Antenna structures

• US 6,486,837 B2
• Filed: 04/09/2001
• Issued: 11/26/2002
• Est. Priority Date: 04/09/2001
• Status: Expired due to Fees

• Current Assignee: Molex Incorporated (KOCH Industries Incorporated)
• Original Assignee: Molex Incorporated (KOCH Industries Incorporated)
• Inventors: Darden, William H. IV, Spiegel, Marko
• Primary Examiner(s): Ho, Tan
• Application Number:
  US09/829,027
• Publication Number:
  US 20020145567A1
• Time in Patent Office: 596 Days
• Field of Search: 343/702, 343/700.MS, 343/767, 343/770, 455/89, 455/90, 296/00
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 5/357 using a single feed point
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence

Abstract

An antenna structure and assembly are provided, along with a method of fabricating the same. The antenna structure is formed by molding a plateable plastic antenna element in the desired shape of the antenna structure. The molded antenna element is plated substantially entirely thereabout with a conductive metal material. The antenna assembly includes the molded and plated antenna structure attached to a dielectric base structure adapted for mounting on an appropriate support such as a printed circuit board. A contact spring clip is interengaged between the antenna structure and the circuit board.

Claims

1. An antenna assembly, comprising:

a dielectric base for mounting on a circuit board;

a plateable plastic antenna radiating element and a conductive metal plating covering the plateable plastic antenna radiating element; and

complementary interengaging attachment means between the base and said radiating element.

2. The antenna assembly of claim 1 wherein the said radiating element is substantially planar in configuration.

3. The antenna assembly of claim 1 wherein said complementary interengaging attachment means include at least one attachment post on the base press-fit into an attachment hole in the radiating element.

4. The antenna assembly of claim 1 wherein said base is molded from a plastic material, and said complementary interengaging attachment means include portions of the base overmolded about portions of the radiating element.

5. The antenna assembly of claim 1 wherein said base includes a conductive contact clip for contacting the circuit board.

6. The antenna assembly of claim 5 wherein said conductive contact clip includes a metal spring clip.

7. The antenna assembly of claim 5 wherein said radiating element includes an arm extending therefrom over the base toward the circuit board, said contact clip being located generally at a distal end of the arm.

8. The antenna assembly of claim 1 including a conductive contact clip in contact with a plated portion of the antenna element.

9. An inexpensive antenna radiating element, comprising:

a planar body portion formed from a plastic that is plateable with metal;

a conductive metal layer plated to said body portion, the metal layer being plated to at least opposing top and bottom surfaces of said body portion and said metal layer further being plated to at least one interconnecting surface of said body portion that extends between said body portion top and bottom surfaces to electrically interconnect said body portion top and bottom surfaces; and

at least one arm member extending from said body portion for connecting said body portion to a circuit board, at least a portion of said arm member being plated with said metal layer to electrically interconnect said radiating element to the circuit board.

10. The antenna radiating element of claim 9, wherein said body portion includes a slot extending therein which permits said radiating element to operate in two different band widths when energized.

11. The antenna radiating element of claim 10, wherein said slot has two different segments that extend at an angle to each other.

12. The antenna radiating element of claim 9, wherein all surfaces of said body portion are plated with said metal layer.

13. An antenna structure for use in a portable wireless telecommunication device, the telecommunication device having an exterior housing and a circuit substrate, the circuit substrate having electrical circuitry and components to operate the telecommunication device, the antenna structure comprising:

a single shot plateable plastic antenna element configured in the desired shape of the antenna structure; and

a conductive metal plating substantially entirely covering the plateable plastic antenna element, wherein the antenna element is adapted for mounting on an internal surface of the telecommunication device external housing.

14. The antenna structure of claim 13 wherein the antenna element is attached to a dielectric base structure adapted for mounting on the circuit substrate.

15. The antenna structure of claim 13 including a conductive contact clip interengaged between the antenna structure and the circuit substrate.

16. The antenna structure of claim 13 wherein the plateable plastic antenna element is substantially planar in configuration.

17. A method of fabricating an antenna structure, comprising the steps of:

molding a plateable plastic antenna element in the desired shape of the antenna structure by a single shot molding method; and

plating the molded antenna element substantially entirely thereabout with a conductive metal material, wherein the antenna element is substantially planar.

18. The method of claim 17 wherein said plating step is carried out by an electro-plating process.

19. The method of claim 17, including the step of attaching the antenna structure to a dielectric base structure.

20. The method of claim 19 wherein said base structure is molded of plastic material with portions thereof overmolded about portions of the antenna structure to attach the antenna structure to the base structure.

21. The method of claim 17, including molding a plurality of said plateable plastic antenna elements in a multi-antenna element array joined by an integrally molded carrier structure, and subsequently severing the antenna elements from the carrier structure.

22. The method of claim 21 wherein said antenna elements are plated prior to being severed from the carrier structure.