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    Zero power micromechanical switch-based sensing and monitoring system
    1.
    发明授权
    Zero power micromechanical switch-based sensing and monitoring system 有权

    公开(公告)号：US12169145B2

    公开(公告)日：2024-12-17

    申请号：US17422861

    申请日：2020-01-21

    Applicant: Northeastern University

    Inventor： Matteo Rinaldi ,  Zhenyun Qian ,  Vageeswar Rajaram ,  Sungho Kang

    IPC: G01J5/00 ,  G01J5/02 ,  G01J5/03 ,  G01J5/08 ,  G01J5/0806

    Abstract: Zero-power system for remote monitoring of heat sources is provided. The systems detect failure indicators of remote equipment including power substations, oil rigs, large inaccessible machinery in a factory, and communications equipment. The systems also can be used to detect the presence of people in buildings or in other locations, so as to improve HVAC utilization in large buildings. When the zero-power monitoring systems detect heat sources, such as the presence of people, failure indicators, or a targeted environmental signal, a circuit is closed using the energy of the detected radiation, and activating an RFID tag, a radio transmitter, or an alarm. The monitoring systems can remain deployed and active for many years without the need for battery replacement.

    Solidly Mounted Bi-dimensional Mode Resonators
    8.
    发明公开
    Solidly Mounted Bi-dimensional Mode Resonators 审中-公开

    公开(公告)号：US20240356527A1

    公开(公告)日：2024-10-24

    申请号：US18639890

    申请日：2024-04-18

    Applicant: Northeastern University

    Inventor： Luca COLOMBO ,  Gabriel Giribaldi ,  Jack Guida ,  Siddhartha Ghosh ,  Cristian Cassella ,  Matteo Rinaldi

    IPC: H03H9/25 ,  H03H9/02

    CPC classification number: H03H9/25 ,  H03H9/02779

    Abstract: The present technology provides solidly-mounted, bi-dimensional mode acoustic resonators for use in high frequency electronic applications. The resonator devices are designed to constrain acoustic energy in the piezoelectric layer and electrodes. By concentration of the acoustic waves on the surface and reducing substrate leakage, the quality factor of the system is maintained, even at high frequencies where other resonators fail. The resonance frequency of the devices can be tuned in the 1-27 GHz range. Fabrication of the devices is simplified and cost reduced compared to similar technologies, because the piezoelectric layer is solidly supported and does not have to be released from the substrate.

    Microelectromechanical tunable delay line circuit
    9.
    发明授权
    Microelectromechanical tunable delay line circuit 有权

    公开(公告)号：US11381230B2

    公开(公告)日：2022-07-05

    申请号：US17368173

    申请日：2021-07-06

    Applicant: Northeastern University

    Inventor： Yao Yu ,  Matteo Rinaldi

    IPC: H03K5/14 ,  H03H9/15 ,  H03K5/145 ,  H03K5/00

    Abstract: Tunable delay circuit devices have an input port, an output port, at least three parallel paths connecting the input port and the output port, on each path, an input switch and an output switch, and on each path, a plurality of shunt resonant tanks connected between the input switch and the output switch, each shunt resonant tank periodically chargeable from the input port and dischargeable to the output port by operation of the input switch and the output switch.

    Aluminum nitride combined overtone resonators for the mmWave spectrum
    10.
    发明授权
    Aluminum nitride combined overtone resonators for the mmWave spectrum 有权

    公开(公告)号：US11258423B2

    公开(公告)日：2022-02-22

    申请号：US17069331

    申请日：2020-10-13

    Applicant: Northeastern University

    Inventor： Matteo Rinaldi ,  Guofeng Chen

    IPC: H03H9/02 ,  H03H9/64 ,  H03H9/46

    Abstract: A resonator system is provided in which a combined overtone resonator device is excited with a two-dimensional mode of mechanical vibration in a cross sectional plane of a piezoelectric plate in response to an alternating voltage applied through an interdigitated electrode. The cross sectional plane extends along the width direction and the thickness direction, and the two-dimensional mode of mechanical vibration is a two-dimensional combined overtone mode of second and third order asymmetrical Lamb-wave overtones.

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