Deposited three-dimensional antenna apparatus and methods

• US 10,020,561 B2
• Filed: 09/19/2014
• Issued: 07/10/2018
• Est. Priority Date: 09/19/2013
• Status: Active Grant

• Current Assignee: Pulse Finland Oy (Yageo Corporation)
• Original Assignee: Pulse Finland Oy (Yageo Corporation)
• Inventors: Kalistaja, Esa, Lambacka, Riku, Annamaa, Petteri
• Primary Examiner(s): Smith, Graham
• Assistant Examiner(s): Maldonado, Noel
• Application Number:
  US14/491,684
• Publication Number:
  US 20150138024A1
• Time in Patent Office: 1,390 Days
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• 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 5/371 Branching current paths
• CPC Class Codes: H01Q 5/385 Two or more parasitic elements
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
• CPC Class Codes: Y10T 29/49018 with other electrical component

Abstract

A “thin” and cost-effective three-dimensional antenna assembly and methods of use and manufacturing thereof. In one exemplary embodiment, the solution of the present disclosure is particularly adapted for small form-factor portable radio devices, and comprises an antenna (or array of antennas) deposited on a thin preformed flexible or deformable structure using a conductive fluid. The antenna (array) includes one or more antennas each having a radiator and a plurality of contacts. Use of the thin preformed structure allows, among other things, thinner form factors for the host wireless device, and obviates use of a separate molded carrier or other more costly or involved processes (such as laser direct structuring).

Claims

1. An antenna assembly for use in a mobile device, comprising:

a thin flexible antenna structure comprising a radiator and a plurality of contacts, wherein the radiator and the plurality of contacts are deposited onto the thin flexible antenna structure using a flowable conductive fluid; and

a housing portion for the mobile device;

wherein;

the thin flexible antenna structure and the housing portion are bonded to one another, and the thin flexible antenna structure comprises a textured surface;

the thin flexible structure comprises a three-dimensional shape configured to couple to an external surface of the housing portion of the mobile device; and

the radiator and the plurality of contacts are disposed on an inner surface of the thin flexible structure and also disposed on the external surface of the housing portion of the mobile device.

2. The antenna assembly of claim 1, wherein the thin flexible antenna structure is bonded to the housing portion via an adhesive.

3. The antenna assembly of claim 1, wherein the thin flexible antenna structure is insert-molded with the housing portion.

4. The antenna assembly of claim 1, wherein the thin flexible structure permits the antenna assembly to conform to one or more three-dimensional features present on the housing portion of the mobile device.

5. The antenna assembly of claim 4, wherein the conformance of the antenna assembly to the three-dimensional features comprises at least one angular bend in the thin flexible antenna structure corresponding to at least one internal feature of the housing portion of the mobile device.

6. The antenna assembly of claim 4, wherein the thin flexible antenna structure comprises a translucent structure that is painted.

7. The antenna assembly of claim 4, wherein the thin flexible antenna structure further comprises a second radiator disposed thereon;

and

wherein the radiator disposed on the inner surface of the thin flexible substrate and the second radiator disposed on an outer surface of the thin flexible structure are connected through via holes.

8. The antenna assembly of claim 7, wherein the thin flexible antenna structure is bonded to the housing portion via an adhesive.

9. The antenna assembly of claim 7, wherein the thin flexible antenna structure is insert-molded with the housing portion.

10. A method of manufacturing an antenna assembly for use with a mobile device, the method comprising:

obtaining a thin flexible polymer structure;

texturing the thin flexible polymer structure;

forming the thin flexible polymer structure into a three-dimensional form, the three-dimensional shape being configured to couple to an external surface of a housing of the mobile device;

disposing a first antenna radiator and a plurality of contacts on an inner surface of the textured thin flexible polymer structure using a deposition process so as to form an antenna for use with at least one wireless interface of the mobile device; and

bonding the antenna with a housing portion associated with the mobile device such that the first antenna radiator and the plurality of contacts are also disposed on the external surface of the housing.

11. The method of claim 10, further comprising:

forming the thin flexible polymer structure into the three dimensional form prior to the disposing of the first antenna radiator.

12. The method of claim 11, further comprising:

painting the thin flexible polymer structure prior to the disposing of the first antenna radiator.

13. The method of claim 12, further comprising painting the thin flexible polymer prior to the forming of the thin flexible polymer structure into the three dimensional form.

14. The method of claim 11, further comprising texturing the thin flexible polymer structure prior to the forming of the thin flexible polymer structure into the three dimensional form.

15. A wireless mobile device, comprising:

a housing;

at least one wireless transceiver; and

an antenna assembly in signal communication with the at least one wireless transceiver, the antenna assembly comprising;

a thin flexible structure comprising a textured surface, the thin flexible structure having an antenna comprising an antenna radiator and a plurality of contacts, the antenna radiator and the plurality of contacts being deposited onto the thin flexible structure using a flowable conductive fluid;

wherein;

the thin flexible structure is bonded to the housing;

the thin flexible structure comprises a three-dimensional shape configured to couple to an external surface of the housing; and

the antenna radiator and the plurality of contacts are disposed on an inner surface of the thin flexible structure and also disposed on the external surface of the housing.

16. The wireless mobile device of claim 15, wherein the thin flexible structure permits the antenna assembly to conform to one or more three-dimensional features present on the housing of the wireless mobile device.

17. The wireless mobile device of claim 16, wherein one or more of the plurality of contacts comprise conductive via holes configured to permit electrical connection to another thin flexible structure.

18. The wireless mobile device of claim 17, wherein the thin flexible structure is bonded to the housing via an adhesive.

19. The wireless mobile device of claim 17, wherein the thin flexible structure is insert-molded with at least a portion of the housing.

20. The wireless mobile device of claim 15, wherein another radiator pattern is disposed on an outer surface of the thin flexible structure, and the plurality of contacts comprise conductive via holes configured to connect the radiator and the other radiator pattern.