Nicholas A Koumvakalis

US Patent:

7009575, Mar 7, 2006

Filed:

Feb 16, 2004

Appl. No.:

10/780536

Inventors:

Sandor Holly - Woodland Hills CA, US
Nicholas Koumvakalis - Thousand Oaks CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

H01Q 9/16

US Classification:

343820, 343793, 343814

Abstract:

A high-frequency two-dimensional antenna includes a plurality of dual-frequency antennas configured to receive signals having first and second frequencies above the microwave band of the electromagnetic spectrum. The dual-frequency antennas of the two-dimensional antenna are arrayed to an effective length to re-radiate signals at a third frequency, which is down-converted from the first and second frequencies. Each dual-frequency antenna of the two-dimensional antenna includes a plurality of dipole antennas, and a plurality of nonlinear resonant circuits. The nonlinear resonant circuits interconnect the dipole antennas and are configured to permit re-radiation of signals having the third frequency over the effective length. A method of down-converting signals having at least first and second electromagnetic radiation frequencies is also provided.

US Patent:

7473898, Jan 6, 2009

Filed:

May 17, 2006

Appl. No.:

11/436715

Inventors:

Sandor Holly - Woodland Hills CA, US
Nicholas Koumvakalis - Thousand Oaks CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

G01J 5/02

US Classification:

250343, 25033913, 25033904

Abstract:

A terahertz spectroscopy system includes a source of terahertz radiation, a detector of terahertz radiation, a source of sample gas, and a sample cell that can be cooled to cryogenic temperatures. The sample cell may be configured to receive the sample gas, received terahertz radiation from the source of terahertz radiation, provide the terahertz radiation to the detector after the terahertz radiation has passed through the sample gas, and facilitate cryogenic cooling thereof. The sample cell may be cryogenically cooled to freeze the sample gas and subsequently warmed either continuously or in steps in temperature so that individual components or groups of components of the sample gas may evaporate and thus have absorption spectra formed therefor. Enhanced resolution of absorption spectra is provided when a gas sample contains a large number of components of different gases.

US Patent:

7893862, Feb 22, 2011

Filed:

Jul 3, 2008

Appl. No.:

12/167753

Inventors:

Sandor Holly - Woodland Hills CA, US
Nicholas Koumvakalis - Thousand Oaks CA, US
Robert Alan Smith - Hampton Cove AL, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

G01S 13/04
G01S 13/88
G01V 3/12
G01S 13/00
G01V 3/00

US Classification:

342 22, 342 27, 342 59, 342 82, 342 89, 342175, 342188, 342195

Abstract:

A detection system comprises a transmitter unit, a receiver, and a processor. The transmitter unit is capable of transmitting a first collimated beam having a first frequency and a second collimated beam having a second frequency into a ground, wherein the first collimated beam and the second collimated beam overlap in the ground. The receiver is capable of monitoring for a response radio frequency signal having a frequency equal to a difference between the first frequency and the second frequency. The response radio frequency signal is generated by an object having non-linear conductive characteristics in response to receiving the first collimated beam and the second collimated beam. The processor is capable of controlling an operation of the transmitter unit and the receiver. The processor is connected to the transmitter unit and the receiver. The object is detected when the response radio frequency signal is detected by the receiver.

US Patent:

8035550, Oct 11, 2011

Filed:

Nov 3, 2008

Appl. No.:

12/264153

Inventors:

Sandor Holly - Woodland Hills CA, US
Nicholas Koumvakalis - Thousand Oaks CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

G01S 7/42
G01S 13/00
G01S 13/08

US Classification:

342175, 342 13, 342 27, 342128, 342129

Abstract:

A transmitter system can have a higher power transmitter and a lower power that are configured to transmit a pair of unbalanced radio frequency beams to a target so as to produce a difference frequency in the target. The difference frequency can disrupt operation of a device, such as a weapon. The difference frequency can provide a radar return. The use of a higher power transmitter and a lower power transmitter reduces costs, size, and weight as compared to the use of two higher power transmitters.

US Patent:

8054212, Nov 8, 2011

Filed:

Mar 27, 2009

Appl. No.:

12/412919

Inventors:

Sandor Holly - Woodland Hills CA, US
Nicholas Koumvakalis - Thousand Oaks CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

G01S 7/38

US Classification:

342 13, 342 14, 342 59

Abstract:

An apparatus comprises a transmitter system, a receiver system, and a processor unit. The transmitter system transmits first and second collimated beams having a first and second frequency. The receiver system monitors for a fundamental difference frequency signal having a difference frequency equal to a difference between the first and second frequency and a number of harmonics of the fundamental difference frequency signal. These signals are generated by an object having non-linear electrical characteristics in response to the collimated beams. The processor unit is connected to the transmitter system and the receiver system. The processor unit controls the transmitter and receiver systems to change at least one of the first and second frequencies through a range of frequencies and detect a range of fundamental difference frequency signals and the number of harmonics of the fundamental difference frequency signal in response to transmitting the collimated beams using the range of frequencies.

US Patent:

8054213, Nov 8, 2011

Filed:

Oct 13, 2009

Appl. No.:

12/578090

Inventors:

Sandor Holly - Woodland Hills CA, US
Donald Elliot Harrington - Moorpark CA, US
Nicholas Koumvakalis - Thousand Oaks CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

G01S 13/88
G01S 7/38

US Classification:

342 22, 342 27, 342 82, 342372, 342377

Abstract:

A method and apparatus for transmitting beams of electromagnetic energy. A plurality of beams having a first number of frequencies and a number of beams having a second number of frequencies are transmitted. The plurality of beams and the number of beams overlap each other at an area with a pattern of intensities in the area. Difference frequency signals having a number of difference frequencies equal to a difference between the first number of frequencies and the second number of frequencies are monitored. The difference frequency signals are generated by an object having non-linear electrical characteristics in response to receiving the plurality of beams and the number of beams.

US Patent:

8106810, Jan 31, 2012

Filed:

Nov 3, 2008

Appl. No.:

12/264128

Inventors:

Sandor Holly - Woodland Hills CA, US
Nicholas Koumvakalis - Thousand Oaks CA, US
Robert A. Smith - Hampton Cove AL, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

H01Q 17/00

US Classification:

342 1, 342 5, 343812

Abstract:

An electromagnetic radiation filter uses a plurality of dipole antennas to mitigate the transmission of electromagnetic radiation. The dipole antennas can form one or more arrays that scatter electromagnetic radiation. Examples of application include mitigating the reception of a difference frequency in non-linear radar, use in protective goggles, and use in a protective shield.

US Patent:

8130160, Mar 6, 2012

Filed:

Nov 3, 2008

Appl. No.:

12/264152

Inventors:

Richard H. Burns - North Hollywood CA, US
Sandor Holly - Woodland Hills CA, US
Nicholas Koumvakalis - Thousand Oaks CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

H01Q 19/10

US Classification:

343755, 343703

Abstract:

A composite dipole array assembly can have a composite dipole array defined by a plurality of antenna elements and a plurality of non-linear element electrically interconnecting pair of the antenna elements. A reflector can be configured to reflect electromagnetic energy toward the antenna elements. A lens can be configured to focus electromagnetic energy upon the antenna elements. In this manner, the efficiency of the composite dipole array is enhanced.