Michael J Siegler

US Patent:

20040036655, Feb 26, 2004

Filed:

Mar 20, 2003

Appl. No.:

10/395902

Inventors:

Robert Sainati - Bloomington MN, US
Michael Siegler - Eagan MN, US

International Classification:

H01Q001/24
H01Q009/28

US Classification:

343/702000, 343/795000

Abstract:

The invention provides a multi-layer antenna structure for use in a wireless communication system. The antenna may be integrated within a multi-layer circuit structure such as a multi-layer printed circuit board. The multi-layer antenna structure may include, for example, a radiating component and a conductive strip feed-line that electromagnetically couples to the radiating component to directly feed the radiating component. The conductive strip feed-line may be fabricated to form a balun. The conductive strip feed-line may, for example, form a quarter-wavelength open circuit in order to realize the balun. The balun may perform signal transformations, e.g., unbalanced to balanced, as well as impedance transformations. The radiating component and the conductive strip feed-line forming the balun may be formed on different layers of a multi-layer circuit structure.

US Patent:

20050116869, Jun 2, 2005

Filed:

Oct 28, 2004

Appl. No.:

10/976166

Inventors:

Michael Siegler - Inver Grove Heights MN, US
Robert Sainati - Bloomington MN, US

International Classification:

H01Q009/00

US Classification:

343749000, 3437000MS, 343895000

Abstract:

The invention provides a multi-band antenna structure for use in a wireless communication system. The antenna structure includes integrated inductive elements and capacitive elements that function as a tuned circuit to allow the antenna structure to operate in multiple frequency ranges. In particular, the capacitive elements electromagnetically couple to the inductive elements. The capacitive elements provide the inductive elements with parallel capacitance at a given set of frequencies, thereby providing the antenna structure with frequency selectivity. At a particular frequency range, the inductive elements act as short circuits, thereby lengthening the radiating elements, which radiate energy at the particular frequency. At another frequency range, the inductive components act as open circuits, virtually shortening the radiating elements in order to radiate the higher frequencies. In this manner, the multi-band antenna structure operates within multiple frequency ranges.

US Patent:

20220220795, Jul 14, 2022

Filed:

Jan 25, 2022

Appl. No.:

17/583550

Inventors:

- Fremont CA, US
Nan Zhou - Chanhassen MN, US
Ruoxi Yang - Plymouth MN, US
Michael Allen Siegler - Eden Prairie MN, US

International Classification:

E06B 1/62
C08L 95/00
E04B 1/66

Abstract:

A recording head has a near-field transducer that extends a first distance away from a media-facing surface. Two subwavelength focusing mirrors are at an end of a waveguide proximate the media-facing surface and extend a second distance away from the media-facing surface that is less than the first distance. The subwavelength mirrors are on opposite crosstrack sides of the near-field transducer and separated from each other by a crosstrack gap. The subwavelength focusing mirrors each include a first material at the media-facing surface and a plasmonic material that covers an edge of the subwavelength focusing mirror that faces the near-field transducer. The first material is more mechanically robust than the plasmonic material.

US Patent:

20140376348, Dec 25, 2014

Filed:

Jun 24, 2014

Appl. No.:

14/313540

Inventors:

- Cupertino CA, US
Tong Zhao - Eden Prairie MN, US
Michael C. Kautzky - Eagan MN, US
Ed F. Rejda - Bloomington MN, US
Kurt W. Wierman - Eden Prairie MN, US
Scott Franzen - Savage MN, US
Michael Allen Siegler - Eden Prairie MN, US

International Classification:

G11B 13/08
G11B 5/48

US Classification:

369 1333

Abstract:

Devices that include a near field transducer (NFT), the NFT including a peg having five exposed surfaces, the peg including a first material; an overlying structure; at least one intermixing layer, positioned between the peg and the overlying structure, the at least one intermixing layer positioned on at least one of the five surfaces of the peg, the intermixing layer including at least the first material and a second material.