Choon Kyoung Lee

US Patent:

6362785, Mar 26, 2002

Filed:

Oct 29, 1999

Appl. No.:

09/430258

Inventors:

Vahakn Nalbandian - Ocean NJ
Choon Sae Lee - Dallas TX

Assignee:

The United States of America as repesented by the Secretary of the Army - Washington DC

International Classification:

H01Q 138

US Classification:

343700MS, 343846

Abstract:

A first and a second conductive patch of a compact cylindrical microstrip antenna are connected at a junction point to shorten the length of the impedance transition from one edge, where the wave impedance vanishes, to the other patch edge, where the impedance becomes very large. The second conductive patch is wider than the first conductive patch and one end of the first conductive patch is shorted with the ground plane. The effective impedance to be satisfied by the narrower strip at the junction is greatly reduced by the presence of the junction of two different patches, which substantially decreases the size of the antenna at a given operation frequency.

US Patent:

6509873, Jan 21, 2003

Filed:

Oct 16, 2000

Appl. No.:

09/688419

Inventors:

Vahakn Nalbandian - Ocean NJ
Choon S. Lee - Dallas TX

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 136

US Classification:

343700MS, 343731, 343769

Abstract:

The present invention is an antenna comprising a microstrip having upper and lower layers for producing leaky wave radiation. Circularly shaped patches are located on the two layers for circularly polarizing the leaky wave radiation. The present invention provides a microstrip antenna that can produce wideband, circularly polarized radiation. The antenna, therefore, is a compact, low cost, rugged, conformal, planar, and circularly polarized microstrip antenna. The antenna combines the advantages of wideband circularly polarized radiation with the advantages of lightweight, low profile, low cost, and planar microstrip antennas.

US Patent:

61666939, Dec 26, 2000

Filed:

Mar 9, 1999

Appl. No.:

9/285185

Inventors:

Vahakn Nalbandian - Tinton Falls NJ
Choon S. Lee - Dallas TX

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 138

US Classification:

343700MS

Abstract:

The present invention is a microstrip antenna which produces ultrawide band leaky wave radiation. The antenna produces leaky wave radiation, then trs the leaky wave radiation to produce an ultrawide bandwidth. The antenna includes tapered metal patches which taper the radiation. The antenna gives an ultrawide bandwidth performance of greater than a 4:1 ratio.

US Patent:

60055200, Dec 21, 1999

Filed:

Mar 30, 1998

Appl. No.:

9/050149

Inventors:

Vahakn Nalbandian - Ocean NJ
Choon Sae Lee - Dallas TX

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 138

US Classification:

343700MS

Abstract:

A wideband leaky-wave microstrip antenna having two elongated rectangular nductive patches separated by a gap on a first dielectric material and an elongated rectangular conductive coupling patch on a second dielectric material placed over the gap. The selective placement of the conductive patches and the gap formed thereby permits impedance matching resulting in a leaky-wave propagation mode. Non-radiating modes of propagation are not excited, thereby enhancing the leaky-wave mode of propagation causing radiation. This results in a relatively wide bandwidth of operation that has a main beam that is scannable as a function of frequency. The bandwidth increases substantially as the dielectric constant approaches one. The planar construction contributes to design flexibility and ease of manufacture and has many applications military and commercial communication systems.

US Patent:

54712211, Nov 28, 1995

Filed:

Jun 27, 1994

Appl. No.:

8/272911

Inventors:

Vahakn Nalbandian - Ocean NJ
Choon S. Lee - Dallas TX

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 138

US Classification:

343700MS

Abstract:

A dual-frequency microstrip antenna has three strips of bare low-dielectric aterial alternating with two strips of copper-clad (one side) high-dielectric material bonded close together on a copper plate having a feed inserted therethrough. A copper-claded layer (one side) low-dielectric material is placed over the five strips and bonded simultaneously. The inner strips separate the region of high-dielectric constant from the region of low-dielectric constant. The microstrip antenna is considered to be a lossy resonating cavity enclosed by a perfect electric conductor and by a perfect magnetic conductor.

US Patent:

61666920, Dec 26, 2000

Filed:

Mar 29, 1999

Appl. No.:

9/280877

Inventors:

Vahakn Nalbandian - Ocean NJ
Choon Sae Lee - Dallas TX

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 138

US Classification:

343700MS

Abstract:

A microstrip antenna providing circularly polarized radiation formed by two layered cavities with two rectangular conductive patches. A first cavity s formed by a ground plane and a first rectangular conductive patch having a lateral dimension and coupling holes placed therein. A second cavity is formed between the first rectangular conductive path and a second rectangular conductive patch having a longitudinal dimension. The longitudinal dimension of the second rectangular conductive patch is essentially equal to the lateral dimension of the first rectangular conductive patch. The second rectangular conductive patch is coupled through the coupling holes to the first rectangular conductive patch, resulting in circularly polarized radiation. The circularly polarized antenna can easily be manufactured using conventional microstrip techniques. Additionally, bandwidth and power are improved.

US Patent:

62853252, Sep 4, 2001

Filed:

Feb 16, 2000

Appl. No.:

9/505090

Inventors:

Vahakn Nalbandian - Ocean NJ
Choon Sae Lee - Dallas TX

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 302

US Classification:

343700MS

Abstract:

A compact wideband leaky-wave excitation microstrip antenna is provided by a group of microstrip patches disposed on a top region of a dielectric substrate stacked on a conductive ground plane. The top region of the dielectric substrate and the dielectric substrate can be composed of either the same or different dielectric materials. A means for feeding an RF signal, which can be a center feed pin, that normally touches the top conducting patch is electrically isolated from the radiating patches. This arrangement confines the feed current within the probe pin to give an increased input resistance. The compact wideband leaky-wave excitation microstrip antenna permits significant reductions in antenna size, resulting in microstrip antennas with a smaller surface area.

US Patent:

53193784, Jun 7, 1994

Filed:

Oct 9, 1992

Appl. No.:

7/959022

Inventors:

Vahakn Nalbandian - Ocean NJ
Choon S. Lee - Dallas TX

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 138

US Classification:

343700MS

Abstract:

A microstrip antenna capable of dual-frequency operation. The antenna comprises a microstrip having a thin, rectangular metal strip that is supported above a conductive ground plane by two dielectric layers which are separated by an air gap or other lower dielectric constant material. Conducting side walls and a rear wall extend between the ground plane and the strip. The ground plane, the strip, the walls and an opening at the front cooperate to form a rectangular resonant cavity. In essence, the cavity is surrounded by conducting surfaces except for the front opening and a small opening in the ground plane that accommodates an antenna feed. The front opening of the cavity functions as an antenna aperture through which the antenna transmits and/or receives energy. The antenna feed is a coaxial transmission line that provides a means for coupling the antenna to an external circuit. The spaced dielectric layers and the air gap produces higher-order modes which causes dual frequencies.

Address:

1223 W 33 Pl, Chicago, IL 60608

Phone:

(312)6505853

VIN:

5FNRL5H69CB115920

Make:

HONDA

Model:

ODYSSEY

Year:

2012