Daniel E Harris

US Patent:

7193578, Mar 20, 2007

Filed:

Oct 7, 2005

Appl. No.:

11/245831

Inventors:

Daniel W. Harris - Mount Laurel NJ, US
Joseph W. Hahn - Clementon NJ, US

Assignee:

Lockhead Martin Corporation - Bethesda MD

International Classification:

H01Q 13/10

US Classification:

343767, 343786

Abstract:

A method for making a horn antenna array includes the steps of making first and second equal-size printed-circuit half-horn-elements, and offset-juxtaposing element pairs to make horn elements having a dielectric lip or step. A ground plane defining mutually intersecting crossed slot sets is loaded with horn elements with their lips interlocking near the slot crossings, to define the horn antenna array. The horn elements can be fed by pins extending through portions of the ground plane and into an aperture adjacent the feed elements of the horn elements. Electrical connections are made by fusion joining after the array is assembled.

US Patent:

7508338, Mar 24, 2009

Filed:

Oct 20, 2006

Appl. No.:

11/584470

Inventors:

Brian Pluymers - Haddonfield NJ, US
Marc T. Angelucci - Cherry Hill NJ, US
John Fraschilla - Hainesport NJ, US
Thomas E. McGuigan - Neptune City NJ, US
Robert B. Lewis - Hainesport NJ, US
Richard J. Heinrich - Marlton NJ, US
Daniel W. Harris - Mount Laurel NJ, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

G01S 13/00
H01Q 3/00
H05K 7/20

US Classification:

342175, 342368, 361688, 361699, 361702

Abstract:

An element support and thermal control arrangement for an active array antenna, preferably modular, using line-replaceable units (LRUs), includes a radiating-side liquid-cooled cold plate lying parallel with a liquid-cooled TR coldplate. Antenna elements are supported and cooled by the radiating cold plate, and a beamformer lies between the radiating and TR coldplates. A plurality of column coldplates are attached to the rear of the TR coldplate and define bays or volumes in which power LRUs can be fitted in thermal communication with the TR coldplate, the column coldplates, or both.

US Patent:

8081045, Dec 20, 2011

Filed:

Aug 8, 2008

Appl. No.:

12/188507

Inventors:

Mirwais Zeweri - Mount Laurel NJ, US
Daniel W. Harris - Mount Laurel NJ, US
Steven R. Long - Evesham NJ, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H03H 7/38

US Classification:

333124, 333136

Abstract:

A beamformer includes an integrated-circuit power divider/combiner including a common port. A first transmission line extends from the common port to an individual port on the integrated circuit substrate. A first portion of a second transmission line extends on the substrate from the individual port to an integrated-circuit port. A second portion of the second transmission line extends from the integrated-circuit port vertically through plural layers of an underlying printed-circuit board stack. The characteristic impedances of the first and second portions of the second transmission line, and their combined length, are selected to match the impedance at the individual port to a standard impedance.

US Patent:

8430093, Apr 30, 2013

Filed:

May 27, 2009

Appl. No.:

12/472577

Inventors:

Daniel W. Harris - Mount Laurel NJ, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

F24J 2/18

US Classification:

126685, 126683, 126694, 136246, 136248

Abstract:

A solar collector includes a collecting mirror defining a radiation-transparent window. A collimating mirror re-reflects the collected radiation through the window to a black-body absorber located behind the collecting mirror. A working fluid flows through the black-body absorber to absorb the resulting power and to transfer the power to a utilization apparatus. The collecting and collimating mirrors may be elongated (cylindrical), or they may be axially symmetric. The working fluid may flow through a separate tube, or simply be contained by an aperture in a block of insulation.

US Patent:

8519899, Aug 27, 2013

Filed:

Mar 23, 2010

Appl. No.:

12/729385

Inventors:

Vladimir Volman - Newtown PA, US
Daniel W. Harris - Mount Laurel NJ, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H01Q 19/00

US Classification:

343756, 343909

Abstract:

A dielectric-slot polarizer arrangement includes a first dielectric polarizer plate with first elongated aperture arrangement, and second and third dielectric polarizer plates, also defining elongated aperture arrangements parallel to or registered with the first aperture arrangement. The second and third dielectric plates sandwich the first plate. The bulk dielectric constant of the first plate exceeds that of the second and third plates. The effective perpendicular and parallel dielectric constants of the first plate exceed those of the second and third plates. Ideally, the dielectric plates are free of metal.

US Patent:

8618994, Dec 31, 2013

Filed:

Feb 11, 2011

Appl. No.:

13/025333

Inventors:

Daniel W. Harris - Mount Laurel NJ, US
Vladimir Volman - Newtown PA, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H01Q 19/00
H01Q 15/02

US Classification:

343756, 343909, 343911 R

Abstract:

A method for making a dielectric-slot polarizer includes affixing plural dielectric sheets in a stack with those sheets having the greatest dielectric constant toward the center of the stack. The dielectric sheets may be fused or joined to each other by heat, pressure, or both. A dielectric support sheet is affixed by adhesive to a first side of the stack to form a partially supported stack. Slots are defined through the partially supported stack down to the adhesive. A second dielectric support sheet is adhesively affixed over the slots of the stack to define the polarizer.