公开(公告)号：WO2013009283A1

公开(公告)日：2013-01-17

申请号：PCT/US2011/043405

申请日：2011-07-08

Applicant: CORNING CABLE SYSTEMS LLC ,  BERLIN, Igor ,  CUNE, William P. ,  SAUER, Michael ,  SCHMIDT, Gerald B. ,  SCHWEIKER, Wolfgang ,  KEDZIORA, Jessica J.

Inventor： BERLIN, Igor ,  CUNE, William P. ,  SAUER, Michael ,  SCHMIDT, Gerald B. ,  SCHWEIKER, Wolfgang ,  KEDZIORA, Jessica J.

IPC: H04B10/12

CPC classification number: H04B10/25754 ,  H04B10/25756

Abstract: Optical fiber-based distributed antenna systems that support multiple-input, multiple-output (MIMO) antenna configurations and communications. Embodiments disclosed herein include optical fiber-based distributed antenna system that can be flexibly configured to support or not support MIMO communications configurations. In one embodiment, first and second MIMO communication paths are shared on the same optical fiber using frequency conversion to avoid interference issues, wherein the second communication path is provide to a remote extension unit to remote antenna unit. In another embodiment, the optical fiber-based distributed antenna systems may be configured to allow to provide MIMO communication configurations with existing components. Existing capacity of system components are employed to create second communication paths for MIMO configurations, thereby reducing overall capacity, but allowing avoidance of frequency conversion components and remote extension units.

Abstract translation: 支持多输入多输出（MIMO）天线配置和通信的基于光纤的分布式天线系统。 本文公开的实施例包括可以灵活地配置为支持或不支持MIMO通信配置的基于光纤的分布式天线系统。 在一个实施例中，使用频率转换在同一光纤上共享第一和第二MIMO通信路径以避免干扰问题，其中第二通信路径提供给远程扩展单元到远程天线单元。 在另一个实施例中，基于光纤的分布式天线系统可以被配置为允许向现有组件提供MIMO通信配置。 采用系统组件的现有容量来创建用于MIMO配置的第二通信路径，从而降低总体容量，但允许避免变频组件和远程扩展单元。

公开(公告)号：WO2021236192A2

公开(公告)日：2021-11-25

申请号：PCT/US2021/019727

申请日：2021-02-25

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  BARRY, John F. ,  KEDZIORA, Jessica ,  STEINECKER, Matthew ,  MOULTON, Peter ,  O'KEEFFE, Michael F. ,  SCHLOSS, Jennifer ,  EISENACH, Erik R. ,  MAJUMDER, Jonah A. ,  PHAM, Linh M. ,  BRAJE, Danielle A.

Inventor： BARRY, John F. ,  KEDZIORA, Jessica ,  STEINECKER, Matthew ,  MOULTON, Peter ,  O'KEEFFE, Michael F. ,  SCHLOSS, Jennifer ,  EISENACH, Erik R. ,  MAJUMDER, Jonah A. ,  PHAM, Linh M. ,  BRAJE, Danielle A.

IPC: G01R33/24 ,  G01R33/00 ,  G01R33/032 ,  G01R33/60 ,  G01R33/345 ,  G01R33/0041 ,  H01P1/18 ,  H01P3/06 ,  H01P5/18 ,  H01P7/10 ,  H03B5/18 ,  H03B5/1864

Abstract: We have developed a high-performance, low-volume, low-weight, and low-power sensor based on a self-sustaining oscillator. The techniques described here may be used for sensing various fields; we demonstrate magnetic sensing. The oscillator is based on a dielectric resonator that contains paramagnetic defects and is connected to a sustaining amplifier in a feedback loop. The resonance frequency of the dielectric resonator shifts in response to changes in the magnetic field, resulting in a shift in the frequency of the self-sustaining oscillator. The value of the magnetic field is thereby encoded in the shift or modulation output of the self-sustaining oscillator. The sensor as demonstrated uses no optics, no input microwaves, and, not including digitization electronics, consumes less than 300 mW of power and exhibits a sensitivity at or below tens of pT/√Hz. In some implementations, the sensor is less than 1 mL in volume.

公开(公告)号：WO2022019990A2

公开(公告)日：2022-01-27

申请号：PCT/US2021/031911

申请日：2021-05-12

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  BARRY, John F. ,  IRION, Reed Anderson ,  KEDZIORA, Jessica ,  STEINECKER, Matthew ,  FREEMAN, Daniel K. ,  BRAJE, Danielle A.

Inventor： BARRY, John F. ,  IRION, Reed Anderson ,  KEDZIORA, Jessica ,  STEINECKER, Matthew ,  FREEMAN, Daniel K. ,  BRAJE, Danielle A.

IPC: G01R33/02 ,  G06F3/046 ,  H03B15/00 ,  G01R33/022 ,  G01R33/1284 ,  G01R33/24 ,  H03B15/006

Abstract: Ferrimagnetic oscillator magnetometers do not use lasers to stimulate fluorescence emission from defect centers in solid-state hosts (e.g., nitrogen vacancies in diamonds). Instead, in a ferrimagnetic oscillator magnetometer, the applied magnetic field shifts the resonance of entangled electronic spins in a ferrimagnetic crystal. These spins are entangled and can have an ensemble resonance linewidth of approximately 370 kHz to 10 MHz. The resonance shift produces microwave sidebands with amplitudes proportional to the magnetic field strength at frequencies proportional to the magnetic field oscillation frequency. These sidebands can be coherently averaged, digitized, and coherently processed, yielding magnetic field measurements with sensitivities possibly approaching the spin projection limit of 1 attotesla/√Hz. The encoding of magnetic signals in frequency rather than amplitude relaxes or removes otherwise stringent requires on the digitizer.