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Patent Agency Ranking
公开(公告)号：US20250112807A1
公开(公告)日：2025-04-03
申请号：US18904924
申请日：2024-10-02
Applicant: California Institute of Technology
Inventor： Adrian J. Tang , Goutam Chattopadhyay , Omkar Pradhan , Subash Khanal
Abstract: A circuit comprising a first Fourier Transform block operable to perform a Fourier Transform and having a first input configured for receiving an I signal and a second input configured for receiving a Q signal; a first plurality of n of outputs for I channels and Q channels each comprising a different frequency bin output from the Fourier Transform; I and Q summing blocks comprising a set of connector lines connecting an ith one of I channels with an ith one of the Q channels; an inverse Fourier Transform block connected to the summing blocks and operable to perform an inverse Fourier Transform; a correlator for correlating the outputs of the inverse Fourier Transform; a Fourier Transform block for Fourier Transforming the correlator output; a comparator for comparing the correlation term to zero; and an error correction circuit for tuning the magnitude and phase of the I and Q channels using the comparator output as feedback.
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公开(公告)号：US12191552B2
公开(公告)日：2025-01-07
申请号：US17846971
申请日：2022-06-22
Applicant: California Institute of Technology
Inventor： Goutam Chattopadhyay , Jacob W. Kooi , Choonsup Lee , Sofia Rahiminejad , Subash Khanal
Abstract: A waveguide based variable attenuator device including one or more attenuators each including a porous dielectric material; and a metal coating on the top of the dielectric material; and an actuator coupled to the attenuator. The actuator is configured to position, with nanometer resolution, the one or more attenuators in a waveguide configured and dimensioned to guide an electromagnetic wave having a frequency in a range of 100 gigahertz (GHz) to 1 terahertz (THz). The actuator controls at least one of a position or a volume of the one attenuator inserted in the waveguide to achieve a variable or pre-determined attenuation of the electromagnetic wave transmitted through waveguide.
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公开(公告)号：US20240426660A1
公开(公告)日：2024-12-26
申请号：US18749191
申请日：2024-06-20
Applicant: California Institute of Technology
Inventor： Goutam Chattopadhyay , Sven L. Van Berkel , Subash Khanal , Conner K. Ballew
Abstract: A device including a stack of silicon meta-optical layers forming a meta-material comprising an input surface for receiving terahertz electromagnetic radiation, an output surface for outputting a plurality of beams of the electromagnetic radiation; and a spatially varying permittivity varying with sub-wavelength precision across a volume of the stack, wherein the spatially varying permittivity is configured to focus different spectral bands of the electromagnetic radiation into different spatially separated electromagnetic modes.
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公开(公告)号：US20220407200A1
公开(公告)日：2022-12-22
申请号：US17846971
申请日：2022-06-22
Applicant: California Institute of Technology
Inventor： Goutam Chattopadhyay , Jacob W. Kooi , Choonsup Lee , Sofia Rahiminejad , Subash Khanal
Abstract: A waveguide based variable attenuator device including one or more attenuators each including a porous dielectric material; and a metal coating on the top of the dielectric material; and an actuator coupled to the attenuator. The actuator is configured to position, with nanometer resolution, the one or more attenuators in a waveguide configured and dimensioned to guide an electromagnetic wave having a frequency in a range of 100 gigahertz (GHz) to 1 terahertz (THz). The actuator controls at least one of a position or a volume of the one attenuator inserted in the waveguide to achieve a variable or pre-determined attenuation of the electromagnetic wave transmitted through waveguide.
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公开(公告)号：US20220267140A1
公开(公告)日：2022-08-25
申请号：US17675562
申请日：2022-02-18
Applicant: California Institute of Technology
Inventor： Goutam Chattopadhyay , Cecile D. Jung-Kubiak , Sofia Rahiminejad , Subash Khanal , Sven L. Van Berkel
IPC: B81B3/00
Abstract: A phased array system comprising an array of antennas outputting or receiving electromagnetic radiation to or from a steerable direction, wherein the electromagnetic radiation is at submillimeter wavelengths. The system further comprises a plurality of waveguides outputting or receiving the signals to or from the antennas, each of the waveguides with individual phase tuning. The waveguides are configured and dimensioned to guide an electromagnetic wave comprising the signals having a frequency in a range of 100 gigahertz (GHz) to 1000 terahertz (THz). The system further comprises means for phase shifting the signal by means of shifting or varying one or more phases of the signals relative to one another so as to vary, steer, or scan a direction of the electromagnetic radiation.
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