-
公开(公告)号：US11543489B2
公开(公告)日：2023-01-03
申请号：US16867804
申请日：2020-05-06
Applicant: Keysight Technologies, Inc.
Inventor： Gregory S. Lee
IPC: G01S7/40 , G01S13/931
Abstract: A system for testing vehicular radar is described. The system include a diffractive optical element (DOE) configured to diffract electromagnetic waves incident on a first side from a radar device under test (DUT). The system also includes a re-illumination element adapted to receive the electromagnetic waves diffracted from the DOE from a second side. The re-illumination element being adapted to transmit apparent angle of arrival (AoA) electromagnetic waves back to the DOE.
-
公开(公告)号：US20220179044A1
公开(公告)日：2022-06-09
申请号：US17349678
申请日：2021-06-16
Applicant: Keysight Technologies, Inc.
Inventor： Dietrich W. Vook , Todd Steven Marshall , Jefferson B. Burch , Gregory S. Lee
IPC: G01S7/40
Abstract: An apparatus is for generating an emulated radar reflection signal of a target moving at a relative velocity. The apparatus includes a radar detector, an emulation transmitter, and a processor. The radar detector is configured to detect radar chirps emitted by a device under test (DUT), where the chirps are emitted at random time intervals. The emulation transmitter is configured to generate emulated radar reflection signals of the target being emulated. The processor is configured to generate control signals at intervals corresponding to the random time intervals at which the radar chirps are emitted by the DUT, where each control signal controls the emulation transmitter to generate a radar reflection signal. A relative phase of the control signals is adjusted according to a duration of each of the random time intervals between successive chirps and a magnitude and sign of the relative velocity of the target.
-
13.发明申请公开(公告)号：US20220018934A1
公开(公告)日：2022-01-20
申请号：US17157160
申请日：2021-01-25
Applicant: Keysight Technologies, Inc.
Inventor： Gregory S. Lee , Gregory Douglas Vanwiggeren , Ken A. Nishimura
IPC: G01S7/40
Abstract: A system for testing vehicular radar is disclosed. The system includes a re-illumination element adapted to receive electromagnetic waves, and to transmit response signals. The re-illumination element includes: a plurality of miniature radar target simulators (MRTS's), each comprising: a receive antenna; a variable gain amplifier (VGA); an in-phase-quadrature (IQ) mixer; a variable attenuator; and a transmit antenna. The MRTS's are disposed in an array comprising rows and columns of the MRTS's, and each MRTS of the array is laterally spaced a distance px and vertically spaced a distance py from an adjacent MRTS. An incremental subtended azimuth angle (δϕ) and an incremental subtended elevation (δθ) angle are finer than an azimuth resolution specification (ϕres) and an elevation resolution specification (θres) of a radar device under test (DUT).
-
公开(公告)号：US20210265742A1
公开(公告)日：2021-08-26
申请号：US17255479
申请日：2018-09-05
Applicant: Keysight Technologies, Inc.
Inventor： Gregory S. Lee , Dieter W. Vook
Abstract: A system tests a device under test (DUT) that includes an antenna. The system includes a probe antenna, a network emulator, and a near-field antenna. The probe antenna measures beam characteristics of a beam-locked beam emitted over the air by the antenna of the DUT as the DUT is moved relative to the probe antenna during testing of the DUT. The network emulator emulates a base station of a communications network in communications with the DUT. The near-field antenna maintains a call link between the network emulator and the DUT using surface waves between the near-field antenna and the DUT as the DUT is moved relative to the probe antenna.
-
公开(公告)号：US20210055411A1
公开(公告)日：2021-02-25
申请号：US16778648
申请日：2020-01-31
Applicant: Keysight Technologies, Inc.
Inventor： Gregory S. Lee , Paul L. Corredoura
Abstract: A device for detecting and selectively reflecting an incident microwave signal or millimeter-wave signal is disclosed. The device includes a plurality of antennae disposed in an array; and a diode disposed at each input of each antenna, each diode having an input adapted to selectively receive a reverse bias signal, or a zero bias signal, or a forward bias signal. The device also includes a switching device connected to each input, and configured to selectively apply the forward bias signal, or the reverse bias signal or the zero bias signal to each of the diodes. In forward bias, each of the plurality of antennae reflects the incident microwave signal or millimeter wave signal; and in zero bias or reverse bias each of the plurality of antennae detects the incident microwave signal or millimeter wave signal.
-
Patent Agency Ranking
公开(公告)号：US20210055383A1
公开(公告)日：2021-02-25
申请号：US16995913
申请日：2020-08-18
Applicant: Keysight Technologies, Inc.
Inventor： Gregory S. Lee
Abstract: A method of testing vehicular radar includes acquiring binary phase codes of transmitters in a radar DUT; acquiring desired FOVs and desired angular resolutions of the transmitters to determine target angles of emulated targets; calculating far field phases of a PMCW signal for binary phase states of the transmit array at each of the target angles to determine resultant phase symbol streams; calculating excess roundtrip time delay for each emulation delay, between the DUT and the emulated targets, and each setup delay between the DUT and each emulator receiver; time-shifting the resultant phase symbol streams by the excess roundtrip time delays; subtracting the time-shifted resultant phase symbol streams from the resultant phase symbol streams to obtain difference phase symbol streams; modulating a PMCW signal transmitted by the DUT by the difference phase symbol streams; and emulating the echo signals at the target angles in response to the modulated PMCW signal.
-
公开(公告)号：US10001694B1
公开(公告)日：2018-06-19
申请号：US14541014
申请日：2014-11-13
Applicant: Keysight Technologies, Inc.
Inventor： Gregory S. Lee , Christopher Coleman , Dietrich W. Vook , Thomas S. Low
CPC classification number: G02F1/2255 , G02F2001/212 , G02F2201/12
Abstract: An optical modulator that is adapted to modulate a light signal at very high RF frequencies and provide the modulating RF signal to equipment separate from the modulator is disclosed. The modulator includes a Mach-Zehnder Modulator in which light loses due to the crossing of the RF waveguide conductors and the optical waveguides are reduced. In addition, problems arising from asynchrony between the RF signals and the optical signals are reduced. The modulator also reduces signal losses due to resonances in the modulator. The modulator can be configured to be used in test probes that require a compact configuration that is adapted to designs having multiple test probes that are proximate to each other.
-
公开(公告)号：US20240353698A1
公开(公告)日：2024-10-24
申请号：US18438647
申请日：2024-02-12
Applicant: Keysight Technologies, Inc.
Inventor： Gregory S. Lee
IPC: G02F1/035
CPC classification number: G02F1/035 , G02F2202/32
Abstract: An electrooptic (EO) phase modulator is described. The EO phase modulator includes: a first photonic bandgap (PBG) metamaterial region suppressing propagation of light having a wavelength of interest; a second PBG metamaterial region suppressing propagation of light having the same wavelength of interest; an EO region disposed between the first and second PBG metamaterial regions and adapted to guide light having the wavelength of interest; a first electrode contacting the first PBG metamaterial region; and a second electrode contacting the second PBG metamaterial region. A magnitude of an electric field across the first and second PBG metamaterial regions is small compared to a magnitude of the electric field across the EO region. An EO intensity modulator including two EO phase modulators is also described.
-
公开(公告)号：US11994617B2
公开(公告)日：2024-05-28
申请号：US17349678
申请日：2021-06-16
Applicant: Keysight Technologies, Inc.
Inventor： Dietrich W. Vook , Todd Steven Marshall , Jefferson B. Burch , Gregory S. Lee
CPC classification number: G01S7/4056 , G01S7/40 , G01S7/4069
Abstract: An apparatus is for generating an emulated radar reflection signal of a target moving at a relative velocity. The apparatus includes a radar detector, an emulation transmitter, and a processor. The radar detector is configured to detect radar chirps emitted by a device under test (DUT), where the chirps are emitted at random time intervals. The emulation transmitter is configured to generate emulated radar reflection signals of the target being emulated. The processor is configured to generate control signals at intervals corresponding to the random time intervals at which the radar chirps are emitted by the DUT, where each control signal controls the emulation transmitter to generate a radar reflection signal. A relative phase of the control signals is adjusted according to a duration of each of the random time intervals between successive chirps and a magnitude and sign of the relative velocity of the target.
-
公开(公告)号：US11686813B2
公开(公告)日：2023-06-27
申请号：US17097093
申请日：2020-11-13
Applicant: Keysight Technologies, Inc.
Inventor： Gregory S. Lee
IPC: G01S7/40 , G01S13/931
CPC classification number: G01S7/4008 , G01S7/4021 , G01S13/931
Abstract: A system for testing vehicular radar is described. The system include a free-space polarization adapter (FSPA) configured to alter a first polarization state of electromagnetic waves from a radar device under test (DUT) to a second polarization state, which is different than the first polarization state; and a re-illuminator adapted to receive the electromagnetic waves having the second polarization state from the FSPA.
-
-
-
-
-
-
-
-
-
Search Results
41
records
(took 0.01 seconds)
