Patents by Inventor Vladimir Rojanski
Vladimir Rojanski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11575200Abstract: An antenna device is presented comprising: a conformal antenna body which has a desired geometry corresponding to a front portion of a platform on which the antenna device is to be mounted, and an antenna unit carried by the antenna body. The antenna unit comprises at least one phased array of antenna elements, the antenna elements of each of the at least one array being arranged in a spaced-apart relationship in a closed loop path along a circumference of the antenna body having a desired geometry corresponding to the front portion of the platform on which the antenna unit is to be mounted. Each of the antenna elements is configured as an end-fire antenna element capable of emitting linearly polarized radiation. The array of the antenna elements is operable as a forward looking end-fire antenna array, enabling electronic steering of an antenna beam by controllably modifying phases of the antenna elements of each array.Type: GrantFiled: August 1, 2018Date of Patent: February 7, 2023Assignee: ISRAEL AEROSPACE INDUSTRIES LTD.Inventor: Vladimir Rojanski
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Patent number: 11329398Abstract: An antenna device is presented. The antenna device comprises: a conformal antenna body which has a desired geometry corresponding to a front portion of a platform on which the antenna device is to be mounted, and an antenna unit carried by the antenna body. The antenna unit comprises at least one phased array of antenna elements. The antenna elements of each array are arranged in a spaced-apart relationship in a closed loop path along a circumference of the antenna body having a desired geometry corresponding to a front portion of platform on which the antenna unit is to be mounted. Each of the antenna elements is configured as an end-fire antenna element capable of emitting linearly polarized radiation, the array of the antenna elements being thereby operable as a forward looking end-fire antenna array, enabling electronic steering of an antenna beam by controllably modifying phases of the antenna elements of each array.Type: GrantFiled: June 13, 2018Date of Patent: May 10, 2022Assignee: ISRAEL AEROSPACE INDUSTRIES LTD.Inventor: Vladimir Rojanski
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Patent number: 11276944Abstract: A system and method for determination of a direction to an object emitting and/or reflecting electromagnetic radiation. The system includes a first pair of linearly polarized antennas configured for receiving a polarized signal of a first polarization type and a second pair of linearly polarized antennas configured for receiving another polarized signal of the polarization second type originated from the object. The system includes four receivers coupled to the linearly polarized antennas of the first and second pairs and a signal processing system coupled to the receivers. Each receiver associated with at least one pair of the antennas, includes a phase shifter to provide a required phase shift to the received polarized signals. The signal processing system combines the phase-shifted polarized signals with non-shifted signals which are originated from different pairs of the antennas, and to process these signals for generating at least one direction parameter of the object.Type: GrantFiled: January 16, 2019Date of Patent: March 15, 2022Assignee: ISRAEL AEROSPACE INDUSTRIES LTD.Inventors: Vladimir Rojanski, Liran Wiener
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Publication number: 20210313686Abstract: An antenna device is presented comprising: a conformal antenna body which has a desired geometry corresponding to a front portion of a platform on which the antenna device is to be mounted, and an antenna unit carried by the antenna body. The antenna unit comprises at least one phased array of antenna elements, the antenna elements of each of the at least one array being arranged in a spaced-apart relationship in a closed loop path along a circumference of the antenna body having a desired geometry corresponding to the front portion of the platform on which the antenna unit is to be mounted. Each of the antenna elements is configured as an end-fire antenna element capable of emitting linearly polarized radiation. The array of the antenna elements is operable as a forward looking end-fire antenna array, enabling electronic steering of an antenna beam by controllably modifying phases of the antenna elements of each array.Type: ApplicationFiled: August 1, 2018Publication date: October 7, 2021Inventor: Vladimir Rojanski
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Publication number: 20200373681Abstract: A system and method for determination of a direction to an object emitting and/or reflecting electromagnetic radiation. The system includes a first pair of linearly polarized antennas configured for receiving a polarized signal of a first polarization type and a second pair of linearly polarized antennas configured for receiving another polarized signal of the polarization second type originated from the object. The system includes four receivers coupled to the linearly polarized antennas of the first and second pairs and a signal processing system coupled to the receivers. Each receiver associated with at least one pair of the antennas, includes a phase shifter to provide a required phase shift to the received polarized signals. The signal processing system combines the phase-shifted polarized signals with non-shifted signals which are originated from different pairs of the antennas, and to process these signals for generating at least one direction parameter of the object.Type: ApplicationFiled: January 16, 2019Publication date: November 26, 2020Inventors: Vladimir Rojanski, Liran Wiener
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Patent number: 10761184Abstract: 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.Type: GrantFiled: February 7, 2017Date of Patent: September 1, 2020Assignee: ISRAEL AEROSPACE INDUSTRIES LTD.Inventors: Igal Greenberg, Orna Boeko, Vladimir Rojanski
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Publication number: 20200176889Abstract: An antenna device is presented. The antenna device comprises: a conformal antenna body which has a desired geometry corresponding to a front portion of a platform on which the antenna device is to be mounted, and an antenna unit carried by the antenna body. The antenna unit comprises at least one phased array of antenna elements. The antenna elements of each array are arranged in a spaced-apart relationship in a closed loop path along a circumference of the antenna body having a desired geometry corresponding to a front portion of platform on which the antenna unit is to be mounted. Each of the antenna elements is configured as an end-fire antenna element capable of emitting linearly polarized radiation, the array of the antenna elements being thereby operable as a forward looking end-fire antenna array, enabling electronic steering of an antenna beam by controllably modifying phases of the antenna elements of each array.Type: ApplicationFiled: June 13, 2018Publication date: June 4, 2020Inventor: Vladimir Rojanski
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Patent number: 10355349Abstract: A dual mode electromagnetic detection system and a protective dome for the electromagnetic detection system are described. The protective dome includes a substrate having a portion transparent to both infrared radiation and radio frequency radiation. The portion of the substrate includes a macromolecular material including a polymer selected from a family of polyolefins and an antistatic additive.Type: GrantFiled: June 14, 2015Date of Patent: July 16, 2019Assignee: ISRAEL AEROSPACE INDUSTRIES LTD.Inventors: Vladimir Rojanski, Daniel Sudit
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Publication number: 20190041493Abstract: 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.Type: ApplicationFiled: February 7, 2017Publication date: February 7, 2019Inventors: Igal GREENBERG, Orna BOEKO, Vladimir ROJANSKI
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Patent number: 9929472Abstract: An antenna element having a vertically stacked structure and a phased array antenna that includes a plurality of antenna elements sharing a common conductive ground plane are described. The phased array antenna also includes a common conductive shell electrically coupled to the common conductive ground plane and extending away there from to encompass the antenna elements. The common conductive shell and the common conductive ground plane together define a common cavity having a common aperture. The phased array antenna also includes a common dielectric superstrate layer disposed over the common cavity at a predetermined distance from the antenna elements and a beam steering system coupled to the antenna elements and configured for steering an energy beam produced by the phased array antenna.Type: GrantFiled: March 6, 2013Date of Patent: March 27, 2018Assignee: ISRAEL AEROSPACE INDUSTRIES LTD.Inventors: Vladimir Rojanski, Aharon Starovolski
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Publication number: 20170170554Abstract: A dual mode electromagnetic detection system and a protective dome for the electromagnetic detection system are described. The protective dome includes a substrate having a portion transparent to both infrared radiation and radio frequency radiation. The portion of the substrate includes a macromolecular material including a polymer selected from a family of polyolefins and an antistatic additive.Type: ApplicationFiled: June 14, 2015Publication date: June 15, 2017Inventors: Vladimir Rojanski, Daniel Sudit
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Publication number: 20150084814Abstract: An antenna element having a vertically stacked structure and a phased array antenna that includes a plurality of antenna elements sharing a common conductive ground plane are described. The phased array antenna also includes a common conductive shell electrically coupled to the common conductive ground plane and extending away there from to encompass the antenna elements. The common conductive shell and the common conductive ground plane together define a common cavity having a common aperture. The phased array antenna also includes a common dielectric superstrate layer disposed over the common cavity at a predetermined distance from the antenna elements and a beam steering system coupled to the antenna elements and configured for steering an energy beam produced by the phased array antenna.Type: ApplicationFiled: March 6, 2013Publication date: March 26, 2015Inventors: Vladimir Rojanski, Aharon Starovolski
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Patent number: 6791497Abstract: A slot spiral miniaturized antenna is described. The antenna includes a conductive layer formed on a first side of a dielectric substrate. A slot arranged in the form of a spiral curve and having a slow-wave structure is formed in the conductive layer. The antenna also includes a planar balun formed on a second side of the substrate. The balun is in the form of a conductive layer strip positioned beneath a section on the conductive layer defined by an area between two neighboring parts of the slotline. The conductive layer strip has a shape that replicates a pattern of the two neighboring parts of the slotline. The conductive layer strip provides a balanced feed to the slot at a feedpoint that is defined by a place wherein a projection of said conductive layer strip on the second side intercepts the slotline. Electromagnetic coupling between the conductive layer strip and the slotline without electrical contact causes the exciting of the slotline.Type: GrantFiled: September 25, 2001Date of Patent: September 14, 2004Assignee: Israel Aircraft Industries Ltd.Inventors: Mark Winebrand, Vladimir Rojanski
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Publication number: 20020122009Abstract: A slot spiral miniaturized antenna is described. The antenna includes a conductive layer formed on a first side of a dielectric substrate. A slot arranged in the form of a spiral curve and having a slow-wave structure is formed in the conductive layer. The antenna also includes a planar balun formed on a second side of the substrate. The balun is in the form of a conductive layer strip positioned beneath a section on the conductive layer defined by an area between two neighboring parts of the slotline. The conductive layer strip has a shape that replicates a pattern of the two neighboring parts of the slotline. The conductive layer strip provides a balanced feed to the slot at a feedpoint that is defined by a place wherein a projection of said conductive layer strip on the second side intercepts the slotline. Electromagnetic coupling between the conductive layer strip and the slotline without electrical contact causes the exciting of the slotline.Type: ApplicationFiled: September 25, 2001Publication date: September 5, 2002Inventors: Mark Winebrand, Vladimir Rojanski