generating, by an integrated power amplifier (PA) circuit, an amplified oscillating output signal based on the oscillating ...
    • EPR systems for flow assurance and logging 

      Babakhani, Aydin; Yang, Xuebei (2019-09-10)
      An Electron Paramagnetic resonance (EPR) system and method allows the measurement paramagnetic characteristics of materials in real-time, such as heavy oil, hydrocarbons, asphaltenes, heptane, vanadium, resins, drilling ...
    • Fully programmable digital-to-impulse radiating array 

      Assefzadeh, Mohammad Mahdi; Babakhani, Aydin (2019-02-19)
      A fully-programmable digital-to-impulse radiator with a programmable delay is discussed herein. The impulse radiator may be part of an array of impulse radiators. Each individual element of the array may be equipped with ...
    • High efficiency carbon nanotube thread antennas 

      Bengio, E. Amram; Senic, Damir; Taylor, Lauren W.; Tsentalovich, Dmitri E.; Chen, Peiyu; Holloway, Christopher L.; Babakhani, Aydin; Long, Christian J.; Novotny, David R.; Booth, James C.; Orloff, Nathan D.; Pasquali, Matteo (2017)
      Although previous research has explored the underlying theory of high-frequency behavior of carbon nanotubes (CNTs) and CNT bundles for antennas, there is a gap in the literature for direct experimental measurements of ...
    • Impulse sampler architecture and active clock cancellation architecture 

      Aggrawal, Himanshu; Babakhani, Aydin (2019-02-12)
      A novel nonlinear impulse sampler is presented that provides a clock sharpening circuit, sampling stage, and post-sampling block. The clock sharpening circuit sharpens the incoming clock while acting as a buffer, and the ...
    • Intergrated electron spin resonance spectrometer 

      Yang, Xuebei; Chen, Charles; Seifi, Payam; Babakhani, Aydin (2017-06-27)
      An integrated electron spin resonance (ESR) circuit chip includes a chip substrate, a transmitter circuit, and a receiver circuit. The transmitter circuit and receiver circuit are disposed on the chip substrate. The ...
    • Methods and related systems of ultra-short pulse detection 

      Babakhani, Aydin; Jamali, Babak (2019-01-29)
      Ultra-short pulse detection. At least some example embodiments are methods including: receiving by an antenna a series of ultra-short pulses of electromagnetic energy at a repetition frequency, the receiving creates a pulse ...
    • Miniaturized direct digital-to-impulse radar sensors in silicon 

      Assefzadeh, Mahdi M.; Babakhani, Aydin (2019-03-05)
      A radar system may comprise a trigger, driver, switching circuit, and antenna for generating an ultra-short impulse without utilizing an oscillator. A radar imaging system for imaging a formation or a cross section of a ...
    • Modulation-Doped Multiple Quantum Wells of Aligned Single-Wall Carbon Nanotubes 

      Komatsu, Natsumi; Gao, Weilu; Chen, Peiyu; Guo, Cheng; Babakhani, Aydin; Kono, Junichiro (2017)
      Heterojunctions, quantum wells, and superlattices with precise doping profiles are behind today's electronic and photonic devices based on III–V compound semiconductors such as GaAs. Currently, there is considerable interest ...
    • Systems and methods for active cancellation for improving isolation of transmission gates in high-frequency analog to digital converters 

      Aggrawal, Himanshu; Babakhani, Aydin (2016-01-26)
      An active cancellation system may provide a first and second transmission gates that are fed with an input signal and a complimentary signal, respectively. The first transmission gate may be switched on/off, and a second ...
    • Systems and methods for fracture mapping via frequency-changing integrated chips 

      Babakhani, Aydin (2019-09-24)
      Systems and methods for fracture mapping may utilize frequency changing to aid in providing high-resolution mapping. Integrated chips may be injected into a well and dispersed into a formation. A downhole tool that provides ...
    • Systems and methods for monitoring cement quality in a cased well environment with integrated chips 

      Babakhani, Aydin (2020-01-07)
      A well monitoring system may provide a plurality of integrated chips dispersed in cement surrounding a well casing. Each of the integrated chips may provide energy harvesting circuitry, EM transceiver, modulator, additional ...
    • Wireless synchronization of mm-wave arrays 

      Chen, Charles; Babakhani, Aydin (2018-10-23)
      Systems and methods providing wireless synchronization of wave arrays may include an antenna that receives a wireless injection signal and another antenna that radiates a locked wave signal corresponding to the injection ...