Patents by Inventor David Michael Wither
David Michael Wither 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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Publication number: 20220271416Abstract: The invention relates to antenna apparatus comprising: an antenna, a signal conductor and one or more RF MEMS switches, the antenna being conductively connected to the signal conductor, the MEMS switches and at least a portion of the signal conductor being supported by a crystalline MEMS substrate; and a capping substrate comprising a capping portion, wherein an enclosed volume is formed around the said MEMS switches between the capping portion and at least a portion of the crystalline MEMS substrate, and wherein the capping substrate comprises the said antenna.Type: ApplicationFiled: May 13, 2022Publication date: August 25, 2022Inventors: Nakul Raghavanand HARIDAS, David Michael WITHER, Victor STEEL, Wei ZHOU, Tonio IDDA, Admed Osman EL-RAYIS
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Patent number: 11362411Abstract: The invention relates to antenna apparatus comprising: an antenna, a signal conductor and one or more RF MEMS switches, the antenna being conductively connected to the signal conductor, the MEMS switches and at least a portion of the signal conductor being supported by a crystalline MEMS substrate; and a capping substrate comprising a capping portion, wherein an enclosed volume is formed around the said MEMS switches between the capping portion and at least a portion of the crystalline MEMS substrate, and wherein the capping substrate comprises the said antenna.Type: GrantFiled: December 20, 2017Date of Patent: June 14, 2022Assignee: SOFANT TECHNOLOGIES LTD.Inventors: Nakul Raghavanand Haridas, David Michael Wither, Victor Steel, Wei Zhou, Tonio Idda, Admed Osman El-Rayis
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Patent number: 10862196Abstract: The invention provides an antenna array comprising: a plurality of antenna modules, each of the antenna modules comprising an antenna, a signal conductor and one or more microelectromechanical (MEMS) switches, the antenna being conductively connected to the signal conductor, the MEMS switches and at least a portion of the signal conductor being supported by a MEMS substrate; and one or more integrated circuits comprising MEMS control circuitry configured to control the said one or more MEMS switches and/or signal processing circuitry configured to process signals received and/or to be transmitted by the antennas of the antenna modules, wherein the antenna modules and integrated circuits are supported by a common carrier substrate comprising the antennas of the antenna modules, the MEMS switches; or the said one or more integrated circuits. A hierarchy of MEMS controllers includes a master MEMS controller and local MEMS controllers which send control signals to a plurality of MEMS switches.Type: GrantFiled: December 21, 2017Date of Patent: December 8, 2020Assignee: SOFANT TECHNOLOGIES LTD.Inventors: Nakul Raghavanand Haridas, David Michael Wither, Victor Steel, Wei Zhou, Tonio Idda, Admed Osman El-Rayis
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Publication number: 20190372199Abstract: The invention relates to antenna apparatus comprising: an antenna, a signal conductor and one or more RF MEMS switches, the antenna being conductively connected to the signal conductor, the MEMS switches and at least a portion of the signal conductor being supported by a crystalline MEMS substrate; and a capping substrate comprising a capping portion, wherein an enclosed volume is formed around the said MEMS switches between the capping portion and at least a portion of the crystalline MEMS substrate, and wherein the capping substrate comprises the said antenna.Type: ApplicationFiled: December 20, 2017Publication date: December 5, 2019Inventors: Nakul Raghavanand HARIDAS, David Michael WITHER, Victor STEEL, Wei ZHOU, Tonio IDDA, Admed Osman EL-RAYIS
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Publication number: 20190334228Abstract: The invention provides an antenna array comprising: a plurality of antenna modules, each of the antenna modules comprising an antenna, a signal conductor and one or more microelectromechanical (MEMS) switches, the antenna being conductively connected to the signal conductor, the MEMS switches and at least a portion of the signal conductor being supported by a MEMS substrate; and one or more integrated circuits comprising MEMS control circuitry configured to control the said one or more MEMS switches and/or signal processing circuitry configured to process signals received and/or to be transmitted by the antennas of the antenna modules, wherein the antenna modules and integrated circuits are supported by a common carrier substrate comprising the antennas of the antenna modules, the MEMS switches; or the said one or more integrated circuits. A hierarchy of MEMS controllers includes a master MEMS controller and local MEMS controllers which send control signals to a plurality of MEMS switches.Type: ApplicationFiled: December 21, 2017Publication date: October 31, 2019Inventors: Nakul Raghavanand HARIDAS, David Michael WITHER, Victor STEEL, Wei ZHOU, Tonio IDDA, Admed Osman EL-RAYIS
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Patent number: 8736513Abstract: A backfire dielectrically loaded antenna for operation at a frequency in excess of 200 MHz includes a dielectric core having a relative dielectric constant greater than 5 and having an outer surface defining an interior volume the major part of which is occupied by solid material of the core; a three-dimensional antenna element structure including at least one pair of elongate conductive antenna elements disposed on or adjacent the side surface portion of the core and extending from a distal core surface portion towards a proximal core surface portion; a feed structure having an axially extending elongate laminate board including a transmission line section acting as a feed line which extends through a passage in the core from the distal core surface portion to the proximal core surface portion, and an antenna connection section having an integrally formed proximal extension of the transmission line section the width of which, in the plane of the laminate board, is greater than the width of the passage; and aType: GrantFiled: January 27, 2011Date of Patent: May 27, 2014Assignee: Sarantel LimitedInventors: Andrew Robert Christie, David Michael Wither, Sinikka Lyyra
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Patent number: 8599101Abstract: A radio communication apparatus including: (a) a backfire dielectrically loaded antenna for operation at a frequency in excess of 200 MHz comprising: an electrically insulative dielectric core of a solid material having a relative dielectric constant greater than 5 and having an outer surface including oppositely directed distal and proximal surface portions extending transversely of an axis of the antenna and a side surface portion extending between the transversely extending surface portions, the core outer surface defining an interior volume the major part of which is occupied by the solid material of the core; a three-dimensional antenna element structure including at least one pair of elongate conductive antenna elements disposed on or adjacent the side surface portion of the core and extending from the distal core surface portion towards the proximal core surface portion; a feed structure in the form of an axially extending elongate laminate board comprising at least a transmission line section acting aType: GrantFiled: January 27, 2011Date of Patent: December 3, 2013Assignee: Sarantel LimitedInventors: Andrew Robert Christie, David Michael Wither, Martyn Leslie Tongue, Frank Kwasi Frimpong
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Patent number: 8279135Abstract: A dielectrically loaded backfire helical antenna has a cylindrical ceramic core and a feed structure which passes axially through the core to a distal end face of the core where it is connected to helical conductors located on the outside of the core. Opening out on the proximal end face of the core is a cavity which is coaxial with the feed structure. A conductive balun layer encircling a portion of the core extends over the proximal end face of the core and the wall of the cavity to connect the helical elements to the feeder structure when it emerges into the cavity. The presence of the cavity and accommodating some of the length of the balun in the cavity allows a reduction in the size and weight of a dielectrically loaded backfire antenna.Type: GrantFiled: September 9, 2009Date of Patent: October 2, 2012Assignee: Sarantel LimitedInventors: David Michael Wither, Oliver Paul Leisten
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Patent number: 8279134Abstract: A dielectrically loaded backfire helical antenna has a cylindrical ceramic core and a feed structure which passes axially through the core to a distal end face of the core where it is connected to helical conductors located on the outside of the core. Opening out on the proximal end face of the core is a cavity which is coaxial with the feed structure. A conductive balun layer encircling a portion of the core extends over the proximal end face of the core and the wall of the cavity to connect the helical elements to the feeder structure when it emerges into the cavity. The presence of the cavity and accommodating some of the length of the balun in the cavity allows a reduction in the size and weight of a dielectrically loaded backfire antenna.Type: GrantFiled: February 17, 2005Date of Patent: October 2, 2012Assignee: Sarantel LimitedInventors: David Michael Wither, Oliver Paul Leisten
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Publication number: 20110221651Abstract: A radio communication apparatus including: (a) a backfire dielectrically loaded antenna for operation at a frequency in excess of 200 MHz comprising: an electrically insulative dielectric core of a solid material having a relative dielectric constant greater than 5 and having an outer surface including oppositely directed distal and proximal surface portions extending transversely of an axis of the antenna and a side surface portion extending between the transversely extending surface portions, the core outer surface defining an interior volume the major part of which is occupied by the solid material of the core; a three-dimensional antenna element structure including at least one pair of elongate conductive antenna elements disposed on or adjacent the side surface portion of the core and extending from the distal core surface portion towards the proximal core surface portion; a feed structure in the form of an axially extending elongate laminate board comprising at least a transmission line section acting aType: ApplicationFiled: January 27, 2011Publication date: September 15, 2011Inventors: Andrew Robert Christie, David Michael Wither, Martyn Leslie Tongue, Frank Kwasi Frimpong
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Publication number: 20110221650Abstract: A backfire dielectrically loaded antenna for operation at a frequency in excess of 200 MHz includes a dielectric core having a relative dielectric constant greater than 5 and having an outer surface defining an interior volume the major part of which is occupied by solid material of the core; a three-dimensional antenna element structure including at least one pair of elongate conductive antenna elements disposed on or adjacent the side surface portion of the core and extending from a distal core surface portion towards a proximal core surface portion; a feed structure having an axially extending elongate laminate board including a transmission line section acting as a feed line which extends through a passage in the core from the distal core surface portion to the proximal core surface portion, and an antenna connection section having an integrally formed proximal extension of the transmission line section the width of which, in the plane of the laminate board, is greater than the width of the passage; and aType: ApplicationFiled: January 27, 2011Publication date: September 15, 2011Inventors: Andrew Robert Christie, David Michael Wither, Sinikka Lyyra
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Publication number: 20100001920Abstract: A dielectrically loaded backfire helical antenna has a cylindrical ceramic core and a feed structure which passes axially through the core to a distal end face of the core where it is connected to helical conductors located on the outside of the core. Opening out on the proximal end face of the core is a cavity which is coaxial with the feed structure. A conductive balun layer encircling a portion of the core extends over the proximal end face of the core and the wall of the cavity to connect the helical elements to the feeder structure when it emerges into the cavity. The presence of the cavity and accommodating some of the length of the balun in the cavity allows a reduction in the size and weight of a dielectrically loaded backfire antenna.Type: ApplicationFiled: September 9, 2009Publication date: January 7, 2010Inventors: David Michael Wither, Oliver Paul Leisten
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Patent number: 7256752Abstract: A unitary feed structure for sliding installation in a passage in the insulative core of a dielectrically-loaded antenna comprises the unitary combination of a tubular outer shield conductor and elongate inner conductor which extends through the shield conductor and is insulated from the latter. The shield conductor and inner conductor have oppositely directed radially extending connection members at an end of the feed structure, these connection members being integrally formed as part of the respective conductors so that the feed structure can be inserted as a unit into the passage in the antenna core so that the connection members engage respective connection portions formed on an end face of the core adjacent on end of the passage. Soldering of the connection members to the connection portions can be performed as a single operation so as to connect the feed structure to conductive antenna elements plated on the outer surface of the core.Type: GrantFiled: November 12, 2004Date of Patent: August 14, 2007Assignee: Sarantel LimitedInventors: David Michael Wither, Oliver Paul Leisten