Willard I Henry

US Patent:

6507252, Jan 14, 2003

Filed:

Jun 21, 2001

Appl. No.:

09/886501

Inventors:

Thinh Q. Ho - Anaheim CA 92802
Stephen M. Hart - San Jose CA 95164
Willard I. Henry - San Diego CA 92154

International Classification:

H01P 1213

US Classification:

333135, 333202, 333210

Abstract:

An integrated circuit multiplexer comprises a waveguide having an interior cavity, first RF input port, and a first and second output ports; a dielectric structure positioned in the cavity; an RF input feed attached to the dielectric structure that extends through the RF input port; a first RF output feed attached to the dielectric structure that extends through the first RF output port; a second RF output feed attached to the dielectric structure that extends through the second RF output port; a first resonator pair mounted to the dielectric structure between the RF input feed and the first RF output feed, and electrically connected to the waveguide; and a second resonator pair mounted to the dielectric structure between the RF input feed and the second RF output feed, and electrically connected to the waveguide so that the first and second resonator pairs are generally coplanar. The waveguide is shaped as a right rectangular prism having a rectangular cross-sectional area characterized by a width L and a depth L , where L (0. 5), L (0. 25), and represents the center wavelength of a radio frequency signal that is input into said waveguide so that the waveguide operates in an evanescent mode in response to receiving the radio frequency signal.

US Patent:

6891514, May 10, 2005

Filed:

Mar 18, 2003

Appl. No.:

10/392489

Inventors:

Willard Henry - San Diego CA, US
Thinh Q. Ho - Anaheim CA, US
Kevin Allen - San Diego CA, US
Charles Hewett - San Diego CA, US

Assignee:

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

International Classification:

H01Q021/00

US Classification:

343893

Abstract:

An antenna system includes: a) a ground plane; b) an array of antennas affixed to the ground plane, wherein each antenna element includes a stack of antenna elements; c) a dielectric spacer affixed to the array of antennas, and e) a frequency selective surface affixed to the dielectric spacer. Each antenna element includes a radio frequency element affixed to a dielectric layer.

US Patent:

7250921, Jul 31, 2007

Filed:

Dec 18, 2003

Appl. No.:

10/740297

Inventors:

Willard I. Henry - San Diego CA, US
Thinh Q. Ho - Anaheim CA, US

Assignee:

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

International Classification:

H01Q 15/02
H01Q 15/24

US Classification:

343909, 343700 MS

Abstract:

A method and apparatus for a multiband frequency distributed circuit apparatus with FSS. The apparatus includes a circuit, a first dielectric layer, a first FSS layer, a second layer and a ground plane. The first dielectric layer is operatively coupled to the circuit. The first FSS layer is operatively coupled to the first dielectric layer and is capable of passing a first frequency band. The second layer is operatively coupled to the first FSS layer and includes a dielectric material. The ground plane is operatively coupled to the second layer. A method for implementing a multiband frequency distributed circuit is also disclosed.

US Patent:

7277725, Oct 2, 2007

Filed:

Nov 30, 2004

Appl. No.:

10/999868

Inventors:

Willard Henry - San Diego CA, US
Thinh Q. Ho - Anaheim CA, US
Kevin Allen - San Diego CA, US

Assignee:

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

International Classification:

H04M 1/00

US Classification:

4555531, 455296, 455 6713

Abstract:

A frequency agile collocated multi-signal rf distribution system. The system includes a plurality of receivers, a plurality of transmitters, a power amplification module, an antenna module and an interference reduction module. The power amplification module is operatively coupled to the plurality of transmitters and is capable of receiving and amplifying transmission signals, reducing interference and outputting amplified transmission signals. The antenna module is operatively coupled to the power amplification module and is capable of receiving amplified transmission signals, receiving reception signals and outputting reception signals. The interference reduction module is operatively coupled to the power amplification module, the antenna module and the plurality of receivers, and is capable of receiving amplified transmission signals and reception signals, reducing co-site interference in receptions signals, and outputting reception signals having reduced co-site interference to the plurality of receivers. A method for implementing a frequency agile collocated multi-signal rf distribution system is also described.

US Patent:

58158030, Sep 29, 1998

Filed:

Mar 8, 1996

Appl. No.:

8/614782

Inventors:

Thinh Q. Ho - Anaheim CA
Stephen M. Hart - San Diego CA
Gregory A. Kosinovsky - San Diego CA
Willard I. Henry - San Diego CA

Assignee:

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

International Classification:

H04B 144

US Classification:

455 78

Abstract:

An isolation circulator network includes three circulators and a 180 degree ybrid coupler for isolating an RF transmitter from a nearby RF receiver. The isolation circulator network comprises: a first circulator for transforming a first RF signal, RF. sub. 1, into a second RF signal, RF. sub. 2 and a third RF signal, RF. sub. 3 ; a second circulator for throughputting the third RF signal; a third circulator for transforming the second RF signal into a fourth RF signal, RF. sub. 4, and a fifth RF signal, RF. sub. 5, and for throughputting a sixth RF signal, RF. sub. 6 ; and a 180-degree hybrid coupler which provides a seventh RF signal, RF. sub. 7 in response to receiving the third, fifth, and sixth RF signals, where RF. sub. 7 =(RF. sub. 5 -RF. sub. 3 +RF. sub. 6).

US Patent:

63137135, Nov 6, 2001

Filed:

Sep 28, 1999

Appl. No.:

9/407835

Inventors:

Thinh Q. Ho - Anaheim CA
Stephen M. Hart - San Diego CA
Willard I. Henry - San Diego CA
Gregory A. Kosinovsky - Sunnyvale CA

Assignee:

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

International Classification:

H04B 150

US Classification:

333 11

Abstract:

A matched pair circulator antenna isolation circuit provides isolation between an antenna and one or more receivers and transmitters and may also be applied to other RF devices. A portion of the transmit signal is extracted by a first RF circulator and divided into two phase-inverted signals. The first phase-inverted signal is coupled through a first directional coupler to cancel most of the transmit signal present in the receive signal. The second phase-inverted signal is coupled through a second directional coupler to cancel remaining transmit signal in the output of the first directional coupler. The output of the second directional coupler is coupled to the input of the receiver.