ANTENNA SYSTEM FOR A COMMUNICATION DEVICE

• US 20050001773A1
• Filed: 07/03/2003
• Published: 01/06/2005
• Est. Priority Date: 07/03/2003
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Asrani, Vijay L., Jalali, Amin T., Morningstar, Paul
• Granted Patent: US 6,861,989 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas

Abstract

An antenna system (300) for a communication device (100) includes an auxiliary antenna (140) and a printed circuit board (130). The auxiliary antenna (140) is located within a movable flip housing (110) of the communication device (100). The auxiliary antenna (140) has a structure comprising an electromagnetic radiator and a coupling probe (315). The printed circuit board (130) is located within a main housing (105) of the communication device (100). The coupling probe (315) couples the auxiliary antenna (140) to the printed circuit board (130).

Claims

1. An antenna system for a communication device, the antenna system comprising:

an auxiliary antenna within a movable flip housing of the communication device, wherein the auxiliary antenna has a structure comprising an electromagnetic radiator and a coupling probe; and

a printed circuit board within a main housing of the communication device, wherein the coupling probe couples the auxiliary antenna to the printed circuit board.

2. An antenna system as recited in claim 1 further comprising:

an antenna coupled to the printed circuit board.

3. An antenna system as recited in claim 1 wherein the auxiliary antenna includes a slot to create the coupling probe.

4. An antenna system as recited in claim 1 wherein the auxiliary antenna comprises an electromagnetically excited radiator created by proximately coupling the coupling probe to the printed circuit board.

5. An antenna system as recited in claim 1 wherein the coupling probe of the auxiliary antenna includes one or more probe dimensions that are used to determine a desired coefficient of coupling between one or more currents within the printed circuit board and the auxiliary antenna, and further wherein the one or more probe dimensions are chosen from a group consisting of a probe width, a probe diameter, a probe length, a probe spacing and an overlap.

6. An antenna system as recited in claim 1 wherein one or more probe currents are present within the coupling probe, and further wherein the one or more probe currents radiate in response to the coupling between the coupling probe and the printed circuit board.

7. An antenna system as recited in claim 1 wherein one or more currents are present within the printed circuit board, and further wherein the one or more currents radiate in response to the coupling between the coupling probe and the printed circuit board.

8. An antenna system as recited in claim 1 wherein the coupling probe and the printed circuit board together comprise a pair of coupled lines.

9. An antenna system as recited in claim 1, wherein the movable flip housing rotates with respect to the main housing causing a relative position of the coupling probe and the printed circuit board to vary, and further wherein a coefficient of coupling between the coupling probe and the printed circuit board varies in response to the varying relative position.

10. An antenna system as recited in claim 9 wherein a radiation efficiency of the antenna system varies in response to the varying coefficient of coupling.

11. An antenna system as recited in claim 1, wherein the auxiliary antenna is an antenna selected from a group consisting of an upward slotted auxiliary antenna, a downward slotted auxiliary antenna, and an impedance coupling auxiliary antenna.

12. An antenna system as recited in claim 1, wherein the printed circuit board is a printed circuit board selected from a group consisting of a main printed circuit board, a downward slotted main printed circuit board, and an upward slotted main printed circuit board.

13. An antenna system for a communication device, the antenna system comprising:

an antenna;

a printed circuit board coupled to the antenna, wherein the printed circuit board is contained within a main housing of the communication device;

a first portion auxiliary antenna contained within a movable flip housing of the communication device; and

a second portion auxiliary antenna coupled between the printed circuit board and the first portion auxiliary antenna.

14. An antenna system as recited in claim 13 wherein the second portion auxiliary antenna is contained within a hinge assembly of the communication device, wherein the hinge assembly couples together the movable flip housing and the main housing.

15. An antenna system as recited in claim 13 wherein the second portion auxiliary antenna includes at least one slot between a first conductive element and a second conductive element to form one or more conductive probes.

16. An antenna system as recited in claim 15 wherein the first conductive element and a first coupling probe form a first coupling between the first auxiliary antenna portion and the second auxiliary antenna portion.

17. An antenna system as recited in claim 15, wherein the second conductive element and the printed circuit board form a second coupling between the second auxiliary antenna portion and the printed circuit board.

18. An antenna system for use within a communication device having a front housing, a rear housing, and a rotating hinge assembly coupled between the front housing and the rear housing, the antenna system comprising:

an electromagnetic radiator and a coupling probe constructed by adhering metallization onto one or more plastic portions of the rotating hinge assembly.

19. An antenna system as recited in claim 18 further comprising:

a metal display shield constructed within the front housing; and

a connection path between the coupling probe and the metal display shield, wherein the connection path is selected from a group consisting of a direct contact in which there is a DC (direct current), an RF connection, and an alternate current radio frequency connection.

20. An antenna system for use within a communication device having a front housing, a rear housing, and a rotating hinge assembly coupled between the front housing and the rear housing, the antenna system comprising:

an electromagnetic radiator and coupling probe constructed by adhering metallization onto a non metallic decorative lens;

wherein the non metallic decorative lens is coupled to the rotating hinge assembly.