Conformal load bearing antenna structure

• US 6,198,445 B1
• Filed: 12/29/1999
• Issued: 03/06/2001
• Est. Priority Date: 12/29/1999
• Status: Expired due to Fees

• Current Assignee: Northrop Grumman Corporation
• Original Assignee: Northrop Grumman Corporation
• Inventors: Gath, James Kenneth, Durham, Michael David, Kudva, Jayanth Nandalke, Coughlin, Daniel Patrick, Alt, Kevin Herman, Lockyer, Allen John
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US09/474,213
• Time in Patent Office: 433 Days
• Field of Search: H01/Q.128, 343/705, 343/708, 343/872, 343/700.MS, 343/873, 343/895
• US Class Current: 343/705
• CPC Class Codes: H01Q 1/28 Adaptation for use in or on aircraft, missiles, satellites, or balloons
• CPC Class Codes: H01Q 1/282 Modifying the aerodynamic properties of the vehicle, e.g. projecting type aerials
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40

Abstract

A conformal load bearing antenna structure for attachment to an aircraft having an outer skin. The conformal load bearing antenna structure comprises a top face sheet and an end fed radiating element disposed thereon. Disposed adjacent to the top face sheet is a dielectric and a structural core disposed adjacent to the dielectric. In the preferred embodiment, a bottom face sheet is disposed adjacent to the structural core and an absorber is disposed adjacent to the bottom face sheet. Accordingly, the top face sheet, the dielectric, the structural core, and the bottom face sheet are configured to provide structural strength to the aircraft when the antenna is attached to the outer skin thereof.

Claims

1. A conformal load-bearing antenna structure for attachment to an aircraft having an outer skin, the antenna comprising:

a top face sheet;

an end fed radiating element disposed adjacent to the top face sheet;

a dielectric disposed adjacent to the end fed radiating element;

a structural core disposed adjacent to the dielectric;

a bottom face sheet disposed adjacent to the structural core;

an absorber disposed adjacent to the bottom face sheet; and

an absorber pan disposed adjacent to the absorber;

wherein the top face sheet, the dielectric, the structural core, and the bottom face sheet are configured to provide structural strength to the aircraft when the antenna is attached to the outer skin of the aircraft.

2. The antenna structure of claim 1 further comprising a transmission mechanism disposed adjacent to the absorber and in electrical communication with the radiating element.

3. The antenna structure of claim 2 wherein the transmission mechanism comprises a center feed and at least one transmission strip radiating outwardly from the center feed.

4. The antenna structure of claim 3 wherein each of the transmission strips comprises an inner portion connected to the center feed and an outer portion having a contact.

5. The antenna structure of claim 4 wherein each of the contacts is in electrical communication with the radiating element.

6. The antenna structure of claim 5 wherein the radiating element comprises four spirals, each of the spirals in electrical communication with a respective one of the contacts.

7. The antenna structure of claim 1 wherein the top face sheet, the dielectric, the structural core, and the bottom face sheet are bonded together.

8. The antenna structure of claim 1 wherein:

the top face sheet is fabricated from fiberglass;

the dielectric is fabricated from epoxy loaded with titanium dioxide;

the structural core is fabricated from a honeycomb material;

the bottom face sheet is fabricated from fiberglass; and

the absorber is fabricated from a loaded honeycomb material.

9. The antenna structure of claim 8 wherein the absorber pan is fabricated from a graphite material.

10. A method of forming a conformal load-bearing antenna structure for an aircraft from a top face sheet, an end feed radiating element, a dielectric, a structural core, a bottom face sheets, an absorber, and an absorber pan, the method comprising the steps of:

a) bonding the end fed radiating element to the top face sheet;

b) bonding the top face sheet having the radiating element to the dielectric;

c) bonding the structural core to the dielectric;

d) bonding the structural core to the bottom face sheet to form the load bearing antenna structure; and

e) bonding the absorber to the bottom face sheet and bonding the absorber pan to the absorber and the bottom face sheet.

11. The method of claim 10, further comprising the step of:

f) attaching the conformal load-bearing antenna structure to the aircraft such that the antenna structure becomes a structural component of the aircraft.

12. The method of claim 11, wherein step (f) comprises attaching the antenna structure to the skin of the aircraft.

13. The method of claim 10, wherein step (b) comprises bonding the top face sheet to the dielectric such that the radiating element is disposed between the top face sheet and the dielectric.