Robert Michael Sutton

US Patent:

7161550, Jan 9, 2007

Filed:

Apr 18, 2005

Appl. No.:

11/108394

Inventors:

James S. McLean - Austin TX, US
Robert A. Sutton - Austin TX, US

Assignee:

TDK Corporation - Chiba

International Classification:

H01Q 13/00

US Classification:

343786, 343787

Abstract:

As provided herein, a dual- or quad-ridged broadband horn antenna may include a pair of conductive antenna elements arranged opposite one another for guiding an electromagnetic wave in a longitudinal direction through the horn antenna. In some cases, the pair of conductive antenna elements may include substantially convex inner surfaces and appropriately shaped outer surfaces. The convex inner surfaces may generally function to direct or guide the radiated energy without disturbing the intended radiation pattern. To maintain the intended radiation pattern, the broadband horn antenna may also include a pair of tapered extension elements, each coupled to an outer surface of a different one of the antenna elements at one end thereof. In some cases, a magnetic material may be arranged upon at least a portion of the antenna elements to restrict surface currents to flowing along the inner surfaces only. In some cases, longitudinal grooves may be formed within the inner surfaces to restrict surface currents from flowing in a direction transverse to the longitudinal direction.

US Patent:

8159240, Apr 17, 2012

Filed:

Jan 9, 2009

Appl. No.:

12/351044

Inventors:

James S. McLean - Austin TX, US
Robert A. Sutton - Austin TX, US

Assignee:

TDK Corporation - Chiba

International Classification:

G01R 29/20

US Classification:

324726, 324127, 336180

Abstract:

A Bulk Current Injection (BCI) transformer is provided herein with a magnetic core and a plurality of windings. The magnetic core is configured for encircling one or more electrical conductors under test. Each of the plurality of windings are wrapped, at least in part, around a longitudinal dimension of the magnetic core and spaced apart around an azimuthal dimension of the magnetic core. During injection tests, a power source may be coupled for supplying current to each of the windings at a respective “feed point. ” Arranging multiple feed points around the magnetic core enables current flow through the windings to generate an azimuthally-uniform magnetic flux density in the magnetic core. The uniform magnetic flux density enables the BCI transformer to excite only common mode currents in the electrical conductors under test. BCI test methods, including injection tests and current sensing tests are also provided herein, along with a test setup for characterizing BCI transformers.

US Patent:

8593363, Nov 26, 2013

Filed:

Jan 27, 2011

Appl. No.:

13/015280

Inventors:

James McLean - Austin TX, US
Kunio Yata - Tokyo, JP
Robert Sutton - Austin TX, US
Hidetsugu Sakou - Tokyo, JP
Nobutaka Misawa - Tokyo, JP

Assignee:

TDK Corporation - Chiba

International Classification:

H01Q 9/16

US Classification:

343792, 343822

Abstract:

An end-fed sleeve dipole is provided herein with improved impedance match and increased bandwidth by incorporating a -wavelength transformer in the antenna design. The -wavelength transformer is compatible with a number of different choking schemes, including but not limited to, a single -wave choke sleeve, a single -wave choke sleeve with additional ferrite beads, and two or more -wave choke sleeves with or without ferrite beads. In some embodiments, one or more shunt resonators may be used to provide additional impedance compensation.

US Patent:

20130249541, Sep 26, 2013

Filed:

Mar 22, 2013

Appl. No.:

13/849306

Inventors:

- Tokyo, JP
Robert Sutton - Cedar Park TX, US

Assignee:

TDK Corporation - Tokyo

International Classification:

G01R 33/12

US Classification:

324239

Abstract:

A system, such as a magnetic immunity testing system, can include a first coil configured to generate a first magnetic field. The first coil can be disposed on a first side of a scanning volume and can have a first feed for supplying electric current to the first coil. A second coil can be similarly configured on an opposite side of a scanning volume, and a second magnetic field from the second coil can be combined with the first magnetic field to form a combined magnetic field. The coils can be provided with transporters that translate coils in at least one dimension. The system can also include a controller that is configured to control the transporters and the feeds to provide the combined magnetic field as a controlled and calibrated magnetic field over the scanning volume.