Site Search:











Contact Us

DoD TTIPT

Login
(Register Here)
DOD TechMatch Sponsors
Patent View
 Back to Listing
Patent 7994992 Click For Printable Version of This Patent
Patent Information:  USPTO Site Listing

Patent Number: 7994992
Case ID: 0
Patent Title: Multiband current probe fed antenna
Status: ACTIVE
Status Date: 11/21/2011 2:17:10 PM
Issue Date: 8/9/2011
Filed Date: 10/4/2007
Serial #: 1/867,046
Assignee Name: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Inventor(s): Tam, Daniel , Schukantz, Jr., James H. , Abramo, Robert S. , Hansen, Peder , Logan, James C. , Hurdsman, David E.
Lab Information:  View Lab Profile

Lab Name: SPAWAR Systems Center, Pacific
Location: 53560 Hull Street
San Diego, CA 92152-5001
Contact: Contact Lab About This Patent
   
Description:
BACKGROUND OF THE INVENTION

With increasing numbers of wireless communications systems available today more and more antennas are required to support them. In many situations the available real estate limits the number of additional antennas that may be added to a site. For example, the area available on building rooftops, and exterior surfaces of automobiles, aircraft, and sea craft, which often serve as antenna placement locations, is particularly limited. There exists a need for a multiple-band antenna with a relatively small footprint.

BRIEF DESCRIPTION OF THE DRAWINGS

Throughout the several views, like elements are referenced using like references.

FIG. 1 is a perspective view of the multi-band current probe antenna.

FIG. 2A shows a horizontal cross-sectional view of a current probe.

FIG. 2B shows a vertical cross-sectional view of a current probe.

FIG. 3 illustrates an operational concept of an embodiment of a curre . . . . More
Abstract:
A multi-band antenna comprising a conductive structure and a plurality of current probes coupled around the conductive structure. Each current probe is designed to receive and transmit in a substantially different frequency band than the other current probes. The current probes are positioned on the conductive structure so as to effectively create a plurality of transmit/receive antennas such that each respective antenna has a voltage standing wave ratio (VSWR) of less than or equal to approximately 3:1 for a given range within each respective frequency band.
Claims:
We claim:

1. A multi-feed, single-element, multi-band antenna comprising: a conductive structure; a plurality of current probes, each current probe comprising a magnetic core, wherein each core has an aperture, wherein the current probes are mounted to the conductive structure without insulating chokes or traps such that a corresponding portion of the same conductive structure is positioned within each aperture such that RF energy is transferred between the current probes and the conductive structure by way of magnetic induction; wherein each current probe has a separate feed and is designed to receive and transmit in a substantially different frequency band than the other current probes; and wherein the current probes are positioned on the conductive structure such that the combination of the conductive structure and the current probes effectively creates a plurality of magnetic-field-coupled transmit/receive antennas such that each respective antenna has a voltage standin . . . . More