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William E Dolash

from Purcell, OK
Age ~81

William Dolash Phones & Addresses

  • Purcell, OK
  • 4361 Mission Blvd #165, Montclair, CA 91763 (909) 591-6637
  • 10606 7Th St, Rancho Cucamonga, CA 91730
  • Pomona, CA
  • Fontana, CA
  • 4361 Mission Blvd SPC 165, Montclair, CA 91763

Work

Position: Professional/Technical

Education

Degree: Graduate or professional degree

Publications

Us Patents

Quasi-Optical Variable Beamsplitter

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US Patent:
6580561, Jun 17, 2003
Filed:
Aug 23, 2001
Appl. No.:
09/938116
Inventors:
David D. Crouch - Corona CA
William E. Dolash - Montclair CA
Assignee:
Raytheon Company - Lexington MA
International Classification:
G02B 2710
US Classification:
359618, 359629, 359636, 359196
Abstract:
A variable beamsplitter ( ) for use with quasi-optical millimeter-wave beams. The beamsplitter ( ) consists of a circular metal plate ( ) into which a periodic array ( ) of rectangular slots is cut. The plate ( ) is arranged so that the incident millimeter-wave beam is incident at an angle of 45Â relative to the surface of the plate ( ). The polarization of the incident beam is parallel to the surface of the plate ( ). When the orientation of the plate ( ) is such that the electric field is perpendicular to the slots (i. e. , the electric field is directed across the narrow dimension of the slots), the plate ( ) transmits nearly 100% of the incident power. If the plate is rotated about its axis by 90Â (while maintaining a 45Â angle between the incident beam and the plate) so that the incident electric field is parallel to the slots, then the plate ( ) transmits 0% and reflects nearly 100% of the incident power at an angle of 90Â relative to the incident beam. By varying the angle of rotation between 0Â and 90Â, both the reflected and transmitted power can be varied continuously between 0% and 100% of the incident power.

Reflecting Surfaces Having Geometries Independent Of Geometries Of Wavefronts Reflected Therefrom

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US Patent:
6768468, Jul 27, 2004
Filed:
Sep 27, 2001
Appl. No.:
09/965206
Inventors:
David D. Crouch - Corona CA
William E. Dolash - Montclair CA
Assignee:
Raytheon Company - Waltham MA
International Classification:
H01Q 1908
US Classification:
343753, 343909
Abstract:
A flat metal plate ( ) has a plurality of holes ( ) that have a property that changes across the surface of the plate so that the flat plate ( ) mimics the behavior of a curved wavefront transformer. The changing property can include a dimension, such as radius or depth, such that the holes ( ) near the center of the plate ( ) are smaller, for example, than the holes ( ) further away from the center of the plate ( ). The size of each hole ( ) is a function of the local phase change imparted on an electromagnetic wave of a particular wavelength or frequency that hits the hole ( ), plus the propagation phase change that occurs in the reflected wave exiting the hole ( ) as it travels the distance between the hole ( ) and the focal point.

Optically Transparent Millimeter Wave Reflector

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US Patent:
6864857, Mar 8, 2005
Filed:
Jan 10, 2002
Appl. No.:
10/044691
Inventors:
David D. Crouch - Corona CA, US
William E. Dolash - Montclair CA, US
Assignee:
Raytheon Company - Waltham MA
International Classification:
H01Q015/14
US Classification:
343912, 343909
Abstract:
An optically transparent dielectric reflector () that reflects an incident millimeter-wave beam at a design frequency. The reflector () includes layers of different optically transparent dielectric materials. The thickness of the individual layers is chosen so that the transmitted waves cancel almost completely in the forward direction, yielding a high degree of transmission loss and substantial reflection. In the preferred embodiment, the invention is comprised of alternating layers of optical sapphire and air. In the best mode, there are seven sapphire layers, with outer sapphire layers () having a nominal thickness of 70. 8 mils, inner sapphire layers () with a nominal thickness of 30. 4 mils, and air layers have a nominal thickness of 32. 0 mils Vented metal spacers () are used to maintain optimal thickness of air layers.

Multiple-Port Patch Antenna

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US Patent:
7209080, Apr 24, 2007
Filed:
Jul 1, 2004
Appl. No.:
10/883093
Inventors:
David D. Crouch - Corona CA, US
Michael Sotelo - Chino CA, US
William E. Dolash - Montclair CA, US
Assignee:
Raytheon Co. - Waltham MA
International Classification:
H01Q 1/38
H01Q 13/10
US Classification:
343700MS, 343770
Abstract:
A system and method for combining and radiating electromagnetic energy. The invention includes a novel antenna comprising a first dielectric substrate having opposite first and second surfaces, a patch of conducting material disposed on the first surface, a ground plane of conducting material disposed on the second surface, and at least three input ports, each input coupled to the patch at a feed point. The feed points are positioned to minimize the total power reflected from each input port. In an illustrative embodiment, the feed points are equally distributed around a circle having the same center as the patch and having a radius chosen to minimize the reflections at each input. In accordance with the novel method of the present invention, the outputs of multiple sources are combined in the antenna itself, by coupling the sources directly to the antenna.

Reflect Array Antennas Having Monolithic Sub-Arrays With Improved Dc Bias Current Paths

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US Patent:
7423601, Sep 9, 2008
Filed:
Oct 20, 2005
Appl. No.:
11/254460
Inventors:
Kenneth W. Brown - Yucaipa CA, US
George G. Jones - Riverside CA, US
Andrew K. Brown - Victorville CA, US
William E. Dolash - Montclair CA, US
Assignee:
Raytheon Company - Waltham MA
International Classification:
H01Q 19/06
US Classification:
343754, 343700 MS, 343853, 343912
Abstract:
Embodiments of active array antennas are generally described herein. Other embodiments may be described and claimed. In some embodiments, a reflect array antenna includes an array of rectangular monolithic sub-array modules arranged in a non-uniform pattern to leave a plurality of rectangular gaps in the pattern. A DC feed pin located within each gap may provide DC bias current to the sub-array modules. The sub-array modules may be mounted on a heat sink in the non-uniform pattern. The heat sink may have holes aligned with the gaps to allow passage of the DC feed pins. In some embodiments, an array cooling assembly may be coupled to the back of the heat sink to cool the reflect array antenna with a coolant.

Foldable Reflect Array

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US Patent:
7920100, Apr 5, 2011
Filed:
Jul 8, 2008
Appl. No.:
12/169580
Inventors:
Kenneth W. Brown - Yucaipa CA, US
William E. Dolash - Montclair CA, US
Travis B. Feenstra - Redlands CA, US
Michael J. Sotelo - Chino CA, US
Assignee:
Raytheon Company - Waltham MA
International Classification:
H01Q 1/08
H01Q 19/10
US Classification:
343818, 343881, 342 10
Abstract:
A foldable reflect array may include a plurality of geometrically-flat reflect antennas. Each of the reflect antennas may include a respective plurality of antenna elements to receive and retransmit an incident wavefront, and each of the plurality of reflect antennas may be foldably coupled to at least one other of the plurality of reflect antennas.

Combining Multiple-Port Patch Antenna

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US Patent:
8081115, Dec 20, 2011
Filed:
Nov 15, 2007
Appl. No.:
11/940499
Inventors:
David Crouch - Corona CA, US
William E. Dolash - Montclair CA, US
Assignee:
Raytheon Company - Waltham MA
International Classification:
H01Q 1/38
US Classification:
343700MS, 343850
Abstract:
An exemplary apparatus providing an antenna for radiating electromagnetic energy is disclosed as having: a first dielectric substrate having opposite first and second surfaces, a patch of conducting material disposed on the first surface, a ground plane of conducting material disposed of the second surface, at least three input means coupled to a plurality of microstrip feed lines wherein the microstrip feed lines have an aspect ratio suitably configured to maximize antenna bandwidth. Disclosed features and specifications may be variously controlled, adapted or otherwise optionally modified to improve and/or modify the performance characteristics of the antenna. Exemplary embodiments of the present invention generally provide an antenna for providing wideband power combining and wideband radiation functions.

Modular Solid-State Millimeter Wave (Mmw) Rf Power Source

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US Patent:
8107894, Jan 31, 2012
Filed:
Feb 16, 2009
Appl. No.:
12/371857
Inventors:
Reid F. Lowell - Ontario CA, US
Kenneth W. Brown - Yucaipa CA, US
Darin M. Gritters - Yucaipa CA, US
Andrew K. Brown - Apple Valley CA, US
Michael J. Sotelo - Chino CA, US
William E. Dolash - Montclair CA, US
Travis B. Feenstra - Redlands CA, US
Assignee:
Raytheon Company - Waltham MA
International Classification:
H04B 1/38
US Classification:
455 902, 455103, 343893
Abstract:
A modular solid-state MMW power source based on a topology of the lens array amplifier provides both the flexibility to scale output power and effective thermal management. The modular power source includes a single submodule that uses one or more power dividers and one or more solid-state amplification stages to divide and amplify an RF input signal into R amplified RF signals. The submodule is mounted (suitably in the X-Y plane) on the surface of a heat sink, suitably coupled to a cold backplane, to remove heat. R 1:N low loss power dividers route the amplified RF signals to R*N radiating elements. Each of the 1:N power dividers suitably reside in the X-Z plane and are stacked in the Y direction to provide a planar output of the R*N radiating elements in the Y-Z plane. Placement of the amplifier chips on the single submodule decouples the number of amplifier chips, hence output power, from the number of radiating elements. Placement of the amplifier chips away from the radiating face provides a short path with large thermal cross-section through the heat sink to the backplane to remove heat.
William E Dolash from Purcell, OK, age ~81 Get Report