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John E Kvarnstrand

from Columbia, MD
Age ~54
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Also known as:
John Ebert Kvarnstrand, John D
Related to:
Rocio CruzMaria G CruzRobert NowikChris NowikJennifer Cruz, 51Louise Everett
Connected to:
Maegan B Kvarnstrom, 36Jennifer M Kvartek, 43Regina M Kvartek, 62Ida Kvartovskaya, 85Chelsie P Kvasager, 32Corinne J Kvasager, 62Daniel Kvasager, 34Stacie M Kvasager, 57Alexei V Kvaschuk, 47Vladimira V Kvasna, 73

John Kvarnstrand Phones & Addresses

  • Columbia, MD
  • Chicago, IL
  • Ellicott City, MD
  • 5391 White Mane, Columbia, MD 21045

Work

Company: Bluetest ab Aug 2012 Address: Gothenburg, Sweden Position: R&d engineer

Education

Degree: MSc School / High School: The Faculty of Engineering at Lund University 1992 to 1997 Specialities: Engineering Physics (Civilingenjör Teknisk Fysik)

Industries

Wireless

Resumes

Resumes

John Kvarnstrand Photo 1

Antenna Engineer

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Position:
R&D Engineer at Bluetest AB
Location:
Gothenburg, Sweden
Industry:
Wireless
Work:
Bluetest AB - Gothenburg, Sweden since Aug 2012
R&D Engineer
Orbital Sciences Corporation Sep 2004 - Jul 2012
Sr Principal Engineer
Paratek Microwave Nov 2000 - Sep 2004
Sr RF Engineer
TimeSpace Radio Jan 1997 - Oct 2000
Antenna Engineer
Education:
The Faculty of Engineering at Lund University 1992 - 1997
MSc, Engineering Physics (Civilingenjör Teknisk Fysik)

Publications

Us Patents

Tunable Filters Having Variable Bandwidth And Variable Delay

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US Patent:
7034636, Apr 25, 2006
Filed:
Aug 5, 2004
Appl. No.:
10/912284
Inventors:
Khosro Shamsaifar - Ellicott City MD, US
Yongfei Zhu - Ellicott City MD, US
John Kvarnstrand - Columbia MD, US
Louise Sengupta - Ellicott City MD, US
Assignee:
Paratek Microwave Incorporated - Columbia MD
International Classification:
H03H 7/12
H03H 7/20
US Classification:
333174, 333175, 333178
Abstract:
An apparatus for reducing influence by selected signal components in a communication link includes a first signal line conveying a first communication signal including a desired signal component and at least one undesired signal component; a second signal line conveying a second communication signal substantially including at least the at least one undesired signal component; a signal treating unit coupled with the second signal line for affecting at least one parameter associated with the second communication signal to present a modified second communication signal at a first output locus coupled for combining the modified second communication signal with the first communication signal to present an improved communication signal at a second output locus. The at least one undesired signal component affects the improved communication signal less than the at least one undesired signal component affects the first communication signal.

Tracking Apparatus, System And Method

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US Patent:
7183922, Feb 27, 2007
Filed:
Oct 6, 2004
Appl. No.:
10/959562
Inventors:
Greg Mendolia - Hollis NH, US
John Kvarnstrand - Columbia MD, US
Bing Foo - Rockville MD, US
Cornelis du Toit - Ellicott City MD, US
Nicolaas du Toit - Columbia MD, US
Assignee:
Paratek Microwave, Inc. - Columbia MD
International Classification:
G08B 13/14
US Classification:
3405721, 3405727
Abstract:
An apparatus capable of tracking a target, comprising at least one near-field focused antenna comprising an array of elements and a phase shifter to form multiple fixed beams in the near-field, a sensor capable of sensing the location of the target, and a controller capable of accepting position information and capable of activating the proper fixed beam along a course so as to enable the near-field focused beams to track the target. The array of elements may be substantially linear and the sensor may be optical, mechanical, thermal, or sonic position detection subsystems.

Rfid Tag Reading System And Method

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US Patent:
7187288, Mar 6, 2007
Filed:
Oct 6, 2004
Appl. No.:
10/959633
Inventors:
Greg Mendolia - Hollis NH, US
John Kvarnstrand - Columbia MD, US
Bing Foo - Rockville MD, US
Cornelius du Toit - Ellicott City MD, US
Nicolaas du Toit - Columbia MD, US
Assignee:
Paratek Microwave, Inc. - Columbia MD
International Classification:
G08B 13/14
US Classification:
3405721, 3405727
Abstract:
An embodiment of the present invention provides an RFID tag reading system, comprising an antenna system associated with a portal through which said RFID tag may pass, said antenna system comprising: a plurality of non-uniformly spaced antenna elements arranged substantially linearly; a power divider for dividing transmit power thereby coupling signals to said plurality of antenna elements; and a beamforming network capable of phase shifting the signals between the power divider and the plurality of antenna elements such that radiated signals from each antenna element add coherently such that the radiated electromagnetic energy is focused at a focal point in the near field region or in the Fresnel region of said antenna system.

Tunable Filters Having Variable Bandwidth And Variable Delay

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US Patent:
20030052750, Mar 20, 2003
Filed:
Sep 20, 2002
Appl. No.:
10/252139
Inventors:
Khosro Shamsaifar - Ellicot City MD, US
Yongfei Zhu - Cloumbia MD, US
John Kvarnstrand - Ellicott City MD, US
Louise Sengupta - Ellicott City MD, US
International Classification:
H01P001/20
US Classification:
333/202000, 333/205000
Abstract:
A tunable electrical filter constructed pursuant to the teachings of the present invention includes: (a) a plurality of resonator units coupled between an input locus and an output locus; and (b) a plurality of tunable dielectric varactor units; respective individual varactor units of the plurality of varactor units being coupled between respective pairs of the plurality of resonator units, coupled between the plurality of resonator units and the input locus, and coupled between the plurality of resonator units and the output locus.

Wireless Local Area Network And Antenna Used Therein

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US Patent:
20030176179, Sep 18, 2003
Filed:
Mar 14, 2003
Appl. No.:
10/388788
Inventors:
Ken Hersey - Clarksville MD, US
Shuguang Chen - Ellicott City MD, US
Cornelis Du Toit - Ellicott City MD, US
John Kvarnstrand - Columbia MD, US
Jay Patel - Columbia MD, US
Donya He - Montgomery Vilage MD, US
Peter Acsadi - Parkton MD, US
Chenggang Sui - Ellicott City MD, US
International Classification:
H04B001/16
US Classification:
455/334000, 455/130000
Abstract:
A wireless local area network that utilizes a dynamically reconfigurable wireless network antenna that comprises at least one multi-layered RF module, said at least one RF module further comprising at least one RF connector for receipt of at least one RF signal and at least one layer of tunable dielectric material and one layer of metal fabricated into said RF module; an RF motherboard for acceptance of RF signals and distribution of the transmit energy to said RF module at the appropriate phases to generate a beam in the commanded direction and width; and a controller for determining the correct voltage signal to send to said at least one multi-layered RF module.

Antenna System And Method

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US Patent:
20050159187, Jul 21, 2005
Filed:
Oct 6, 2004
Appl. No.:
10/959559
Inventors:
Greg Mendolia - Hollis NH, US
John Kvarnstrand - Columbia MD, US
Bing Foo - Rockville MD, US
Cornelis Toit - Ellicott City MD, US
Nicolaas Toit - Columbia MD, US
International Classification:
H04B001/06
H04B007/00
H01Q003/22
H01Q003/24
US Classification:
455562100, 455575700, 455272000, 342368000, 343702000
Abstract:
An embodiment of the present invention provides an antenna system, comprising a plurality of non-uniformly spaced antenna elements arranged substantially linearly, a power divider for dividing transmit power thereby coupling signals to the plurality of antenna elements, a phase shifter capable of phase shifting the signals between the power divider and the plurality of antenna elements such that radiated signals from each antenna element add coherently such that the radiated electromagnetic energy may be focused at a focal point in the near field region or in the Fresnel region of the antenna system. An embodiment of the present invention may also provide at least one additional receive antenna element capable of receiving signals backscattered from at least one RFID tag located in the near field of the focused array and the divider may create substantially equal power levels feeding each antenna element. The antenna elements may be similar or identical and each element may be oriented such that the individual element main beam may point in a unique direction.

Tunable Filters Having Variable Bandwidth And Variable Delay

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US Patent:
20050200422, Sep 15, 2005
Filed:
Feb 25, 2005
Appl. No.:
11/068453
Inventors:
Khosro Shamsaifar - Ellicott City MD, US
Yongfei Zhu - Ellicott City MD, US
John Kvarnstrand - Columbia MD, US
Louise Sengupta - Ellicott City MD, US
International Classification:
H04B003/04
US Classification:
333017100
Abstract:
An embodiment of the present invention further provides an apparatus capable of reducing selected signal components in a communication link comprising a signal line conveying a communication signal including a desired signal component and at least one undesired signal component; a first signal loop coupled to the first signal line capable of generating a signal such that when combined with the first signal line reduces a first of the at least one undesired signal components; and a second signal loop coupled to the first signal line capable of generating a signal such that when combined with the first signal line reduces a second of the at least one undesired signal components. The first signal loop may include a tunable delay enabling the generation of the signal that when combined with the first signal line reduces a first of the at least one undesired signal components. Further, the second signal loop may include a tunable delay enabling the generation of the signal that when combined with the first signal line reduces a second of the at least one undesired signal components. The first of the at least one undesired signal components may be intermodulation distortion and the adding of a signal generated by the first signal loop may reduce or eliminate it. Further, a second of the at least one undesired signal components may be receive signal distortion and the adding of a signal generated by the second signal loop may reduce or eliminate it.
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John E Kvarnstrand from Columbia, MD, age ~54 Get Report