Antenna Configurations for Compact Device Wireless Communication

• US 20090121948A1
• Filed: 09/03/2008
• Published: 05/14/2009
• Est. Priority Date: 09/04/2007
• Status: Active Grant

• Current Assignee: NETGEAR, Inc.
• Original Assignee: Sierra Wireless Incorporated
• Inventors: Nysen, Paul A.
• Granted Patent: US 7,952,528 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/2275 associated to expansion card or bus, e.g. in PCMCIA, PC cards, Wireless USB
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 19/12 wherein the surfaces are concave H01Q19/18 takes precedence
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 5/364 Creating multiple current paths
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407
• CPC Class Codes: H01Q 9/36 with top loading

Abstract

A duplex antenna system includes first and second antenna portions that are at least partially separated by a gap, a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion, and a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion.

Claims

1. A duplex antenna system comprising:

first and second antenna portions that are at least partially separated by a gap;

a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion; and

a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion.

2. The antenna system of claim 1, wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of a short circuit coupling.

3. The antenna system of claim 1, wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of an open circuit coupling.

4. The antenna system of claim 3, wherein the first and second feed lines are joined together.

5. The antenna system of claim 1, further comprising at least one of a shunt or series match element coupled to at least one of the first or second feed lines.

6. The antenna system of claim 5, wherein at least one of the match elements comprises parallel-connected capacitive and inductive elements.

7. The antenna system of claim 5, wherein the shunt and series match elements are disposed within an integer multiple of a half wavelength distance of a wavelength to which the antenna is tuned from a coupling point.

8. The antenna system of claim 1, further comprising a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.

9. A wireless communication device configured to provide wireless communication to a host device when disposed in a mated position with the host device, the wireless communication device comprising:

a transceiver;

a controller in communication with the transceiver;

a modem in communication with the controller; and

a duplex antenna system for providing dual-band operation to the wireless communication system, the duplex antenna system including;

first and second antenna portions that are at least partially separated by a gap;

a first feed line coupled to the first antenna portion, the first feed line being overlapped by the gap and the second antenna portion; and

a second feed line coupled to the second antenna portion, the second feed line being overlapped by the gap and the first antenna portion.

10. The antenna system of claim 9, wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of a short circuit coupling.

11. The antenna system of claim 9, wherein the first and second feed lines are respectively coupled to the first and second antenna portions by way of an open circuit coupling.

12. The antenna system of claim 11, wherein the first and second feed lines are joined together.

13. The antenna system of claim 9, further comprising at least one of a shunt or series match element coupled to at least one of the first or second feed lines.

14. The antenna system of claim 13, wherein at least one of the match elements comprises parallel-connected capacitive and inductive elements.

15. The antenna system of claim 13, wherein the shunt and series match elements are disposed within an integer multiple of a half wavelength distance of a wavelength to which the antenna is tuned from a coupling point.

16. The antenna system of claim 9, further comprising a balun feed in which the first portion is associated with a high band signal and the second portion is associated with a low band signal.