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公开(公告)号：US11381112B2
公开(公告)日：2022-07-05
申请号：US16933784
申请日：2020-07-20
Applicant: California Institute of Technology
Inventor： Behrooz Abiri , Florian Bohn , Seyed Ali Hajimiri
Abstract: A power bank includes, in part, a rechargeable battery, a wireless power recovery unit adapted to receive power wirelessly, a battery charging circuit adapted to deliver the power recovered by the power recovery unit to the rechargeable battery, an output interface, and a voltage reconditioning circuit adapted to supply power from the rechargeable battery to the output interface for delivery to an external device. The wireless power recovery unit may include one or more of a multitude of photodiodes adapted to convert a coherent optical signal to electrical power, an acoustic transducer adapted to convert acoustic waves to an electrical power, an inductive coupling circuit adapted to convert time varying magnetic flux to electrical power, and an RF power recovery unit adapted to convert an RF signal to electrical power.
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公开(公告)号：US10942273B2
公开(公告)日：2021-03-09
申请号：US15896005
申请日：2018-02-13
Applicant: California Institute of Technology
Inventor： Seyed Mohammadreza Fatemi , Aroutin Khachaturian , Behrooz Abiri , Seyed Ali Hajimiri
Abstract: An optical phased array (OPA) includes, in part, a multitude of phase control elements disposed along N rows and M columns forming an N×M array. The phase control elements disposed along ith row are coupled to ith row signal line and phase control elements disposed along jth column are coupled to jth column signal line. The OPA further includes, in part, a row select block having N switches each configured to couple one of the N rows of the phase control elements to a digital-to-analog converter (DAC) in response to a row select signal. The OPA further includes, in part, a column select block having M switches each configured to couple one of the M rows of the phase control elements to a ground terminal in response to a column select signal.
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公开(公告)号：US20200227949A1
公开(公告)日：2020-07-16
申请号：US16776482
申请日：2020-01-29
Applicant: California Institute of Technology
Inventor： Behrooz Abiri , Aroutin Khachaturian , Seyed Ali Hajimiri
Abstract: A wireless laser power transfer system includes, in part, a transmitter and a receiver that form a wireless link. The transmitter, includes, in part, a first communication system, at least a first source of laser beam, and a controller adapted to vary power and direction of the laser beam and further to modulate the laser beam. The receiver includes, in part, a communication system adapted to establish a wireless link with the first communication system, at least a first photo-voltaic cell, and a controller adapted to demodulate and detect the power of the modulated laser beam received by the first photo-voltaic cell from the first source of laser beam. The system optionally includes at least a second source of laser beam controlled by the transmitter controller. The system optionally further includes a second photo-voltaic cell. The transmitter controller is further adapted to cause the second laser beam to strike the second photo-voltaic cell.
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公开(公告)号：US10673351B2
公开(公告)日：2020-06-02
申请号：US16004198
申请日：2018-06-08
Applicant: California Institute of Technology
Inventor： Seyed Ali Hajimiri , Behrooz Abiri , Florian Bohn
Abstract: A rectifying circuit includes, in part, first and second NMOS transistors, an impedance matching network, and an RF block circuit. The source and gate terminals of the first NMOS transistor respectively receive the ground potential and a biasing voltage. The second NMOS transistor has a gate terminal coupled to the drain terminal of the first NMOS transistor, a drain terminal coupled to the gate terminal of the first NMOS transistor, and a source terminal receiving the ground potential. The impedance matching network is disposed between the antenna and the drain terminals of the first and second NMOS transistors. The RF block circuit is coupled between the drain terminals of the first and second NMOS transistors and the output terminal of the rectifying circuit. The RF block circuit is adapted to prevent the RF signal from flowing into the output terminal of the rectifying circuit.
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公开(公告)号：US10382140B2
公开(公告)日：2019-08-13
申请号：US15616844
申请日：2017-06-07
Applicant: California Institute of Technology
Inventor： Seyed Mohammadreza Fatemi , Seyed Ali Hajimiri , Behrooz Abiri , Aroutin Khachaturian
Abstract: A sparse optical phased array transmitter/receiver includes, in part, a multitude of transmitting/receiving elements that are sparsely positioned. Accordingly, the transmitting/receiving elements are not uniformly distributed at equal distance intervals along a one-dimensional, two-dimensional, or a three-dimensional array. The positions of the transmitting/receiving elements may or may not conform to an ordered pattern.
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Patent Agency Ranking
公开(公告)号：US20190089460A1
公开(公告)日：2019-03-21
申请号：US15917536
申请日：2018-03-09
Applicant: California Institute of Technology
Inventor： Aroutin Khachaturian , Seyed Ali Hajimiri , Behrooz Abiri , Seyed Mohammadreza Fatemi
IPC: H04B10/40 , H04B10/11 , H04B10/112
Abstract: A co-prime transceiver attains higher fill factor, improved side-lobe rejection, and higher lateral resolution per given number of pixels. The co-prime transceiver includes in part, a transmitter array having a multitude of transmitting elements and a receiver array having a multitude of receiving elements. The distance between each pair of adjacent transmitting elements is a first integer multiple of the whole or fraction of the wavelength of the optical. The distance between each pair of adjacent receiving elements is a second integer multiple of the whole or fraction of the wavelength of the optical signal. The first and second integers are co-prime numbers with respect to one another. The transceiver is fully realizable in a standard planar photonics platform in which the spacing between the elements provides sufficient room for optical routing to inner elements.
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公开(公告)号：US09935712B2
公开(公告)日：2018-04-03
申请号：US14027129
申请日：2013-09-13
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Behrooz Abiri , Seyed Ali Hajimiri
IPC: H04B10/2575 , H03K3/42 , G02F1/21
CPC classification number: H04B10/2575 , G02F2001/212 , H03K3/42
Abstract: An opto-electrical oscillator includes, in part, first and second optical phase modulators, a coupler, an optical-to-electrical signal conversion circuit, and a control circuit. The first optical phase modulator modulates the phase of a first optical signal in response to a first feedback signal to generate a first phase modulated signal. The second optical phase modulator modulates the phase of a second optical signal in response to a second feedback signal to generate a second phase modulated signal. The first and second optical signals travel through first and second optical paths respectively and are generated from the same optical source. The optical-to-electrical signal conversion circuit receives an optical signal from the coupler and in response generates an electrical signal applied to the control circuit. The output signals of the control circuit cause the first and second feedback signals to be out of phase.
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公开(公告)号：US09900096B2
公开(公告)日：2018-02-20
申请号：US14489354
申请日：2014-09-17
Applicant: California Institute of Technology
Inventor： Seyed Ali Hajimiri , Firooz Aflatouni , Behrooz Abiri
IPC: H04B10/00 , H04B10/25 , H04B10/516
CPC classification number: H04B10/2504 , H04B10/00 , H04B10/516 , H04B2210/006
Abstract: An electro-optical circuit, includes in part, a modulator, a signal splitter, N signal paths each having one or more signal processing components, N photo-diodes and a signal combiner. The modulator modulates an optical signal using an electrical input signal. The splitter splits the modulated optical signal into N optical signals each delivered to a different one of the N paths for processing by the associated signal processing component(s). Each photo-diode converts an optical signal it receives from its associated optical signal processing component(s) to a current signal. The signal combiner combines the N current signals it receives from the N photo-diodes to generate an output current signal. The signal processing component(s) may be a variable optical delay component, a variable optical gain/attenuation component, or both thus enabling the output current signal to represent a filtered version of the electrical input signal.
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公开(公告)号：US09831951B2
公开(公告)日：2017-11-28
申请号：US14027129
申请日：2013-09-13
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Behrooz Abiri , Seyed Ali Hajimiri
IPC: H04B10/2575 , H03K3/42 , G02F1/21
Abstract: An opto-electrical oscillator includes, in part, first and second optical phase modulators, a coupler, an optical-to-electrical signal conversion circuit, and a control circuit. The first optical phase modulator modulates the phase of a first optical signal in response to a first feedback signal to generate a first phase modulated signal. The second optical phase modulator modulates the phase of a second optical signal in response to a second feedback signal to generate a second phase modulated signal. The first and second optical signals travel through first and second optical paths respectively and are generated from the same optical source. The optical-to-electrical signal conversion circuit receives an optical signal from the coupler and in response generates an electrical signal applied to the control circuit. The output signals of the control circuit cause the first and second feedback signals to be out of phase.
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公开(公告)号：US09621269B2
公开(公告)日：2017-04-11
申请号：US13952493
申请日：2013-07-26
Applicant: California Institute of Technology
Inventor： Steven Bowers , Firooz Aflatouni , Behrooz Abiri , Seyed Ali Hajimiri
IPC: H04B10/2575 , H04B10/90
CPC classification number: H04B10/2575 , H04B10/90 , H04B2210/006
Abstract: A multi-port radiator radiates electromagnetic signal in response to a beat frequency of a pair of optical signals. The radiator includes a multitude of optical paths each carrying an optical signal having first and second wavelengths. A multitude of frequency conversion elements convert the optical signals to electrical signals and deliver them to the radiator's multiple ports. The frequency of the electrical signals, and hence the frequency of the electromagnetic wave, is defined by the difference between the first and second wavelengths. The phases of the optical signals received by the frequency conversion elements are shifted with respect to one another. Optionally, the difference between the phases of the optical signals travelling through each pair of adjacent paths is 90°. The first and second wavelengths are generated by a pair of optical sources and are optionally modulated before being combined and delivered to the optical paths.
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