公开(公告)号：US09921296B2

公开(公告)日：2018-03-20

申请号：US14762228

申请日：2013-11-11

Applicant: ISRAEL AEROSPACE INDUSTRIES LTD.

Inventor： Igal Greenberg ,  Raphael Levy

IPC: G01S7/40 ,  G01S13/28 ,  G01S13/34

CPC classification number: G01S7/4008 ,  G01S13/282 ,  G01S13/34 ,  G01S2007/4065

Abstract: A method of testing a frequency synthesizer over a predetermined frequency range using a delay unit complying with a spectral delay distribution model modeling a spectral delay distribution of the delay unit over the predetermined frequency range. The method comprises generating at least one test signal with the frequency synthesizer according to at least one test command; passing the at least one test signal through the delay unit so as to obtain at least one delayed test signal; measuring at least one shift of a signal attribute between the delayed test signal and the test signal; estimating an accuracy of the frequency synthesizer by comparing the at least one measured shift with an expected shift, the expected shift being derived from the spectral delay distribution model of the delay unit and from the at least one test command.

公开(公告)号：US10761184B2

公开(公告)日：2020-09-01

申请号：US16077608

申请日：2017-02-07

Applicant: ISRAEL AEROSPACE INDUSTRIES LTD.

Inventor： Igal Greenberg ,  Orna Boeko ,  Vladimir Rojanski

IPC: G01S7/02 ,  G01S13/44 ,  G01S7/41 ,  G01S13/02

Abstract: A polarimetric phase array radar system (PPARS) for determination of parameters of a target and a method of operating the PPARS are described. The PPARS includes an array having transceiver elements configured to transmit transmitting signal components of a dual-polarization signal having either a single type polarization or simultaneously two types of polarization. The array also configured to receive a receiving signal component having a single type of polarization. In transmitting mode, the transceiver elements are operative to transmit a signal component having one or two types of polarization. In receiving mode, the transceiver elements are divided into at least two sub-arrays. Each sub-array includes a first portion of the transceiver elements and a second portion of the transceiver elements, and is operative to receive a signal component having a first type polarization by the first portion of the transceiver elements and a signal component having a second type polarization by the second portion of the transceiver elements.

公开(公告)号：US09869756B2

公开(公告)日：2018-01-16

申请号：US14898446

申请日：2014-06-19

Applicant: ISRAEL AEROSPACE INDUSTRIES LTD.

Inventor： Benjamin Levy ,  Valery Heymann ,  Igal Greenberg ,  Uri Karazi ,  Amnon Ychye

IPC: G01C21/02 ,  G01S7/491 ,  F41G3/14 ,  F41G7/22 ,  G01S3/784 ,  G01S7/493

CPC classification number: G01S7/4913 ,  F41G3/145 ,  F41G7/226 ,  F41G7/2293 ,  G01S3/784 ,  G01S7/493

Abstract: The presently disclosed subject matter includes a laser system and a respective method of detecting a signal reflected from a target illuminated by a modulated CW light source configured to generate a modulated laser signal at a predefined modulation frequency. A signal comprising true laser signal portions reflected from said target, and noise is received; the signal is filtered for selecting laser signal portions at a modulation frequency band; and the true signal portions in the signal are detected, if the energy at the modulation frequency band is greater than a given threshold.