James E Mclean

Address:

6314 Gato Path, Austin, TX 78731

VIN:

1GNZKMEG8AR277241

Make:

CHEVROLET

Model:

SUBURBAN

Year:

2010

US Patent:

6337608, Jan 8, 2002

Filed:

Sep 22, 1999

Appl. No.:

09/401630

Inventors:

James Stuart McLean - Austin TX
Gentry Elizabeth Crook - Austin TX

Assignee:

TDK RF Solutions, Inc. - Austin TX

International Classification:

H01P 510

US Classification:

333 35, 333 32, 333 26, 336182

Abstract:

A transformer for connection between a generator and a load may be formed by connecting n transmission lines together, in series at one end and in parallel at the other end. The transmission lines are configured to each have a characteristic impedance of {square root over (R +L |Z +L (f +L |)}, where f is the frequency at which each transmission line is one quarter of a wavelength long (quarter-wavelength frequency), |Z (f )| is the magnitude of the load impedance at the quarter-wavelength frequency, and R is the generator resistance. The transformer exhibits a frequency-dependent impedance transformation ratio, allowing a more efficient impedance match of a generator to a load having a frequency-dependent impedance, such as an antenna.

US Patent:

6515632, Feb 4, 2003

Filed:

Jul 12, 2001

Appl. No.:

09/905150

Inventors:

James S. McLean - Austin TX

Assignee:

TDK RF Solutions - Cedar Park TX

International Classification:

H01Q 1112

US Classification:

343741, 343742

Abstract:

An antenna includes a conductive loop with multiple feed points spaced around the loop. The loop may be opened at each feed point, thereby forming multiple loop portions. In an embodiment, the antenna may be a shielded loop antenna having multiple shielded feed lines. A kit including one or more components of such a shielded loop antenna may include a conductive structure in the form of a loop having multiple radial arms. In an embodiment of a method for forming an antenna, multiple feed points may be spaced apart around a conductive loop, and a respective feed line coupled to each of the feed points. In an embodiment, the feed lines may be shielded lines connected together at a shunt connection. The antenna may produce an isotropic radiation pattern similar to that of an electrically small antenna, but from an antenna of moderate electrical size.

US Patent:

6657601, Dec 2, 2003

Filed:

Dec 21, 2001

Appl. No.:

10/032053

Inventors:

James S. McLean - Austin TX

Assignee:

TDK RF Solutions - Cedar Park TX

International Classification:

H01Q 916

US Classification:

343792, 343791, 343821

Abstract:

The present invention provides a metrology antenna system that combines a sleeve dipole antenna having two coaxial input ports with a balancing network. This combination (1) minimizes or eliminates spurious radiation from the balancing network (2) provides for a symmetric pair of feed regions which may be made arbitrarily small, and (3) provides for an essentially perfect impedance match to a broad range of resistive source impedances. The present invention provides a fabrication of arbitrarily small feed regions such that dipoles can be realized at high frequencies at little manufacturing cost.

US Patent:

6677912, Jan 13, 2004

Filed:

Dec 13, 2001

Appl. No.:

10/022759

Inventors:

James S. McLean - Austin TX

Assignee:

TDK RF Solutions - Cedar Park TX

International Classification:

H01Q 1110

US Classification:

3437925, 343810, 174 70 A, 174102 R

Abstract:

A conductive member may include a conductor having a pair of opposed parallel surfaces and a cable guide arranged inside the conductor. In another embodiment, a conductive member may include a conductive bar having a pair of opposed parallel surfaces and a convex surface connecting respective first ends of the pair of opposed parallel surfaces to one another. An embodiment of a method for forming a conductive member includes forming a cable guide arranged inside a conductor having opposed parallel surfaces, where the cable guide is oriented in a direction substantially parallel to the opposed parallel surfaces. In an embodiment of an antenna, the antenna includes a conductor having a pair of opposed lateral surfaces, and a cable guide arranged inside the conductor and oriented in a direction substantially parallel to that of the opposed parallel surfaces.

US Patent:

7030829, Apr 18, 2006

Filed:

Dec 4, 2003

Appl. No.:

10/727410

Inventors:

James S. McLean - Austin TX, US

Assignee:

TDK RF Solutions - Cedar Park TX

International Classification:

H01Q 11/10

US Classification:

3437925, 343810, 174 70 A

Abstract:

A conductive member may include a conductor having a pair of opposed parallel surfaces and a cable guide arranged inside the conductor. In another embodiment, a conductive member may include a conductive bar having a pair of opposed parallel surfaces and a convex surface connecting respective first ends of the pair of opposed parallel surfaces to one another. An embodiment of a method for forming a conductive member includes forming a cable guide arranged inside a conductor having opposed parallel surfaces, where the cable guide is oriented in a direction substantially parallel to the opposed parallel surfaces. In an embodiment of an antenna, the antenna includes a conductor having a pair of opposed lateral surfaces, and a cable guide arranged inside the conductor and oriented in a direction substantially parallel to that of the opposed parallel surfaces.

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:

7215292, May 8, 2007

Filed:

Jul 5, 2005

Appl. No.:

11/175531

Inventors:

James S. McLean - Austin TX, US

Assignee:

TDK Corporation - Chiba

International Classification:

H01Q 21/00

US Classification:

343725, 343726, 343867, 343797

Abstract:

A broadband antenna including both electric and magnetic dipole radiators is provided herein. The broadband antenna may be referred to as a “P×M antenna” and may include a pair of magnetic loop elements, each having multiple feed points symmetrically spaced around the loop element. The broadband antenna may also include an electric dipole element arranged between the pair of magnetic loop elements. In general, the electric dipole element and the magnetic loop elements may be coupled together through a network of transmission lines, as opposed to being incorporated into a single radiative element.

US Patent:

7388550, Jun 17, 2008

Filed:

Oct 11, 2005

Appl. No.:

11/247944

Inventors:

James S. McLean - Austin TX, US

Assignee:

TDK Corporation - Chiba

International Classification:

H01Q 21/00
H01Q 11/02
H01Q 13/10
H01Q 9/38

US Classification:

343725, 343739, 343767, 343829

Abstract:

A low-loss, high-efficiency, broadband antenna including both electric and magnetic dipole radiators is provided herein. The broadband antenna may be referred to as a “P×M antenna” and may generally include a ground plane; a magnetic radiator formed within the ground plane; a conductive feed arranged within a first plane, which is parallel to the ground plane; and an electric radiator arranged within a second plane, which is perpendicular to the ground plane and coupled at one end to the conductive feed. According to a particular aspect of the invention, the electric and magnetic radiators are substantially complementary to one another and are coupled for producing a P×M radiation pattern over a broad range of operating frequencies. One advantage of the P×M antenna described herein is that the complementary antenna elements are combined without the use of a lossy, resistive matching network, thereby increasing the efficiency with which the P×M radiation pattern is produced.