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Patent 7928924 Click For Printable Version of This Patent
Patent Information:  USPTO Site Listing

Patent Number: 7928924
Case ID: 0
Patent Title: Variable position antenna shield
Status: ACTIVE
Status Date: 11/21/2011 2:17:04 PM
Issue Date: 4/19/2011
Filed Date: 5/28/2008
Serial #: 2/128,531
Assignee Name: United States of America as represented by Secretary of the Navy (Washington, DC)
Inventor(s): Hendrickson, Lief M.
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

For some receiving antennas, there has been a long-standing need to shield the antenna from electromagnetic interference from a variable and changeable direction relative to the antenna position. Similarly, for some transmitting antennas, there has been a need to reduce the intensity of transmitted signals in a variable and changeable direction relative to the antenna position.

Practitioners have attempted to address these needs by using various forms of radiation shielding devices. However, while the prior art radiation shielding devices fulfill their respective objectives and requirements, the prior art does not disclose a variable position antenna shield (VPAS).

SUMMARY

The foregoing needs are met to a great extent by the apparatuses and methods disclosed herein. In particular, a variable position antenna shield (VPAS) is described that provides a mechanism for attenuating radio interference signals and other electromagnetic waves usi . . . . More
Abstract:
A variable position antenna shield (VPAS) is described that provides a mechanism for attenuating radio interference signals and other electromagnetic waves using a movable shield. The VPAS contains an antenna assembly, an antenna, and a patch variably positioned exterior to the antenna, wherein the patch attenuates passage of electromagnetic radiation such that the passage of electromagnetic radiation through the patch is substantially blocked, the patch being variably positioned to affect the directivity pattern of the antenna.
Claims:
What is claimed is:

1. A variable position antenna shield, comprising: an antenna; and a patch variably positioned exterior to the antenna, wherein the patch attenuates passage of electromagnetic radiation such that the passage of electromagnetic radiation through the patch is substantially blocked, the patch being variably positioned to affect the directivity pattern of the antenna, wherein the patch is attached to a structural shell having an opening for an antenna system support.

2. The assembly of claim 1, wherein the structural shell has a shape corresponding to that of a body of revolution.

3. The assembly of claim 1, wherein the patch is attached using a temporary attachment mechanism, thereby allowing adjustment of a position of the patch on the structural shell.

4. The assembly of claim 1, wherein the structural shell is made of a material substantially transparent to the passage of radio waves.

5. The assembly of claim 4, wher . . . . More