Arun K Bhattacharyya, 66Palos Verdes Estates, CA

6384795, May 7, 2002

Sep 21, 2000

09/666203

Arun K. Bhattacharyya - El Segundo CA
Guy Goyette - Marina del Rey CA

Hughes Electronics Corp. - El Segundo CA

H01Q 1300

343786, 343772

A multi-step circular horn system may have several steps and may use more than one flared section based upon design considerations. In order to achieve high aperture efficiency, the aperture field distribution is close to uniform. For good cross-polar performance, the field distribution is circularly symmetric. Location and shape of the steps is determined by the wavelength of the signal being transmitted and the space constraints imposed by the antenna design. The step discontinuities generate desired modes of operation in the right proportion.

6388620, May 14, 2002

Jun 13, 2000

09/593182

Arun Bhattacharyya - El Segundo CA

Hughes Electronics Corporation - El Segundo CA

H01Q 138

343700MS, 343913

An antenna element, an antenna system, and a method for producing a signal using slot-coupled antenna elements are disclosed. The antenna element comprises an electrically conductive strip, a patch element, overlaying the electrically conductive strip, and a ground plane. The ground plane is coupled between the patch element and the electrically conductive strip and comprises an opening, at least a portion of the opening overlapping with at least a portion of the electrically conductive strip, wherein the opening and the electrically conductive strip can reflect incident radio frequency (RF) energy in a desired radiation pattern. A method in accordance with the present invention comprises illuminating a reflector with an RF signal emanating from a feed horn, wherein the reflector comprises at least one reflect array antenna element, and reflecting the RF signal from the reflect array element, wherein the reflect array element comprises an electrically conductive strip, a patch element, overlaying the electrically conductive strip, and a ground plane. The ground plane is coupled between the patch element and the electrically conductive strip and comprises an opening, at least a portion of the opening overlapping with at least a portion of the electrically conductive strip, wherein the opening and the electrically conductive strip assist in generating the desired radiation pattern.

6424299, Jul 23, 2002

Aug 9, 2001

09/925773

Alan Cha - Glendale CA
Arun Bhattacharyya - El Segundo CA

The Boeing Company - Chicago IL

H01Q 138

343700MS, 343846

A dual-band patch antenna element ( ) for circular or linear polarization. The patch element ( ) is excited by two different hybrids ( ), designed for transmit and receive bands respectively. Each hybrid ( ) electromagnetically couples a pair of orthogonal ground plane slots ( ) that excite the patch antenna ( ). The hybrid ( ) and slot ( ) dimensions for the transmit band are different from the hybrid ( ) and slot ( ) dimensions for the receive band. Isolation can be improved by connecting shunt stubs ( ) to the hybrids ( ).

6535174, Mar 18, 2003

Dec 20, 1999

09/467637

Sudhakar Rao - Torrance CA
Arun Bhattacharyya - El Segundo CA

Hughes Electronics Corporation - El Segundo CA

H01Q 1300

343786, 343772

An antenna apparatus that has an increased efficiency, and a method for increasing the efficiency of multi-mode antenna feed horns, is disclosed. The method comprises the steps of exciting, within the antenna, a desired transmission mode and an undesired transmission mode of the signal to be transmitted, and converting, within the antenna, power within the undesired transmission mode into power for the desired transmission mode of the signal to be transmitted. An antenna apparatus in accordance with the present invention comprises a feed horn having an input opening, an aperture, and a cavity, disposed between the input opening and the aperture, for suppressing an undesired transmission mode of the antenna and exciting a desired transmission mode of the antenna.

6549166, Apr 15, 2003

Aug 22, 2001

09/935471

Arun Bhattacharyya - El Segundo CA
Alan Cha - Glendale CA
James McKay - Manhattan Beach CA

The Boeing Company - Seattle WA

H01Q 138

343700MS, 343846

A patch antenna is disclosed having four ports for circular polarization that suppress the TM-02 mode, resulting in a radiation pattern that is symmetric. The axial ratio performance is consequently superior to that of two-port patch antennas. A four-port patch antenna includes a patch made of an electrically conductive material, a patch substrate coupled to the patch wherein the patch substrate is made of a dielectric material, a ground plane coupled to the patch substrate wherein the ground plane is made of an electrically conductive material having at least four slots formed therein, a feed substrate coupled to the ground plane wherein the feed substrate is made of a dielectric material, and a hybrid network coupled to the feed substrate that includes a right hand circularly polarized port, a left hand circularly polarized port, and two matched terminated ports.

6642900, Nov 4, 2003

Sep 21, 2001

09/957954

Arun Bhattacharyya - El Segundo CA
Daniel H. Roper - Redondo Beach CA

The Boeing Company - Chicago IL

H01Q 1302

343786

A multiple mode feed horn is provided for transmitting and receiving signals. The feed horn includes a transverse electric throat section, a transverse electric profile section, and a transverse electric aperture section. The transverse electric profile section propagates a first transverse electric (TE) mode. The transverse electric aperture section propagates a second TE mode. The multiple mode feed horn prevents propagation of traverse magnetic modes from said throat section to said aperture section.

6967627, Nov 22, 2005

Oct 1, 2003

10/676763

Arun Bhattacharyya - El Segundo CA, US
Daniel H. Roper - Redondo Beach CA, US

The Boeing Company - Chicago IL

H01Q013/02

343786

A multiple mode feed horn is provided for transmitting and receiving signals. The feed horn includes a transverse electric throat section, a transverse electric profile section, and a transverse electric aperture section. The transverse electric profile section propagates a first transverse electric (TE) mode. The transverse electric aperture section propagates a second TE mode. The multiple mode feed horn prevents propagation of traverse magnetic modes from said throat section to said aperture section.

7053847, May 30, 2006

Aug 11, 2004

10/917986

Steven S. Chan - Alhambra CA, US
Te Kao Wu - Rancho Palos Verdes CA, US
Arun Bhattacharyya - El Segundo CA, US
Juan Rivera - Torrance CA, US
Phillip L. Metzen - Hermosa Beach CA, US

Northrop Grumman Corporation - Los Angeles CA

H01Q 13/12
H01Q 13/10

343769, 343770

A phased array antenna structure capable of operation at millimeter-wave frequencies and having multiple ring slot radiator elements (). The RF feed structure for each radiator element includes a feed via () extending part-way through a multi-layer structure () on which the radiator elements () are formed and a strip line feed probe () extending from the via () toward the radiator element. A key feature facilitating high-frequency operation is the inclusion of multiple mode suppressors () surrounding the via () and providing a smooth transition from a coaxial mode of RF transmission to a strip line mode of RF transmission. The feed probe () is tailored to provide either a narrow-band or a wideband frequency characteristic.