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    DETECTION OF CONCEALED OBJECT ON A BODY USING RADIO FREQUENCY SIGNATURES ON FREQUENCIES AND POLARIZATIONS
    1.
    发明申请
    DETECTION OF CONCEALED OBJECT ON A BODY USING RADIO FREQUENCY SIGNATURES ON FREQUENCIES AND POLARIZATIONS 有权
    使用无线电频率检测对频率和极化的物体的隐蔽物体的检测

    公开(公告)号：US20150276920A1

    公开(公告)日：2015-10-01

    申请号：US14435158

    申请日：2013-10-09

    Applicant: RAYTHEON COMPANY

    Inventor： Jacob Kim ,  John L. Tomich ,  Raymond Samaniego ,  Howard C. Choe

    IPC: G01S7/41 ,  G01S7/02 ,  G01S13/88

    CPC classification number: G01S13/887 ,  G01S7/025 ,  G01S7/354 ,  G01S7/411 ,  G01S7/412

    Abstract: A method for detecting a concealed object in a target comprising a body and the concealed object, the method including emitting, by an emitter, radio frequency (RF) energy toward a direction of the target, receiving, by a receiver, a scattered RF energy reflected from the target, generating, by the receiver, a signal corresponding to the received scattered RF energy, comparing, by a processor, the signal with a plurality of stored RF scattering signatures, each of the RF scattering signatures being associated with an object of interest, and detecting, by the processor, the concealed object when the signal matches one of plurality of RF scattering signatures.

    Abstract translation: 一种用于检测包括主体和隐藏对象的目标中的隐藏对象的方法，所述方法包括通过发射器朝向所述目标的方向发射射频（RF）能量，由接收器接收散射的RF能量 从目标反射，由接收机产生对应于接收的散射RF能量的信号，通过处理器将信号与多个存储的RF散射特征进行比较，每个RF散射特征与 感兴趣并且当信号匹配多个RF散射签名中的一个时由处理器检测隐藏对象。

    Thermoacoustic transducer and methods for resonant generation and amplification of sound emission
    2.
    发明授权
    Thermoacoustic transducer and methods for resonant generation and amplification of sound emission 有权

    公开(公告)号：US10582310B1

    公开(公告)日：2020-03-03

    申请号：US15676340

    申请日：2017-08-14

    Applicant: Raytheon Company ,  Board of Regents, The University of Texas System

    Inventor： Howard C. Choe ,  Mikhail Kozlov

    IPC: H04R23/02 ,  H04R23/00

    Abstract: A transducer includes an acoustic reflector, an acoustic coupler and one or more thermoacoustic frames. The acoustic coupler is disposed proximate to an output of the transducer and each of the thermoacoustic frames is disposed between the acoustic reflector and the acoustic coupler. The thermoacoustic frames, the acoustic reflector and the acoustic coupler form a resonator with each of the thermoacoustic frames configured to emit a broadband acoustic signal in response to receiving electrical energy. Additionally, the resonator is configured to emit a narrowband acoustic signal at the transducer output in response to receiving the broadband acoustic signal. A method includes adjusting a frequency of the narrowband acoustic signal by controlling a spacing between the thermoacoustic frames and one or more components of the resonator. Thermoacoustic device embodiments capable of resonant emission of intense ultrasound radiation generated by sheets of multi-walled carbon nanotubes (MWNT) are also disclosed.

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