Dual feel multi-band planar antenna

• US 6,670,923 B1
• Filed: 07/24/2002
• Issued: 12/30/2003
• Est. Priority Date: 07/24/2002
• Status: Expired due to Term

• Current Assignee: Laird Connectivity LLC (Laird PLC)
• Original Assignee: Centurion Wireless Technologies Inc (Laird Limited)
• Inventors: Suganthan, Shanmuganathan, Stoiljkovic, Vladimir, Kadambi, Govind Rangaswamy
• Primary Examiner(s): Wong, Don
• Assistant Examiner(s): CHEN, SHIH CHAO
• Application Number:
  US10/201,859
• Time in Patent Office: 524 Days
• Field of Search: 343/700.MS, 343/702, 343/846, 343/847, 343/848, 343/725, 343/729, 343/893, 343/830, 343/767
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 9/0414 in a stacked or folded configuration
• 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

A three-band, two-antenna, assembly includes a planar inverted-F antenna (PIFA) having a radiating/receiving element that is spaced from and extends generally parallel to a ground plane element. The planar radiating/receiving element of an inverted-F antenna (IFA) is located in an open space that exists between the radiating/receiving element of the PIFA and the ground plane element. The radiating/receiving element of the IFA extends either perpendicular to, or parallel to, the radiating/receiving element of the PIFA. The radiating/receiving element of the PIFA includes one or more open slot configurations that operate to provide dual resonant frequencies for the IPFA (AMPS/PCS or GSM/DCS). The radiating/receiving element of the IFA operates in a non-cellular frequency band (ISM or GPS).

Claims

1. A method of making a unitary assembly that contains two antennas, comprising the steps of:

providing a planar inverted-F antenna having a radiating/receiving element that is spaced from and extends generally parallel to a planar ground plane element;

providing an inverted-F antenna having a planar radiating/receiving element; and

locating said radiating/receiving element of said inverted-F antenna in a space that exists between said radiating/receiving element of said planar inverted-F antenna and said planar ground plane element.

2. The method of claim 1 wherein said radiating/receiving element of said inverted-F antenna extends generally perpendicular to said ground plane element and said radiating/receiving element of said planar inverted-F antenna.

3. The method of claim 1 wherein said radiating/receiving element of said inverted-F antenna extends generally parallel to said ground plane element and said radiating/receiving element of said planar inverted-F antenna.

4. A method of making a unitary two-antenna assembly that is responsive to three frequency bands, comprising the steps of:

providing a planar inverted-F antenna having a generally planar radiating/receiving element that is spaced from and extends generally parallel to a generally planar ground plane element;

configuring said radiating/receiving element of said planar inverted-F antenna to be responsive to a first and a second frequency band;

providing an inverted-F antenna having a planar radiating/receiving element;

configuring said radiating/receiving element of said inverted-F antenna to be responsive to a third frequency band; and

locating said radiating/receiving element of said inverted-F antenna in said space between said radiating/receiving element of said planar inverted-F antenna and said ground plane element.

5. The method of claim 4 wherein said radiating/receiving element of said inverted-F antenna extends generally perpendicular to said ground plane element and to said radiating/receiving element of said planar inverted-F antenna.

6. The method of claim 4 wherein said radiating/receiving element of said inverted-F antenna extends generally parallel to said ground plane element and to said radiating/receiving element of said planar inverted-F antenna.

7. The method of claim 4 wherein said radiating/receiving element of said planar inverted-F antenna includes a plurality of spaced-apart slots that operate to provide said response to said first and said second frequency band.

8. The method of claim 7 wherein said radiating/receiving element of said inverted-F antenna extends generally perpendicular to said ground plane element and to said radiating/receiving element of said planar inverted-F antenna.

9. The method of claim 4 wherein said radiating/receiving element of said inverted-F antenna extends generally parallel to said ground plane element and to said radiating/receiving element of said planar inverted-F antenna.

10. The method of claim 4 wherein said first and second frequency bands include AMPS/PCS and GSM/DCS frequency bands, and wherein said third frequency band is a non-cellular frequency band.

11. The method of claim 10 wherein said radiating/receiving element of said inverted-F antenna extends generally perpendicular to said ground plane element and to said radiating/receiving element of said planar inverted-F antenna.

12. The method of claim 10 wherein said radiating/receiving element of said inverted-F antenna extends generally parallel to said ground plane element and to said radiating/receiving element of said planar inverted-F antenna.

13. A unitary two-antenna assembly, comprising:

a generally planar metal ground plane element;

a first generally planar metal radiating/receiving element;

a dielectric member supporting said first radiating/receiving element generally parallel to said ground plane element in a manner to provide an open space between said ground plane element and said first radiating/receiving element;

a first antenna feed conductor connected to said first radiating/receiving element;

said ground plane element, said first radiating/receiving element, and said first antenna feed conductor forming a first antenna;

a second generally planar metal radiating/receiving element associated with said dielectric member in a manner to be located generally within said open space; and

a second antenna feed conductor connected to said second radiating/receiving element;

said ground plane element, said second radiating/receiving element, and said second antenna feed conductor forming a second antenna.

14. The unitary two-antenna assembly of claim 13 wherein said second radiating/receiving element extends generally parallel to said ground plane element and said first radiating/receiving element.

15. The unitary two-antenna assembly of claim 13 wherein said second radiating/receiving element extends generally perpendicular to said ground plane element and said first radiating/receiving element.

16. The unitary two-antenna assembly of claim 13 wherein said first radiating/receiving element includes a radiating edge and a non-radiating edge, and including:

first conductor means electrically connecting a first point on said non-radiating edge to said ground plane element; and

second conductor means electrically connecting said first feed conductor to a second point on said non-radiating edge that is spaced from said first point on said non-radiating edge.

17. The unitary two-antenna assembly of claim 16 including:

an open-slot configuration formed in said first radiating/receiving element causing, said first radiating/receiving element to be responsive to a first and a second frequency band.

18. The unitary two-antenna assembly of claim 17 wherein said open-slot configuration includes a generally L-shaped slot having an open-end that resides on said non-radiating edge at a location that is to one side of both said first and second point on said non-radiating edge.

19. The unitary two-antenna assembly of claim 18 wherein said second radiating/receiving element extends generally parallel to said ground plane element and said first radiating/receiving element.

20. The unitary two-antenna assembly of claim 18 wherein said second radiating/receiving element extends generally perpendicular to said ground plane element and said first radiating/receiving element.

21. The unitary two-antenna assembly of claim 17 wherein said open-slot configuration includes a generally L-shaped slot having an open-end that resides on said non-radiating edge at a location that is between said first and second point on said non-radiating edge.

22. The unitary two-antenna assembly of claim 21 wherein said second radiating/receiving element extends generally parallel to said ground plane element and said first radiating/receiving element.

23. The unitary two-antenna assembly of claim 21 wherein said second radiating/receiving element extends generally perpendicular to said ground plane element and said first radiating/receiving element.

24. The unitary two-antenna assembly of claim 16 including:

an open-slot configuration formed in said first radiating/receiving element causing said first radiating/receiving element to be responsive to a first and a second frequency band, and wherein said second radiating/receiving element is configured to be responsive to a third frequency band.

25. The unitary two-antenna assembly of claim 24 wherein said first and second frequency bands are selected from the group AMPS. PCS, GSM and DCS, and wherein said third frequency band is a non-cellular frequency band.

26. The unitary two-antenna assembly of claim 25 wherein said second radiating/receiving element extends generally parallel to said ground plane element and said first radiating/receiving element.

27. The unitary two-antenna assembly of claim 25 wherein said second radiating/receiving element extends generally perpendicular to said ground plane element and said first radiating/receiving element.

28. The unitary two-antenna assembly of claim 16 including:

third conductor means connecting a point on said second radiating/receiving element to said ground plane element.

29. The unitary two-antenna assembly of claim 28 including:

an open-slot configuration formed in said first radiating/receiving element causing said first radiating/receiving element to be responsive to a first and a second frequency band.

30. The two-antenna assembly of claim 29 wherein said second radiating/receiving element is configured to be responsive to a third frequency band.

31. The unitary two-antenna assembly of claim 30 wherein said second radiating/receiving element extends generally parallel to said ground plane element and said first radiating/receiving element.

32. The unitary two-antenna assembly of claim 30 wherein said second radiating/receiving element extends generally perpendicular to said ground plane element and said first radiating/receiving element.

33. A unitary two-antenna assembly, comprising:

a ground plane element;

a first radiating/receiving element;

dielectric means supporting said first radiating/receiving element relative to said ground plane element in a manner to provide an open space between said ground plane element and said first radiating/receiving element;

first feed means connected to said first radiating/receiving element;

first conductor means connecting a point on said first radiating/receiving element to said ground plane element;

said ground plane element, said first radiating/receiving element, said first feed means, and said first conductor means forming a planar inverted-F antenna;

a second radiating/receiving element supported by said dielectric means generally within said open space;

second feed means connected to said second radiating/receiving element; and

second conductor means connecting a point on said second radiating/receiving element to said ground plane element;

said ground plane element, said second radiating/receiving element, said second feed means, and said second conductor means forming an inverted-F antenna.

34. The unitary two-antenna assembly of claim 33 wherein said first radiating/receiving element includes a radiating edge and a non-radiating edge, wherein said first feed means connects to a first point on said non-radiating edge, and wherein said first conductor means connects to a second point on said non-radiating edge.

35. The unitary two-antenna assembly of claim 34 including:

at least one open-slot configuration formed in said first radiating/receiving element causing said first radiating/receiving element to be responsive to a first and a second frequency band, and wherein said second radiating/receiving element is responsive to a third frequency band.

36. The unitary two-antenna assembly of claim 35 wherein said at least one open-slot configuration includes a generally L-shaped slot having an open-end that resides on said non-radiating edge at a location that is to one side of both said first and second point on said non-radiating edge.

37. The unitary two-antenna assembly of claim 35 wherein said at least one open-slot configuration includes a generally L-shaped slot having an open-end that resides on said non-radiating edge at a location that is between said first and second point on said non-radiating edge.

38. The unitary two-antenna assembly of claim 35 wherein said first and second frequency bands are selected from the group AMPS, PCS, GSM and DCS, and wherein said third frequency band is a non-cellular frequency band.

39. The unitary two-antenna assembly of claim 35 wherein said second radiating/receiving element extends generally parallel to said ground plane element and said first radiating/receiving element.

40. The unitary two-antenna assembly of claim 35 wherein said second radiating/receiving element extends generally perpendicular to said ground plane element and said first radiating/receiving element.