IP Library › Granted Patent US 7,061,440
Granted Patent B2
US 7,061,440 · App. 10/867,563 · Granted Jun 13, 2006

Electrically small planar antennas with inductively coupled feed

Assignee: Board of Regents, The University of Texas System
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Quick Facts
Patent No.
US 7,061,440
App. No.
10/867,563
Granted
Jun 13, 2006
Kind
B2
Abstract

Inductively coupled antennas and methods of designing the same are disclosed. Electrically small antennas having relatively high efficiency and relatively broad bandwidth may be formed by inductively coupling an antenna loop to at least one antenna winding. Such antennas may be substantially planar. Various operating characteristics of such antennas may be adjustable by and/or dependent upon the strength of the inductive coupling between an antenna winding and an antenna loop.

Claims (15)

1. An antenna, comprising:

a ground plane;

an antenna body formed by a winding, having two ends, wherein one of said two ends is connected to said ground plane; and

an antenna feed having two ends, wherein one of said two ends is connected to said ground plane, wherein a length of said antenna feed is substantially shorter than a length of said antenna body, wherein said antenna feed is inductively coupled to said antenna body.

2. The antenna of claim 1 , wherein said winding of said antenna body is a meander winding.

3. The antenna of claim 1 , wherein said winding of said antenna body is a spiral winding.

4. The antenna of claim 1 , wherein an input resistance of said antenna is controlled by a distance between said antenna body and said antenna feed.

5. The antenna of claim 1 , wherein an operating frequency of said antenna is controlled by the length of said antenna body.

6. The antenna of claim 1 , wherein an operating frequency of said antenna is controlled by the number of turns in said winding of said antenna body.

7. The antenna of claim 1 , wherein said antenna body and said antenna feed are planar structures.

8. The antenna of claim 1 , wherein said antenna body and said antenna feed are printed on a substrate.

9. The antenna of claim 1 , wherein a second one of said two ends of said winding in said antenna body is open-ended.

10. The antenna of claim 1 , wherein a second one of said two ends of said antenna feed is connected to an antenna input.

11. The antenna of claim 1 , wherein a dimension of said antenna body is less than approximately 10% of an operating wavelength of said antenna.

12. The antenna of claim 1 , wherein a dimension of said antenna body is less than approximately 4% of an operating wavelength of said antenna.

Assignments (4)
CONFIRMATORY LICENSE Recorded Nov 22, 2010
From: TEXAS, UNIVERSITY OF
To: NAVY, SECRETARY OF THE UNITED STATES OF AMERICA
Reel/Frame 025308/0307 →
CORRECTIVE ASSIGNMENT TO CORRECT THE FILED UNDER WRONG CONVEYANCE TYPE, SHOULD BE LICENSE PREVIOUSLY RECORDED ON REEL 020919 FRAME 0467. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded May 30, 2008
From: THE BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
To: INTELLECTUAL VENTURES HOLDING 40 LLC
Reel/Frame 021018/0551 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 9, 2008
From: THE BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
To: INTELLECTUAL VENTURES HOLDING 40 LLC
Reel/Frame 020919/0467 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 15, 2004
From: CHOO, HOSUNG; LING, HAO
To: BOARD OF REGENTS
Reel/Frame 015995/0549 →
Continuity (2)
Provisional Application 6047797400 · Jun 12, 2003
Related Publication 20050057409A1 · Mar 17, 2005