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公开(公告)号：US11621488B2
公开(公告)日：2023-04-04
申请号：US17052637
申请日：2019-05-14
申请人： NEC CORPORATION
发明人： Naoki Oshima
摘要： Provided are an array communication device that makes phase correction between a plurality of arrays having bi-directional amplifiers possible and a method for controlling the array communication device. This array communication device comprises a plurality of array units that are connected to a common signal processing unit and each comprise an antenna, amplifier, and phase shifter. The array communication device further comprises first-directional couplers that are respectively disposed between the antennas and amplifiers of the array units and divide or combine signals, second-directional couplers that are respectively disposed between the phase shifters of the array units and the signal processing unit and divide or combine signals, and phase comparison means that each receive at least one from among a signal from a first-directional coupler and a signal from a second-directional coupler and a signal serving as a phase reference and carry out phase comparison and correction.
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2.发明授权公开(公告)号：US11411663B2
公开(公告)日：2022-08-09
申请号：US16494805
申请日：2018-04-16
申请人： NEC Corporation
发明人： Keiichi Motoi , Naoki Oshima
摘要： In order to enable a reduction in the time required to calibrate the amplitude phase of an antenna device, this processing device is provided with: a setting unit group which performs setting from a predetermined three or more-valued phase value regarding the phase value of a signal received by each of a plurality of antenna elements or a signal transmitted from each of the antenna elements with respect to a calibration signal, on the basis of information extracted from one control information, and derives set signals that are signals on which the setting has been performed; and a computing unit which outputs a correlation value that is a value indicating a correlation between the sum of the set signals and the control information.
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公开(公告)号：US10998627B2
公开(公告)日：2021-05-04
申请号：US16757949
申请日：2018-10-23
发明人： Kenichi Okada , Keiichi Motoi , Naoki Oshima , Rui Wu , Jian Pang
摘要： A phase adjustment circuit includes: a local frequency band phase shifter that adjusts a phase of a signal in a local signal frequency band and that outputs the adjusted signal; a frequency-converting mixer that receives the adjusted signal and another signal different from the adjusted signal, and that mixes the adjusted signal with the other signal; and a buffer amplifier that is provided between the local frequency band phase shifter and the frequency-converting mixer, and that is capable of amplifying an input power that is to be input to the frequency-converting mixer so that the input power is up to be in an input power range in which an input-output characteristic of power of the frequency-converting mixer is out of a linear region.
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公开(公告)号：US10326515B2
公开(公告)日：2019-06-18
申请号：US15566802
申请日：2016-04-20
申请人： NEC Corporation
发明人： Naoki Oshima , Ikuma Ando
摘要： When a radio frequency (RF) unit is provided with a delay line or a switch, as the number of arrays (the number of antennas) increases, the parasitic capacitance of the antennas increases and the insertion loss of the switch increases. In addition, the insertion loss may further increase at high frequencies expected to be used in the future. An array antenna apparatus of the present invention is provided with: a plurality of antennas that receive signals; a plurality of down-converters that are connected respectively to the plurality of antennas and that down-convert the received signals; and a switch that selects at least one signal from among the plurality of down-converted signals, and transmits the at least one signal to an A/D converter.
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公开(公告)号：US11469524B2
公开(公告)日：2022-10-11
申请号：US17032171
申请日：2020-09-25
申请人： NEC CORPORATION
发明人： Naoki Oshima , Keiichi Motoi
摘要： A polarized wave shared array antenna 10A includes: planar antennas 11a and 11b, each of which generating two polarized waves of first and second polarized waves orthogonal to each other; feeding points 12a and 12b for generating the first polarized wave, which are provided in the planar antenna 11a, and feeding points 14a and 14b for generating the second polarized wave, which are provided in the planar antenna 11b; and an integrated circuit 20 including transmission and reception units 21a, 21b, 22a, and 22b connected to the respective feeding points 12a, 12b, 14a, and 14b via wirings, in which in a plan view, with respect to an axis A1, the feeding points 12a and 14a, respectively, are disposed symmetrical to the feeding points 12b and 14b, and the transmission and reception units 21a and 22a, respectively, are disposed symmetrical to the transmission and reception units 21b and 22b.
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公开(公告)号：US11196506B2
公开(公告)日：2021-12-07
申请号：US16648519
申请日：2018-09-21
申请人： NEC Corporation
发明人： Naoki Oshima , Shinichi Hori
摘要： An interference signal generation device includes a first converter configured to perform conversion on a frequency of an input signal based on a center frequency of a frequency band to be interfered, and a second converter configured to further perform conversion on a frequency of an output signal of the first converter based on the center frequency.
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公开(公告)号：US11158945B2
公开(公告)日：2021-10-26
申请号：US17032302
申请日：2020-09-25
申请人： NEC Corporation
发明人： Korkut Tokgoz , Naoki Oshima , Kazuaki Kunihiro
IPC分类号： H04M1/00 , H01Q3/40 , H04B7/0452 , H01Q1/24
摘要： A phased array antenna apparatus 10 according to an example embodiment includes at least four patch antennas 6 arranged in a two-dimensional array, and a semiconductor IC 1 connected to the patch antennas 6, in which the semiconductor IC 1 includes at least two first input/output terminals 5 through which a transmission/reception signal is input/output between the phased array antenna apparatus and an external apparatus connected to the phased array antenna apparatus, a plurality of second input/output terminals 4 connected to feeding points 8 of the patch antennas 6 through respective feed lines 7, the plurality of second input/output terminals being terminals through which the transmission/reception signal is input/output, and a matrix switch 2 capable of changing a connection relation between the first input/output terminals 5 and the second input/output terminals 4.
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公开(公告)号：US10033348B2
公开(公告)日：2018-07-24
申请号：US15502028
申请日：2015-05-26
申请人： NEC CORPORATION
发明人： Naoki Oshima
摘要： There is provided a variable RF filter receiving an input differential radio frequency signal from a differential input terminals and allowing a radio frequency signal around a desired frequency to pass therethrough, wherein first passive mixers driven by a rectangular wave clock signal having an arbitrarily determined frequency are connected in parallel to a signal line across the differential input terminals and differential output terminals, and wherein a load of each of the first passive mixers is configured by inductors. Further, as a clock signal driving each of the first passive mixers, an odd-multiple-wave Lo signal (for example, a triple-wave Lo signal) is used, the signal having a frequency odd-multiple times (for example, three times) as high as that of the Lo signal which is the fundamental wave of the passing radio frequency signal.
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公开(公告)号：US11355867B2
公开(公告)日：2022-06-07
申请号：US16910761
申请日：2020-06-24
申请人： NEC Corporation
发明人： Naoki Oshima
摘要： A polarized wave shared array antenna according to an example embodiment includes: antenna elements 11a and 11b provided adjacent to each other on one surface of an antenna substrate 1, each of which being configured to generate two orthogonal linear polarized waves; feeding points 12a and 12b disposed in a first direction when viewed from each antenna element and feeding points 14a and 14b disposed in a second direction orthogonal to the first direction when viewed from each antenna element; transmission and reception units 21a, 21b, 22a, and 22b that are provided on an integrated circuit on the other surface of the antenna substrate 1 and are respectively connected to the feeding points, in which in a plan view, the feeding points are disposed so as to be arranged on a straight line, and wirings connecting the transmission and transmission units to the corresponding feeding points are equal in length.
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公开(公告)号：US11081791B2
公开(公告)日：2021-08-03
申请号：US16342624
申请日：2017-07-13
申请人： NEC Corporation
发明人： Naoki Oshima
摘要： The present invention is provided with: a plurality of antenna units each including a plurality of antenna elements and a partial synthesizer that synthesizes first output signals of the respective antenna elements and outputs a second output signal; a partial power detection means that measures signal intensities of the respective second output signals; a position determination unit that determines the position of a communication device serving as a communication target based on the measured signal intensities of the respective second output signals; a summing synthesizer that synthesizes the second output signals of the plurality of antenna units and outputs a third output signal; and a phase control unit that controls phases of the respective antenna elements such that a main lobe, which is a beam having a maximum signal intensity for the third output signal, is directed to the position of the communication device determined by the position determination unit.
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