公开(公告)号：US11592515B2

公开(公告)日：2023-02-28

申请号：US16639213

申请日：2018-08-22

Applicant: Mitsubishi Electric Corporation

Inventor： Masanobu Horimoto ,  Fumiyoshi Murase ,  Makoto Yamaguchi

IPC: G01S5/02 ,  G01S3/48 ,  H01Q3/08 ,  H01Q25/02 ,  G01S3/72 ,  G01S3/38 ,  G01S3/06

Abstract: The present disclosure obtains a correction value that corrects measurement angle error signals more accurately than conventional methods even in a case where a radio wave signal-to-noise ratio is low, and thus tracks a communication counterpart more accurately than the conventional methods.
The present disclosure includes a program controller 28 that generates a command value of an orientation direction of an antenna 1 and outputs the generated command value to an antenna drive controller 27, the command value being changed in accordance with a predetermined change scenario 54; a correction value calculator 32 that calculates a phase correction value γ, based on at least three pieces of error measurement data 55 including (i) an arrival direction error obtained from a sum signal and a difference signal of reception signals, the arrival direction error representing a difference between the orientation direction and an arrival direction being a direction from which the radio waves come and arrive and (ii) an orientation direction actual measurement value being an actual measurement value of the orientation direction when the arrival direction error is obtained, the phase correction value γ being an angle by which the arrival direction error is rotated; and a tracking controller 33 that outputs, to the antenna drive controller 27, as the command value, a value obtained by adding the arrival direction error corrected based on the phase correction value γ to the orientation direction actual measurement value.

公开(公告)号：US11360202B2

公开(公告)日：2022-06-14

申请号：US16766670

申请日：2018-11-22

Applicant: Robert Bosch GmbH

Inventor： Marcel Mayer ,  Michael Schoor

IPC: G01S13/34 ,  G01S7/35 ,  H01Q25/02

Abstract: An FMCW radar sensor having a plurality of antenna elements at a distance from one another in a row, to each of which is assigned a mixer, which produces an intermediate frequency signal, and an evaluation unit that is designed to record the intermediate frequency signal over a measurement period as a function of time and to convert the time signal into a spectrum, and having an angular measuring device in which the spectra obtained from the evaluation devices are evaluated in separate channels. The sensor further including a beamforming device to carry out a beamforming for the signal received from a specified preferred direction by compensating run length differences of the signal to the antenna elements, a summation device forming a sum spectrum through coherent addition of the spectra, and a distance measuring device determining distances of objects in the preferred direction on the basis of the sum spectrum.

公开(公告)号：US10790584B2

公开(公告)日：2020-09-29

申请号：US15456200

申请日：2017-03-10

Applicant: Rohde & Schwarz GmbH & Co. KG

Inventor： Markus Neinhues

IPC: H01Q3/24 ,  G01S3/40 ,  G01S3/22 ,  H01Q1/48 ,  H01Q7/00 ,  H01Q15/14 ,  H01Q21/06 ,  H01Q25/02 ,  H01Q9/06 ,  H01Q9/28 ,  H01Q3/02 ,  H01Q3/40

Abstract: The present invention relates to a directional antenna module comprising: at least one antenna array having at least two antenna elements connected to a 180-degree hybrid providing an inphase summation signal and an out-of-phase summation signal of the antenna signals received from the antenna elements and a switching element adapted to switch between the inphase summation signal and the out-of-phase summation signal output by said 180-degree hybrid in response to a direction finding mode control signal (DFM-CRTL) to provide an antenna output signal at an antenna module output of said directional antenna module. The present invention further relates to a method for direction finding of a signal source.

公开(公告)号：US20200259271A1

公开(公告)日：2020-08-13

申请号：US16351835

申请日：2019-03-13

Applicant: Wistron Corp.

Inventor： Chih Peng LIN

IPC: H01Q25/02 ,  H01Q21/29 ,  H01Q21/00

Abstract: An antenna system includes a power divider, a first antenna array, a second antenna array, a third antenna array, a delay device, a first switch element, and a second switch element. The power divider has a first output port, a second output port, and a third output port. The first antenna array is coupled to the first output port. The second antenna array is coupled to the second output port. The third antenna array is coupled to the third output port. The first switch element determines whether to couple the first output port to the delay device according to a first control signal. The second switch element determines whether to couple the third output port to a ground voltage according to a second control signal.

公开(公告)号：US10656221B2

公开(公告)日：2020-05-19

申请号：US15875633

申请日：2018-01-19

Applicant: Shanghai Neusoft Medical Technology Co., Ltd.

Inventor： Qin Xu

IPC: G01R33/36 ,  H01Q3/38 ,  H01Q1/36 ,  H01Q7/00 ,  H01Q3/40 ,  H01Q5/35 ,  H01Q25/02 ,  H01Q5/307 ,  G01R33/34 ,  G01R33/565

Abstract: A drive circuit of a radio-frequency (RF) transmitting coil and a magnetic resonance imaging (MRI) device are provided. According to an example, the drive circuit includes a controller, a digital-to-analogue converter (DAC) coupled with the controller, a RF amplifier coupled with the DAC, a power divider coupled with the RF amplifier, and a plurality of phase shifters respectively coupled with at least three output ports of the power divider.

公开(公告)号：US10476154B2

公开(公告)日：2019-11-12

申请号：US15301585

申请日：2015-08-05

Applicant: Massachusetts Institute of Technology

Inventor： Jonathan Peter Doane ,  Glenn A. Brigham ,  Bradley T. Perry

IPC: H01Q3/26 ,  G01S3/06 ,  H01Q21/29 ,  H01Q25/02 ,  G01S13/02 ,  G01S7/28 ,  G01S13/34 ,  G01S13/76

Abstract: Described embodiments provide sidelobe cancellation for Simultaneous Transmit and Receive systems. The sidelobe cancellation system includes an array having a primary aperture and an auxiliary array. The auxiliary array includes a plurality of antenna elements disposed adjacent to at least one side of the primary aperture. Each element of the auxiliary array is coupled to a variable attenuator, a variable phase shifter or a variable true time delay unit. A controller tunes the auxiliary array to cancel sidelobes of the primary aperture by adaptively selecting an attenuation value of the variable attenuator, a phase shift value of the variable phase shifter and a time delay value of the variable true time delay unit for each element of the auxiliary array. The auxiliary array operates as an adaptive finite-impulse response (FIR) filter with each antenna element of the auxiliary array operating as an adaptive tap of the adaptive FIR filter.

公开(公告)号：US10419974B2

公开(公告)日：2019-09-17

申请号：US15313449

申请日：2016-02-15

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Joakim Axmon ,  Magnus Larsson ,  Oskar Mauritz

IPC: H04W28/16 ,  H01Q21/12 ,  H01Q25/02 ,  H04W72/04 ,  H04W56/00 ,  H04W74/00 ,  H04W74/08

Abstract: A network node is connected to a plurality of antenna nodes that are located along a constrained path where a plurality of wireless communication devices are located. The antenna nodes are controlled to maintain reception radio lobes substantially along the path such that the wireless communication devices can perform uplink radio communication with the network node via the reception radio lobes. At least one RF signal is detected in a PRACH, with a first PRACH configuration. A determination is made of a radio frequency offset of the detected RF signal. A determination is then made that the at least one RF signal originates from a wireless communication device of a specific subset among the plurality of wireless communication devices. Each wireless communication devices in the specific subset is associated with the radio frequency offset. A second PRACH configuration that is common to all wireless communication devices in the specific subset of wireless communication devices is then provided to the wireless communication device.

公开(公告)号：US20190146094A1

公开(公告)日：2019-05-16

申请号：US16165529

申请日：2018-10-19

Applicant: TRIMBLE INC.

Inventor： GREGORY WALLACE ,  SHAWN D. WEISENBURGER

IPC: G01S19/36 ,  H01Q9/04 ,  H01Q1/22 ,  H01Q21/06 ,  G01S19/32 ,  H01Q25/02

Abstract: A hardware front-end for a software-defined GNSS receiver, which includes an antenna connected to a transmission line that is connected to a pair of separate circuits, one for receiving L1 signals and one for receiving L2 signals. Each circuit includes at least one bandpass filter, at least one LNA, and a single-chip GNSS receiver that receives analog RF signals and provides digitized I and Q signals. The pair of circuits differ in that a first one is designed to receive, filter, and amplify RF signals at the L1 frequency corresponding to the designed input frequency of the receiver and the second one is designed to receive, filter, and amplify RF signals at the L2 frequency, which is significantly different from the first frequency. The second circuit also includes a mixer to convert the L2 frequency to the L1 frequency, so that a similar receiver can be used in each circuit.

公开(公告)号：US20190109386A1

公开(公告)日：2019-04-11

申请号：US16157937

申请日：2018-10-11

Applicant: wiSpry, Inc.

Inventor： Igor Syrytsin ,  Shuai Zhang ,  Gert Frølund Pedersen

IPC: H01Q21/06 ,  H01Q25/02 ,  H01Q25/04 ,  H01Q5/357

Abstract: Wideband phased mobile antenna array devices, systems, and methods include antenna elements arranged in a substantially linear array and positioned and adjusted on a substrate to achieve an aggregate radiation pattern in an end-fire direction. In some embodiments, each antenna element includes two pairs of antenna arms, a pair on either side of the substrate. In some embodiments, each pair of antenna arms are configured to be adjusted and positioned symmetrically to generate the end-fire radiation pattern. In some embodiments, each of the antenna elements in the linear array is spaced apart from each other by a distance that is equal to approximately λ/2, where λ is a wavelength associated with a frequency within a desired operating frequency range of the antenna system.

公开(公告)号：US10056675B1

公开(公告)日：2018-08-21

申请号：US15674351

申请日：2017-08-10

Applicant: The Aerospace Corporation

Inventor： Robert B. Dybdal

IPC: H01Q1/12 ,  H01Q25/02 ,  H01Q3/02 ,  H04B1/10

CPC classification number: H01Q1/1257 ,  H01Q3/02 ,  H01Q25/02 ,  H04B1/1036

Abstract: Systems and methods are provided for repositioning a directional antenna that responds to a desired signal and directional interference. The antenna can generate a sum beam and first and second difference beams. Respective powers of the sum beam and the first and second difference beams can be determined. At least a portion of any of the directional interference can be excised from the sum beam and the first and second difference beams. Measures of the directional interference can be determined in the sum beam and the first and second difference beams. A first correlation between the sum beam and the first and second difference beams can be generated. Additional correlations between a signal identifier and the sum beam and first and second beams monitor the desired signal reception. The antenna can be repositioned away from the directional interference based on the powers, the measures, and the first correlation.