MOLECULAR ATOMIC CLOCK WITH WAVE PROPAGATING ROTATIONAL SPECTROSCOPY CELL

    公开(公告)号:US20200272107A1

    公开(公告)日:2020-08-27

    申请号:US16871835

    申请日:2020-05-11

    Abstract: A clock apparatus includes: (a) a gas cell, including a continuous path cavity including a sealed interior for providing a signal waveguide; (b) an apparatus for providing an electromagnetic wave to travel along the continuous path cavity and for circulating around the continuous path cavity back toward and past a point of entry of the electromagnetic wave in the continuous path cavity; (c) a dipolar gas inside the sealed interior of the cavity; and (d) receiving apparatus for detecting an amount of energy in the electromagnetic wave, wherein the amount of energy is responsive to an amount of absorption of the electromagnetic wave as the electromagnetic wave passes through the dipolar gas.

    MILLIMETER WAVE CHIP SCALE ATOMIC CLOCK
    136.
    发明申请

    公开(公告)号:US20200241480A1

    公开(公告)日:2020-07-30

    申请号:US16844819

    申请日:2020-04-09

    Abstract: A clock generator includes a hermetically sealed cavity and clock generation circuitry. A dipolar molecule that exhibits a quantum rotational state transition at a fixed frequency is disposed in the cavity. The clock generation circuitry is configured to generate an output clock signal based on the fixed frequency of the dipolar molecule. The clock generation circuitry includes a detector circuit, a multiplier, and reference oscillator control circuitry. The detector circuit is coupled to the cavity, and is configured to generate a detection signal representative of an amplitude of a signal at an output of the cavity. The multiplier is coupled to the detector circuit, and is configured to multiply the detection signal with a mixing signal to produce a derivative of the detection signal. The reference oscillator control circuitry is configured to set a frequency of a reference oscillator based on the derivative of the detection signal.

    Hermetically sealed molecular spectroscopy cell with buried ground plane

    公开(公告)号:US10424523B2

    公开(公告)日:2019-09-24

    申请号:US15697505

    申请日:2017-09-07

    Abstract: A method for forming a sealed cavity includes bonding a non-conductive structure to a first substrate to form a non-conductive aperture into the first substrate. On a surface of the non-conductive structure opposite the first substrate, the method includes depositing a first metal layer. The method further includes patterning a first iris in the first metal layer, depositing a first dielectric layer on a surface of the first metal layer opposite the non-conductive structure, and patterning an antenna on a surface of the first dielectric layer opposite the first metal layer. The method also includes creating a cavity in the first substrate, depositing a second metal layer on a surface of the cavity, patterning a second iris in the second metal layer, and bonding a second substrate to a surface of the first substrate opposite the non-conductive structure to thereby seal the cavity.

    Material detection and analysis using a dielectric waveguide

    公开(公告)号:US10416095B2

    公开(公告)日:2019-09-17

    申请号:US16024028

    申请日:2018-06-29

    Abstract: A dielectric waveguide (DWG) may be used to identify a composition of a material that is in contact with the DWG. A radio frequency (RF) signal is transmitted into a dielectric waveguide located in contact with the material. The RF signal is received after it passes through the DWG. An insertion loss of the DWG is determined. The presence of the material may be inferred when the insertion loss exceeds a threshold value. The composition of the material may be inferred based on a correlation with the insertion loss. Alternatively, a volume of the material may be inferred based on a correlation with the insertion loss.

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