公开(公告)号：US20210408693A1

公开(公告)日：2021-12-30

申请号：US17289835

申请日：2019-10-16

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Go ITAMI ,  Yohei TORIUMI ,  Jun KATO

IPC: H01Q15/00 ,  H01Q15/14 ,  G06F30/39

Abstract: To accurately estimate frequency characteristics from structural parameters of a frequency selective surface. A frequency selective surface design apparatus includes an LC generation unit 20 that receives an input of a structural parameter, and generates an inductance L and a capacitance C of a unit cell, a corrected resonance point calculation unit 30 that receives the number n of times of calculation input from an outside, the inductance L, and the capacitance C, models a correction circuit by using a circuit in which a virtual capacitance is connected in parallel via a transmission line to each distribution inductance obtained by division of the inductance L by the calculation number n and the transmission line is terminated at the capacitance C, and calculates a corrected resonant frequency fC from the impedance of the correction circuit, and a characteristic calculation unit 40 that receives inputs of the inductance L, the capacitance C, and the corrected resonant frequency fC, calculates a pre-correction resonant frequency from the inductance L and the capacitance C, obtains a correction coefficient by dividing the corrected resonant frequency fC by the pre-correction resonant frequency, and calculates a corrected return loss and a corrected insertion loss.

公开(公告)号：US20240201418A1

公开(公告)日：2024-06-20

申请号：US18555288

申请日：2021-04-15

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Go ITAMI ,  Jun KATO

IPC: G01W1/04 ,  B63B35/44 ,  B63B35/50 ,  B63B79/15 ,  B64U10/60 ,  B64U50/35 ,  B64U101/00 ,  G05D1/678 ,  G05D105/80 ,  G05D107/00 ,  G05D109/25

CPC classification number: G01W1/04 ,  B63B35/50 ,  B63B79/15 ,  B64U10/60 ,  B64U50/35 ,  G05D1/678 ,  B63B2035/4453 ,  B64U2101/00 ,  B64U2201/202 ,  G05D2105/80 ,  G05D2107/27 ,  G05D2109/254

Abstract: A marine monitoring system includes a control device 1 and at least one flight vehicle 2. The control device 1 includes: a sensor unit 13 that measures at least one of an underwater environment and a sea-surface environment to acquire marine data; a control unit 16 that controls the flight vehicle 2; and a communication unit 15 that receives above-water data measured by the flight vehicle 2. The flight vehicle 2 includes a sensor unit 24 that measures an above-water environment according to control of the control device 1 to acquire the above-water data, and a communication unit 21 that transmits the above-water data to the control device 1.

公开(公告)号：US20240351713A1

公开(公告)日：2024-10-24

申请号：US18701729

申请日：2021-11-02

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Go ITAMI ,  Tsuneko KURA ,  Hiroshi MATSUBARA ,  Jun KATO

IPC: B64U50/38 ,  B60L53/12 ,  B60L53/30 ,  B63B35/44 ,  B64U101/00 ,  G05D1/656 ,  G05D105/80 ,  H02J50/12 ,  H02J50/90

CPC classification number: B64U50/38 ,  B60L53/12 ,  B60L53/30 ,  B63B35/44 ,  G05D1/656 ,  H02J50/12 ,  H02J50/90 ,  B60L2200/10 ,  B64U2101/00 ,  G05D2105/80

Abstract: A power feeding system 1 includes a floating body 11 having power and a control function and



an unmanned aerial vehicle 21 that observes environmental information using the floating body 11 as a base, in which the floating body 11 includes a power feeding device 12 that moves in a space below a top surface of the floating body 11 with reference to one of a plurality of planes arranged in a lattice shape on the floating body 11, roughly specifies a position of the unmanned aerial vehicle 21 in two dimensions based on a reflectance of an emitted radio wave, estimates and calculates a power feeding position of the unmanned aerial vehicle 21 based on a reflectance of an output light beam reflected on a reflector attached to a back surface corresponding to a power receiving position of the unmanned aerial vehicle 21, and feeds the unmanned aerial vehicle 21 with power at the power feeding position.