Antenna assembly for a portable communications device

• US 5,894,292 A
• Filed: 12/09/1996
• Issued: 04/13/1999
• Est. Priority Date: 12/09/1996
• Status: Expired due to Term

• Current Assignee: Quarterhill Inc. (f/k/a Wi-LAN Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Marron, Alex, Hosseini, Sam, Everest, III, David Clark, Tyneski, Frank M.
• Primary Examiner(s): Gross, Anita Pellman
• Assistant Examiner(s): St. Cyr, Daniel
• Application Number:
  US08/762,088
• Time in Patent Office: 855 Days
• Field of Search: 343/702, 343/895, 336/749, 336/192, 336/185
• US Class Current: 343/895
• CPC Class Codes: H01Q 1/1207 for fastening a rigid aerial element
• CPC Class Codes: H01Q 1/242 specially adapted for hand-held use
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas

Abstract

An antenna assembly (100) includes a substrate (101) having a notched portion (103) and one or more attachment apertures (105). An antenna (107) includes a conductive coil (109) that is inserted within the slotted portion of the substrate (101) such that a loop of the conductive coil (109) is fastened within the attachment aperture (105) for holding the antenna (107) into a fixed position. The antenna assembly (100) for a low cost and easy method of assembly that rigidly attaches an antenna to a substrate without the need for additional mechanical fasteners.

Claims

1. An antenna assembly comprising:

a substrate having a slotted portion and at least one attachment aperture;

an antenna comprised of a conductive coil having a plurality of loops; and

wherein the slotted portion of the substrate has at least one open end that is open to an edge of the substrate and is inserted within the conductive coil such that at least one loop of the plurality of loops is fastened within the at least one attachment aperture for holding the antenna into a fixed position.

2. An antenna assembly as in claim 1 wherein the substrate includes at least one conductive trace for making an electrical connection with the conductive coil.

3. An antenna assembly as in claim 1 wherein the conductive coil is a wire having a uniform pitch and wire diameter.

4. An antenna assembly as in claim 1 wherein the slotted portion is enclosed within the substrate.

5. An antenna assembly used in a portable two-way radio comprising:

an antenna element forming a helical coil;

a printed circuit board having at least one slotted section and at least one aperture where the at least one slotted section is open to an edge of the printed circuit board; and

wherein an end of the helical coil is inserted into the at least one slotted section and rotated for engaging the end of the helical coil with the at least one aperture and holding the antenna element into a fixed position.

6. An antenna assembly as in claim 5 wherein the helical coil is made of a conductive material.

7. An antenna assembly as in claim 5 wherein the printed circuit board includes at least one metal trace for electrically connecting with the helical coil.

8. An antenna assembly for use in a portable communications device comprising:

a substrate having a plurality of slotted sections open to an edge of the substrate and at least one engagement section formed within one of the plurality of slotted sections;

an antenna element including a helical coil having a plurality of loops; and

wherein at least one of the plurality of loops is positioned into at least one of the plurality of slotted sections and engages with the at least one engagement section for fixedly attaching the antenna element with the substrate.

9. An antenna assembly as in claim 8 wherein the substrate includes a plurality of metal traces for connection to the helical coil.

10. An antenna assembly as in claim 8 wherein the helical coil has a uniform pitch and wire diameter.

11. A method of attaching an antenna to a substrate having at least one slotted section open to an edge of the substrate and at least one aperture for use in a portable communications device comprising the steps of:

positioning an antenna element having a helical coil into the at least one slotted section located on the substrate; and

rotating the helical coil so that an end of the helical coil is disposed within the at least one aperture for engaging the helical coil with the substrate and holding the antenna element into a fixed position.

12. A method as in claim 11 wherein the at least one slotted section is enclosed within the substrate.