Patents by Inventor Erich T. Schlecht
Erich T. Schlecht has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10522891Abstract: A coupler for coupling electromagnetic radiation into a cavity, including a metal layer having a reflective surface and forming a ground plane; and one or more waveguides for gigahertz or terahertz electromagnetic radiation embedded in the metal layer. The waveguides each include two openings in the metal layer exposing a dielectric underneath; and a section of the metal layer between the two openings. A plurality of holes in the metal layer are disposed along a perimeter of the openings so as to shape the electric field of the electromagnetic radiation in a cavity coupled to the coupler.Type: GrantFiled: August 3, 2018Date of Patent: December 31, 2019Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Brian J. Drouin, Adrian Tang, Erich T. Schlecht
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Publication number: 20190044211Abstract: A coupler for coupling electromagnetic radiation into a cavity, including a metal layer having a reflective surface and forming a ground plane; and one or more waveguides for gigahertz or terahertz electromagnetic radiation embedded in the metal layer. The waveguides each include two openings in the metal layer exposing a dielectric underneath; and a section of the metal layer between the two openings. A plurality of holes in the metal layer are disposed along a perimeter of the openings so as to shape the electric field of the electromagnetic radiation in a cavity coupled to the coupler.Type: ApplicationFiled: August 3, 2018Publication date: February 7, 2019Applicant: California Institute of TechnologyInventors: Brian J. Drouin, Adrian Tang, Erich T. Schlecht
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Patent number: 9143084Abstract: A novel MMIC on-chip power-combined frequency multiplier device and a method of fabricating the same, comprising two or more multiplying structures integrated on a single chip, wherein each of the integrated multiplying structures are electrically identical and each of the multiplying structures include one input antenna (E-probe) for receiving an input signal in the millimeter-wave, submillimeter-wave or terahertz frequency range inputted on the chip, a stripline based input matching network electrically connecting the input antennas to two or more Schottky diodes in a balanced configuration, two or more Schottky diodes that are used as nonlinear semiconductor devices to generate harmonics out of the input signal and produce the multiplied output signal, stripline based output matching networks for transmitting the output signal from the Schottky diodes to an output antenna, and an output antenna (E-probe) for transmitting the output signal off the chip into the output waveguide transmission line.Type: GrantFiled: August 27, 2012Date of Patent: September 22, 2015Assignee: California Institute of TechnologyInventors: Jose Vicente Siles Perez, Goutam Chattopadhyay, Choonsup Lee, Erich T. Schlecht, Cecile D. Jung-Kubiak, Imran Mehdi
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Patent number: 8693973Abstract: A coplanar waveguide (CPW) based subharmonic mixer working at 670 GHz using GaAs Schottky diodes. One example of the mixer has a LO input, an RF input and an IF output. Another possible mixer has a LO input, and IF input and an RF output. Each input or output is connected to a coplanar waveguide with a matching network. A pair of antiparallel diodes provides a signal at twice the LO frequency, which is then mixed with a second signal to provide signals having sum and difference frequencies. The output signal of interest is received after passing through a bandpass filter tuned to the frequency range of interest.Type: GrantFiled: May 2, 2012Date of Patent: April 8, 2014Assignee: California Institute of TechnologyInventors: Goutam Chattopadhyay, Erich T. Schlecht, Choonsup Lee, Robert H. Lin, John J. Gill, Seth Sin, Imran Mehdi
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Publication number: 20130229210Abstract: A novel MMIC on-chip power-combined frequency multiplier device and a method of fabricating the same, comprising two or more multiplying structures integrated on a single chip, wherein each of the integrated multiplying structures are electrically identical and each of the multiplying structures include one input antenna (E-probe) for receiving an input signal in the millimeter-wave, submillimeter-wave or terahertz frequency range inputted on the chip, a stripline based input matching network electrically connecting the input antennas to two or more Schottky diodes in a balanced configuration, two or more Schottky diodes that are used as nonlinear semiconductor devices to generate harmonics out of the input signal and produce the multiplied output signal, stripline based output matching networks for transmitting the output signal from the Schottky diodes to an output antenna, and an output antenna (E-probe) for transmitting the output signal off the chip into the output waveguide transmission line.Type: ApplicationFiled: August 27, 2012Publication date: September 5, 2013Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Jose V. Siles, Goutam Chattopadhyay, Choonsup Lee, Erich T. Schlecht, Cecile Jung, Imran Mehdi
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Publication number: 20120280742Abstract: A coplanar waveguide (CPW) based subharmonic mixer working at 670 GHz using GaAs Schottky diodes. One example of the mixer has a LO input, an RF input and an IF output. Another possible mixer has a LO input, and IF input and an RF output. Each input or output is connected to a coplanar waveguide with a matching network. A pair of antiparallel diodes provides a signal at twice the LO frequency, which is then mixed with a second signal to provide signals having sum and difference frequencies. The output signal of interest is received after passing through a bandpass filter tuned to the frequency range of interest.Type: ApplicationFiled: May 2, 2012Publication date: November 8, 2012Applicant: California Institute of TechnologyInventors: Goutam Chattopadhyay, Erich T. Schlecht, Choonsup Lee, Robert H. Lin, John J. Gill, Seth Sin, Imran Mehdi
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Patent number: 7773205Abstract: A three-dimensional imaging radar operating at high frequency e.g., 670 GHz, is disclosed. The active target illumination inherent in radar solves the problem of low signal power and narrow-band detection by using submillimeter heterodyne mixer receivers. A submillimeter imaging radar may use low phase-noise synthesizers and a fast chirper to generate a frequency-modulated continuous-wave (FMCW) waveform. Three-dimensional images are generated through range information derived for each pixel scanned over a target. A peak finding algorithm may be used in processing for each pixel to differentiate material layers of the target. Improved focusing is achieved through a compensation signal sampled from a point source calibration target and applied to received signals from active targets prior to FFT-based range compression to extract and display high-resolution target images. Such an imaging radar has particular application in detecting concealed weapons or contraband.Type: GrantFiled: June 6, 2008Date of Patent: August 10, 2010Assignee: California Institute of TechnologyInventors: Ken B. Cooper, Goutam Chattopadhyay, Peter H. Siegel, Robert J. Dengler, Erich T. Schlecht, Imran Mehdi, Anders J. Skalare
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Publication number: 20080304044Abstract: A three-dimensional imaging radar operating at high frequency e.g., 670 GHz, is disclosed. The active target illumination inherent in radar solves the problem of low signal power and narrow-band detection by using submillimeter heterodyne mixer receivers. A submillimeter imaging radar may use low phase-noise synthesizers and a fast chirper to generate a frequency-modulated continuous-wave (FMCW) waveform. Three-dimensional images are generated through range information derived for each pixel scanned over a target. A peak finding algorithm may be used in processing for each pixel to differentiate material layers of the target. Improved focusing is achieved through a compensation signal sampled from a point source calibration target and applied to received signals from active targets prior to FFT-based range compression to extract and display high-resolution target images. Such an imaging radar has particular application in detecting concealed weapons or contraband.Type: ApplicationFiled: June 6, 2008Publication date: December 11, 2008Applicant: California Institute of TechnologyInventors: Ken B. Cooper, Goutam Chattopadhyay, Peter H. Siegel, Robert J. Dengler, Erich T. Schlecht, Imran Mehdi, Anders J. Skalare