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Kawthar A Zaki

from Potomac, MD
Age ~83
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Also known as:
Ali E Atia, Kawthar Zaki Atia, Kawthar Zakj Atia, Ali A Atia, Kawthar Z Atia, Atia Kawthar Zaki, Kawthar Elhamid, Ali N, Akiatia Z Kawthar
Phone and address:
10841 Willow Run Ct, Rockville, MD 20854
(301) 299-4437
Related to:
Anro StinoAmro Stino, 38Rasha M Stino, 52Maher M Stino, 78Laila Stino, 78
Connected to:
Anwar A Zaki, 85Aslam P Zaki, 60Azra Zaki, 65Ezzat H Zaki, 74Ferhan Zaki, 41Isaac Zaki, 87Jamil O Zaki, 44Maged M Zaki, 37Mohammed Zaki, 65Nadine Zaki, 31

Kawthar Zaki Phones & Addresses

  • 10841 Willow Run Ct, Potomac, MD 20854 (301) 299-4437 (301) 299-7258
  • Rockville, MD
  • Seattle, WA
  • Lexington, MA
  • Fredericksburg, VA
  • Waxhaw, NC
  • College Park, MD
  • Burlington, MA

Business Records

Name / Title
Company / Classification
Phones & Addresses
Kawthar A. Zaki
President
K A Z Consulting Inc
Engineering Consultant
10841 Willow Run Ct, Rockville, MD 20854
(301) 299-4437

Publications

Us Patents

Embedded Ridge Waveguide Filters

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US Patent:
6535083, Mar 18, 2003
Filed:
Sep 4, 2001
Appl. No.:
09/944599
Inventors:
Michael A. Hageman - Millersville MD
John W. Gipprich - Millersville MD
Kawthar Zaki - Potomac MD
Assignee:
Northrop Grumman Corporation - Los Angeles CA
International Classification:
H01P 1208
US Classification:
333210, 333208
Abstract:
A ridge waveguide filter which is formed of metallized blind vias in a plurality of contiguous layers of a dielectric medium including low temperature cofired ceramic (LTCC), high temperature cofired ceramic (HTCC) or organic printed wiring boards (PWB) in the fabrication of the waveguide sidewalls and solid ground planes to provide top and bottom walls as well as in the formation of a plurality of ridge waveguide sections in an embedded ridge waveguide structure. Patterns of conductive metal are selectively printed on the outer surface of certain dielectric layers to electrically short all the vias in the ridge waveguide sections and the adjacent wall vias so that the elements behave as though they comprise a solid metal structure.

Coupling For Dual-Mode Resonators And Waveguide Filter

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US Patent:
52686590, Dec 7, 1993
Filed:
Apr 29, 1991
Appl. No.:
7/692549
Inventors:
Kawthar A. Zaki - Potomac MD
Assignee:
University of Maryland - College Park MD
International Classification:
H01P 1208
US Classification:
333209
Abstract:
Dual-mode resonators are coupled together to form a highly selective bandpass filter by means of a short section of waveguide. The short sections have cutoff frequencies beyond the passband of the filter. The coupling is adjustable over a wide range by means of adjustable screws. The coupling means is applicable to both empty cavities and dielectric-resonator-loaded cavities.

Waveguide Filters Having A Layered Dielectric Structure

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US Patent:
53829310, Jan 17, 1995
Filed:
Dec 22, 1993
Appl. No.:
8/168502
Inventors:
Andrew J. Piloto - Columbia MD
Kevin A. Leahy - Eldersburg MD
Bruce A. Flanick - Columbia MD
Kawthar A. Zaki - Potomac MD
Assignee:
Westinghouse Electric Corporation - Pittsburgh PA
International Classification:
H01P 1207
H01P 316
US Classification:
333208
Abstract:
Waveguide filters having a laminated dielectric structure for resonating at a predetermined frequency and having a series of longitudinally spaced resonators. A selected plural number of individual layers of high dielectric low temperature co-fired ceramic are laminated into a monolithic structure and then plated with a conductive material. Each of the individual layers is dimensioned and the number of layers is selected so that the unit resonates at the predetermined frequency. A waveguide filter is also described where a select plural number of contiguous layers of low temperature co-fired ceramic are laminated and plated with a conductive material. A series of vertically placed vias are positioned so as to form a perimeter of a waveguide filter. A plurality of individual layers of low temperature co-fired ceramic are laminated to the monolithic structure to form a laminated unit so that electrical components and the waveguide filter can be integrated into a single package.

Dual Mode Dielectric Resonator Filters Without Iris

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US Patent:
50831020, Jan 21, 1992
Filed:
Sep 5, 1989
Appl. No.:
7/403165
Inventors:
Kawthar A. Zaki - Potomac MD
Assignee:
University of Maryland - College Park MD
International Classification:
H01P 120
H01P 1208
US Classification:
333212
Abstract:
A microwave band pass filter including dual-mode dielectric resonators mounted in a tubular enclosure to achieve coupling among the resonators without an iris. The filter is implemented in a canonical symmetric form, as longitudinal dual-mode realization or a canonical asymmetric form. The microwave band pass filter has input and output coaxial probes located along the enclosure with tuning and coupling screws provided to enable adjustment control of the frequency of resonance of the dielectric resonators and to control the coupling of energy from one resonant mode to an orthogonal mode in the same resonator. Lastly, the coupling of energy from one resonator to an adjacent resonator is accomplished by properly placed coupling screws.

High Performance Dual Mode Microwave Filter With Cavity And Conducting Or Superconducting Loading Element

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US Patent:
58045341, Sep 8, 1998
Filed:
Apr 19, 1996
Appl. No.:
8/633705
Inventors:
Kawthar Abdelhamid Zaki - Potomac MD
Assignee:
University of Maryland - College Park MD
International Classification:
H01P 1201
H01B 1202
US Classification:
505210
Abstract:
A microwave filter has at least one resonator with a cavity and a conducting or superconducting loading element inside the cavity. The resonator also has first and second tuning screws at right angles and a mode coupling screw at 45. degree. angles to both tuning screws. This filter can achieve a high Q in a small size.

Microstrip Dual Mode Elliptic Filter With Modal Coupling Through Patch Spacing

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US Patent:
59399589, Aug 17, 1999
Filed:
Feb 18, 1997
Appl. No.:
8/802473
Inventors:
Preston W. Grounds - Davidsonville MD
Kawthar A. Zaki - Potomac MD
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
H01P 1203
US Classification:
333204
Abstract:
Disclosed is a planar dual mode microstrip filter with the coupling between similar modes on different patches governed by the spacing between the patches rather than by microstrip coupling lines between the patches. The patches are shaped to allow dual mode coupling. The materials used in building this filter were an alumina substrate with gold metalization. The filter is encased in a conducting box made from a conducting material. One advantage of the proximity coupled structure is that it reduces the number of parts, complexity and allows the filter to be realized in a smaller space than in previous dual mode designs. This filter is useful in satellite communications, radar, and cellular communications. High temperature superconductor materials can be used in a planar microstrip form.

Antenna Array Having Antenna Elements With Integrated Filters

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US Patent:
20220416426, Dec 29, 2022
Filed:
Sep 7, 2022
Appl. No.:
17/939284
Inventors:
- San Diego CA, US
Andy PILOTO - San Diego CA, US
Kawthar A. ZAKI - Potomac MD, US
Ali ATIA - Potomac MD, US
Joseph TALLO - San Diego CA, US
Tyler REID - San Diego CA, US
International Classification:
H01Q 9/04
H01Q 1/48
H01Q 21/00
H01Q 21/06
Abstract:
A phased array antenna includes multiple antenna elements where each antenna element is an antenna apparatus that includes an antenna integrated with a filter. Each antenna apparatus includes a plurality of resonators where at least some of the resonators are each enclosed in a metal cavity and at least one resonator is exposed to free space to form a radiator element. Each antenna apparatus has a filter transfer function that is at least partially determined by dimensions of the radiator element and the position of the radiator element within the antenna apparatus. The scan volume of the phased array antenna is dependent on at least one physical dimension of the filter of the antenna apparatus.

Antenna Apparatus With Integrated Filter

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US Patent:
20230016085, Jan 19, 2023
Filed:
Sep 27, 2022
Appl. No.:
17/953589
Inventors:
- San Diego CA, US
Andy PILOTO - San Diego CA, US
Kawthar A. ZAKI - Potomac MD, US
Ali ATIA - Potomac MD, US
Joseph TALLO - San Diego CA, US
Tyler REID - San Diego CA, US
International Classification:
H01Q 9/04
H01Q 1/48
H01Q 21/00
H01Q 21/06
Abstract:
An antenna apparatus includes an antenna integrated with a filter. The antenna apparatus includes a plurality of resonators where at least some of the resonators are each enclosed in a metal cavity and at least one resonator is exposed to free space to form a radiator element. The antenna apparatus has a filter transfer function that is at least partially determined by dimensions of the radiator element and the position of the radiator element within the antenna apparatus.
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Kawthar A Zaki from Potomac, MD, age ~83 Get Report