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    Metamaterial-based phase shifting element and phased array
    8.
    发明授权
    Metamaterial-based phase shifting element and phased array 有权

    公开(公告)号：US09972877B2

    公开(公告)日：2018-05-15

    申请号：US14330977

    申请日：2014-07-14

    Applicant: Palo Alto Research Center Incorporated

    Inventor： Bernard D. Casse ,  Armin R. Volkel ,  Victor Liu ,  Alexander S. Tuganov

    IPC: H01P1/18 ,  H01Q3/36 ,  H01Q3/46 ,  H01Q21/06 ,  H01Q21/08

    CPC classification number: H01P1/184 ,  H01Q3/36 ,  H01Q3/46 ,  H01Q21/065 ,  H01Q21/08

    Abstract: A metamaterial-based phase shifting element utilizes a variable capacitor (varicap) to control the effective capacitance of a metamaterial structure in order to control the phase of a radio frequency output signal generated by the metamaterial structure. The metamaterial structure is configured to resonate at the same radio wave frequency as an incident input signal (radiation), whereby the metamaterial structure emits the output signal by way of controlled scattering the input signal. A variable capacitance applied on metamaterial structure by the varicap is adjustable by way of a control voltage, whereby the output phase is adjusted by way of adjusting the control voltage. The metamaterial structure is constructed using inexpensive metal film or PCB fabrication technology including an upper metal “island” structure, a lower metal backplane layer, and a dielectric layer sandwiched therebetween. The varicap is connected between the island structure and a base metal structure that surrounds the island structure.

    Multiband radio frequency (RF) energy harvesting with scalable antenna
    9.
    发明授权
    Multiband radio frequency (RF) energy harvesting with scalable antenna 有权

    公开(公告)号：US09935370B2

    公开(公告)日：2018-04-03

    申请号：US14582033

    申请日：2014-12-23

    Applicant: Palo Alto Research Center Incorporated

    Inventor： Bernard D. Casse ,  George Daniel ,  Armin R. Volkel ,  Victor Liu

    IPC: H01F27/42 ,  H01Q5/25 ,  H01Q1/24 ,  H01Q9/26 ,  H02J50/27

    CPC classification number: H01Q5/25 ,  H01Q1/248 ,  H01Q9/26 ,  H02J50/27

    Abstract: A radio frequency (RF) energy harvesting device including a scalable metamaterial resonator antenna and a rectifying circuit formed on a flexible plastic substrate. The metamaterial resonator antenna includes a metal (e.g., silver) structure that is conformally fixedly disposed (i.e., either printed or deposited/etched) on the flexible substrate and configured to resonate at RF frequencies using primary and secondary antenna segments connected by linking segments such that captured RF signals are generated at two antenna end points that are 180° out-of-phase with each other. The rectifying circuit including additional metal structures that are also printed or otherwise formed on the flexible substrate, and one or more circuit elements that are configured to pass positive voltage pulses from the captured RF signals to an output node. Various metamaterial resonator antenna configurations are disclosed.

    Solar Power Harvesting System With Metamaterial Enhanced Solar Thermophotovoltaic Converter (MESTC)
    10.
    发明申请
    Solar Power Harvesting System With Metamaterial Enhanced Solar Thermophotovoltaic Converter (MESTC) 有权
    太阳能光伏收购系统采用超材料增强型太阳能光伏转换器（MESTC）

    公开(公告)号：US20150228827A1

    公开(公告)日：2015-08-13

    申请号：US14180346

    申请日：2014-02-13

    Applicant: Palo Alto Research Center Incorporated

    Inventor： Bernard D. Casse

    IPC: H01L31/04

    CPC classification number: B82Y40/00 ,  B82Y20/00 ,  B82Y30/00 ,  G02B5/008 ,  G02B5/1809 ,  H02S10/30

    Abstract: A solar power system includes a sunlight concentrating system (e.g., a heliostat), a thermophotovoltaic (TPV) converter and a thermal power system. The TPV converter includes a metamaterial emitter formed on a box-like enclosure, and an associated photovoltaic (PV) cell. The sunlight concentrating system directs the concentrated sunlight through an inlet opening of the box-like enclosure to heat the metamaterial emitter above 1000° K. Bull's eye structures formed on outward-facing surfaces of the box-like enclosure utilize concentric circular ridges spaced at a fixed grating period that, when heated, generate a radiant energy beam having a peak emission wavelength roughly equal to the grating period. The PV cell converts the radiant energy to produce primary electrical energy. Unconverted solar “waste” heat energy exits the box-like enclosure and is converted by the thermal power system (e.g., using a steam generator) to produce secondary electrical energy.

    Abstract translation: 太阳能发电系统包括太阳光聚光系统（例如定日镜），热光伏（TPV）转换器和火力发电系统。 TPV转换器包括形成在盒状外壳上的超材料发射器和相关联的光伏（PV）单元。 太阳光集中系统将集中的太阳光引导通过盒状外壳的入口，以将超材料发射器加热到1000°K以上。形成在盒状外壳的向外表面上的公牛眼结构利用间隔开的同心圆脊 固定光栅周期，当被加热时，产生具有大致等于光栅周期的峰值发射波长的辐射能束。 PV电池转换辐射能以产生初级电能。 未转换的太阳能“废物”热能离开盒状外壳并由火力发电系统（例如，使用蒸汽发生器）转换以产生次级电能。

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