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公开(公告)号：US10411351B2
公开(公告)日：2019-09-10
申请号：US15551814
申请日：2016-02-01
申请人： NEC CORPORATION
发明人： Tomoya Kaneko , Eiji Hankui , Hiroshi Toyao , Keishi Kosaka
摘要： To provide a compact antenna capable of corresponding to a plurality of frequency bands. In a first frequency characteristic adjustment unit, the susceptance thereof varies according to a frequency of an input signal. A second frequency characteristic adjustment unit is connected to the first frequency characteristic adjustment unit and the reactance thereof varies according to the frequency of the input signal. A third frequency characteristic adjustment unit is connected to the second frequency characteristic adjustment unit, the susceptance thereof varies according to the frequency of the input signal. A feeding unit is configured to input a signal of any frequency in a plurality of different frequencies to the second frequency characteristic adjustment unit. A sign of the reactance of the second frequency characteristic adjustment unit at the frequency of the signal input from the feeding unit is the same as those of the susceptances of the first frequency characteristic adjustment unit and the third frequency characteristic adjustment unit.
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公开(公告)号：US11095038B2
公开(公告)日：2021-08-17
申请号：US16757040
申请日：2017-10-23
申请人： NEC Corporation
发明人： Yoshiaki Kasahara , Eiji Hankui , Hiroshi Toyao , Keishi Kosaka , Mingqi Wu
摘要： The present invention provides a polarization control plate including n layers (n≥4) of overlapping admittance sheets (10-1 to 10-6) each of which includes a plurality of plane unit cells, in which an admittance of a first plane unit cell included in an admittance sheet in a layer a (1≤a≤n) and an admittance of a second plane unit cell being included in an admittance sheet in a layer b (1≤b≤n and b≠a) and overlapping the first plane unit cell are different from each other, and an admittance of the plane unit cell in an x direction and an admittance of the plane unit cell in a y direction are different from each other.
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公开(公告)号：USD926736S1
公开(公告)日：2021-08-03
申请号：US29709368
申请日：2019-10-14
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公开(公告)号：US10930989B2
公开(公告)日：2021-02-23
申请号：US16086094
申请日：2017-03-27
申请人： NEC Corporation
发明人： Takahide Yoshida , Hiroshi Toyao , Eiji Hankui
摘要： It has been difficult to suppress electromagnetic wave that propagates within a suspended substrate. The structure according to the present invention is provided with: a first conductor plane and a second conductor plane that are disposed parallel to each other; a dielectric plane that is disposed between the first and second conductor planes via a hollow region so as to be parallel to the first and second conductor planes; a first transmission line disposed on a surface that is of the dielectric plane and that opposes the first conductor plane; and a second transmission line disposed on a surface that is of the dielectric plane and that opposes the second conductor plane, wherein the first transmission line and the second transmission line are electrically connected to each other.
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公开(公告)号：USD927468S1
公开(公告)日：2021-08-10
申请号：US29709359
申请日：2019-10-14
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公开(公告)号：US11431098B2
公开(公告)日：2022-08-30
申请号：US17052605
申请日：2018-06-28
申请人： NEC CORPORATION
发明人： Mingqi Wu , Keishi Kosaka , Eiji Hankui
摘要： An object is to advantageously control a phase of an electromagnetic wave with high efficiency at target operational frequency band. A phase control device (10) comprising a two-dimensional array of three-dimensional units (101) and configured to shift a phase of an electromagnetic wave passing through the three-dimensional units (101). The two nearest three-dimensional units (101) having same phase shift coverage are configured such that the distance difference from phase center of the phase control device (10) to the units (101) is a wavelength of a reference frequency fk, and the reference frequency fk is higher than center frequency fc of operational frequency band and not higher than the highest frequency fh of the operational frequency band.
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公开(公告)号：US11245195B2
公开(公告)日：2022-02-08
申请号：US16757058
申请日：2017-10-23
申请人： NEC Corporation
发明人： Yoshiaki Kasahara , Eiji Hankui , Hiroshi Toyao , Keishi Kosaka , Mingqi Wu
摘要： The present invention provides a phase control plate including n layers (n≥4) of overlapping admittance sheets (10-1 to 10-6) each of which includes a plurality of plane unit cells, in which an admittance of a first plane unit cell included in an admittance sheet in a layer a (1≤a≤n) and an admittance of a second plane unit cell being included in an admittance sheet in a layer b (1≤b≤n and b≠a) and overlapping the first plane unit cell are different from each other.
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