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1. 发明申请

US20190154790A1 METHOD FOR DETERMINING A RECEPTION DIRECTION OF A RADIO SIGNAL 审中-公开
公开(公告)号：US20190154790A1
公开(公告)日：2019-05-23
申请号：US16320624
申请日：2017-07-26
申请人： Continental Teves AG & Co. oHG
发明人： Sebastian Strunck
IPC分类号： G01S3/34 , G01S3/06 , G01S3/12 , G01S3/36
摘要： A method for determining a reception direction of a radio signal, wherein several antennas having different directional characteristics are used.

2. 发明授权

US5594448A Highly accurate RF-ID positioning system 失效
标题翻译：高精度RF-ID定位系统
公开(公告)号：US5594448A
公开(公告)日：1997-01-14
申请号：US356418
申请日：1994-12-15
申请人： Loek d'Hont
发明人： Loek d'Hont
IPC分类号： G01S3/30 , G01S3/36 , G01S13/75 , G01S13/82 , G06K7/00 , G06K7/10 , H01Q7/00 , G01S13/74
CPC分类号： G06K7/10346 , G01S3/30 , G01S3/36 , G06K7/0008 , H01Q7/00 , G01S13/753 , G01S13/82
摘要： A balanced receive antenna circuit configuration determines an accurate position of a transponder within the antenna field pattern of the reader antenna. The balanced receive antenna configuration consists of two antennas physically rotated 90 degrees relative to one another, disposed concentrically on top of one another. Furthermore, each receive antenna consists of two coils located a predetermined distance apart. The optimum distance separating the coils is determined by trading off zero position detection with the transponder detection range. A third receive reference antenna is concentrically disposed, sharing the same horizontal plane with the balanced antenna coilsets. The transmitter antenna is disposed separately from the receive antennas. In operation, initially the transmitter antenna sends a power burst signal for a predetermined duration to charge up the transponder to the maximum charge possible. Then for a very brief duration, the transmitter antenna is damped to permit the receive antennas to better receive the transponder response telegram. Then simultaneously, one receive antenna receives the `X` position component and the other receiver antenna receives the `Y` position component in the form of induced phase and voltages. Depending upon which quadrant of the antenna pattern the transponder is disposed, the phase and field effect voltage of the X component and the Y component is detected. These received voltages are then narrow band filtered around a center frequency and rectified via phase information received from the reference antenna. These rectified signals are then gated for a small portion of the length of the entire response telegram, and those outputs are combined in a signal processor which outputs the exact position data information.
摘要翻译：平衡的接收天线电路配置确定了应答器在读取器天线的天线场模式内的准确位置。平衡的接收天线配置由相对于彼此物理旋转90度的两个天线组成，彼此同心地设置。此外，每个接收天线由两个间隔开预定距离的线圈组成。分离线圈的最佳距离是通过使用应答器检测范围的零位置检测进行退出来确定的。第三接收参考天线同心设置，与平衡天线线圈共用相同的水平面。发射机天线与接收天线分开设置。在操作中，最初，发射机天线发送功率突发信号达预定的持续时间，以将应答器充电到可能的最大电荷。然后在非常短暂的持续时间内，发射机天线被衰减以允许接收天线更好地接收应答器响应电报。然后同时，一个接收天线接收“X”位置分量，另一个接收天线以感应相位和电压的形式接收“Y”位置分量。根据放置应答器的天线图案的哪个象限，检测X分量和Y分量的相位和场效应电压。然后将这些接收电压围绕中心频率进行窄带滤波，并通过从参考天线接收的相位信息进行整流。然后将这些整流信号选通整个响应报文长度的一小部分，并将这些输出组合在输出精确位置数据信息的信号处理器中。

3. 发明申请

US20210055366A1 ASSET LOCATION USING DIRECTION FINDING FEATURES 有权
公开(公告)号：US20210055366A1
公开(公告)日：2021-02-25
申请号：US17007930
申请日：2020-08-31
申请人： Cypress Semiconductor Corporation
发明人： Robert Hulvey
IPC分类号： G01S3/36 , G01S3/32 , H04B7/08 , H04W4/38
摘要： Systems, methods, and apparatus cause a first wireless device to transmit to a plurality of locator devices, an extended signal including a first segment and second segment. The first segment includes an indication for each of the plurality of locator devices to listen for a change in the extended signal from the first segment to the second segment. The second segment includes an indication for each of the plurality of locator devices to rotate through a plurality of antennas to receive the second segment via the plurality of antennas. Responsive to the transmitting of the extended signal, receiving direction data from each of the plurality of locator devices.

4. 发明授权

US10295647B1 Asset location using direction finding features 有权
公开(公告)号：US10295647B1
公开(公告)日：2019-05-21
申请号：US16021407
申请日：2018-06-28
申请人： Cypress Semiconductor Corporation
发明人： Robert Hulvey
IPC分类号： G01S3/36 , G01S3/32 , H04B7/08 , H04W4/38 , H04W84/18 , H04W76/14
摘要： Systems, methods, and devices are disclosed for enabling a mobile device with limited RF capability to obtain accurate directions for finding an object or asset via a multiple-antenna locator device. The mobile device generates a request to the locator device to obtain directions to find the asset. A request can also be made to obtain the mobile device's own location from the multiple-antenna locator device which has an antenna array and is in a fixed location that has good RF visibility. The locator device identifies the target asset and receives an RF signal from it using the antenna array. The signal is detected at each antenna and phase samples are recorded. The phase sample data is used in angle-related functions, such as angle of arrival and angle of departure algorithms to calculate the direction of the asset.

5. 发明授权

US09929790B2 Receiver circuit 有权
公开(公告)号：US09929790B2
公开(公告)日：2018-03-27
申请号：US15590421
申请日：2017-05-09
申请人： NXP B.V.
发明人： Wim van Houtum , Yan Wu
IPC分类号： H04B7/12 , H04B7/08 , G01S3/06 , G01S3/26 , G01S3/36 , G01S3/46 , G01S3/48
CPC分类号： H04B7/086 , G01S3/06 , G01S3/26 , G01S3/36 , G01S3/46 , G01S3/48 , H04B7/12
摘要： A receiver system comprising: an input terminal configured to receive input signalling comprising a plurality of antenna-signals, wherein the plurality of antenna-signals each comprise information that corresponds to a first-frequency-bin and a second-frequency-bin. AoA-blocks can determine a first-angle-of-arrival and a second-angle-of-arrival associated with the first- and second-frequency-bins. A first-weighting-determination-block configured to, based on the first-angle-of-arrival and the second-angle-of-arrival, either: set first-weighting-values as values for constructively combining the information that corresponds to the first-frequency-bins of the plurality of antenna-signals; or set first-weighting-values as values for destructively combining the information that corresponds to the first-frequency-bins of the plurality of antenna-signals.

6. 发明授权

US4638319A R.F. system 失效
标题翻译： R.F. 系统
公开(公告)号：US4638319A
公开(公告)日：1987-01-20
申请号：US621029
申请日：1984-06-15
申请人： Lye-Whatt Chua
发明人： Lye-Whatt Chua
IPC分类号： G01S3/36 , G01S3/48 , G01S5/02 , G01S13/46
CPC分类号： G01S3/48 , G01S3/36
摘要： A bearing indicating R.F. system comprising two spaced, broad-beam antennas supplying signals via power dividers to amplitude comparison means and phase comparison means, both operating without down-conversion to I.F. The main lobes of the radiation patterns of the antennas are inclined towards one another so that for non-normal incidence there is a difference between the amplitudes of signals received by the antennas. The amplitude comparison means comprises detector diodes, logarithmic amplifiers, and a first subtractor, the magnitude of the output signal (sensed with a threshold detector indicating which side of normal the radiation is incident. The phase comparison means comprises a hybrid ring having "sum" and "difference" output ports connected to an instantaneous frequency measuring apparatus and a detector diode, and further comprising logarithmic amplifiers and a second subtractor, the outputs of detector diodes in IFM being summed to provide a signal output connected to one amplifier. The output of the second subtractor is an accurate but ambiguous representation of the bearing angle with respect to normal (being an even function; the ambiguity can be resolved by reference to the output signal of the first subtractor which may also be used as an approximate representation of the bearing angle. Using broad-band R.F. components, the system may be operable over a broad bandwidth, e.g. an octave. A data comparator and a pulse repetition frequency filter control gates inhibiting the provision of bearing data except for pulsed incident radiation having desired frequency and PRF.
摘要翻译：表示R.F.的轴承系统包括两个间隔开的宽波束天线，其经由功率分配器向幅度比较装置和相位比较装置提供信号，两者都不下变频到I.F。天线的辐射图的主瓣彼此倾斜，使得对于非正常入射，天线接收的信号的振幅之间存在差异。幅度比较装置包括检测器二极管，对数放大器和第一减法器，输出信号的幅度（用阈值检测器指示辐射的正常侧入射），相位比较装置包括具有“和”的混合环，和“差分”输出端口连接到瞬时频率测量装置和检测器二极管，并且还包括对数放大器和第二减法器，将IFM中的检测器二极管的输出相加以提供连接到一个放大器的信号输出，第二减法器是相对于法线的轴承角度的准确但模糊的表示（作为偶数函数;可以通过参考第一减法器的输出信号来解决歧义，也可以将其用作轴承的近似表示使用宽带RF组件，该系统可以在宽带宽（例如八分之一）上操作 e。数据比较器和脉冲重复频率滤波器控制门禁止提供除了具有期望频率和PRF的脉冲入射辐射之外的承载数据。

7. 发明授权

US11579234B2 Interferometric direction-finding antenna array with multiplexed/switched radiating elements 有权
公开(公告)号：US11579234B2
公开(公告)日：2023-02-14
申请号：US16530082
申请日：2019-08-02
申请人： Rockwell Collins, Inc.
发明人： Jiwon L. Moran , James B. West
IPC分类号： G01S3/46 , G01S3/36 , H01Q21/29
摘要： A direction-finding antenna includes at least a first set of radiating elements configured to radiate at least a first wavelength (λ1) and a second set of radiating elements configured to radiate at a second wavelength (λ2) that is shorter than the first wavelength (λ1). The first set of radiating elements defines a first circle having a first radius. The second set of radiating elements defines a second circle having a second radius that is smaller than the first radius of the first circle. The direction-finding antenna further includes a transmission line-based multiplexer configured to selectively couple the first set of radiating elements or the second set of radiating elements to a radio frequency (RF) feed line, or a plurality of switches configured to selectively couple selected radiating elements of the first set of radiating elements or the second set of radiating elements to the RF feed line.

8. 发明申请

US20210349173A1 Interferometric Direction-Finding Antenna Array with Multiplexed/Switched Radiating Elements 有权
公开(公告)号：US20210349173A1
公开(公告)日：2021-11-11
申请号：US16530082
申请日：2019-08-02
申请人： Rockwell Collins, Inc.
发明人： Jiwon L. Moran , James B. West
IPC分类号： G01S3/46 , G01S3/36 , H01Q21/29
摘要： A direction-finding antenna includes at least a first set of radiating elements configured to radiate at least a first wavelength (λ1) and a second set of radiating elements configured to radiate at a second wavelength (λ2) that is shorter than the first wavelength (λ1). The first set of radiating elements defines a first circle having a first radius. The second set of radiating elements defines a second circle having a second radius that is smaller than the first radius of the first circle. The direction-finding antenna further includes a transmission line-based multiplexer configured to selectively couple the first set of radiating elements or the second set of radiating elements to a radio frequency (RF) feed line, or a plurality of switches configured to selectively couple selected radiating elements of the first set of radiating elements or the second set of radiating elements to the RF feed line.

9. 发明申请

US20190302216A1 ASSET LOCATION USING DIRECTION FINDING FEATURES 审中-公开
公开(公告)号：US20190302216A1
公开(公告)日：2019-10-03
申请号：US16376920
申请日：2019-04-05
申请人： Cypress Semiconductor Corporation
发明人： Robert Hulvey
IPC分类号： G01S3/36 , H04B7/08 , G01S3/32 , H04W4/38
摘要： Systems, methods, and apparatus receive a signal from a first wireless device through a first antenna, of a plurality of antennas, the signal including a first segment and a second segment. Responsive to detecting a change in the signal from the first segment to the second segment, embodiments traverse the plurality of antennas to receive the second segment through each of the plurality of antennas. Embodiments determine a plurality of phase samples, each associated with the second segment received through one of the plurality of antennas. Embodiment then use the plurality of phase samples to calculate direction data associated with the first wireless device.

10. 发明授权

US10416268B2 Multipolarized vector sensor array antenna system for search and rescue applications 有权
公开(公告)号：US10416268B2
公开(公告)日：2019-09-17
申请号：US15302063
申请日：2016-04-13
申请人： Massachusetts Institute of Technology
发明人： Alan J. Fenn , Beijia Zhang , Peter T. Hurst , Kenneth E. Kolodziej , Larry L. Retherford , Christian D. Austin
IPC分类号： G01S3/36 , G01S3/32 , G01S3/04 , G01S3/14 , H01Q25/02 , H01Q7/00 , G01S3/30 , H01Q3/40
摘要： The present disclosure is directed towards direction finding (DF) systems that can detect and locals a radio frequency (RF) signal (e.g. an emergency beacon) is two dimensions (i.e., azimuth and elevation). In one embodiment, a DF system comprises an array of multipolarized loop antennas coupled to a beamformer which provides monopole, dipole, and loop antenna element modal signals. The DF system may also comprise a multi-channel digital receiver system coupled to the beamformer. The multi-channel digital receiver system is configured to receive modal signals provided thereto from the beamformer which can be used for accurate two-dimensional geolocation of RF signals including, but not limited to, location of RF emergency beacon sources.

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