DIRECTIVE ANTENNA WITH ISOLATION FEATURE

• US 20130069837A1
• Filed: 06/09/2011
• Published: 03/21/2013
• Est. Priority Date: 06/09/2010
• Status: Abandoned Application

• Current Assignee: Galtronics Corporation Limited (Baylin Technologies (USA), Inc.)
• Original Assignee: Galtronics Corporation Limited (Baylin Technologies (USA), Inc.)
• Inventors: Cozzolino, Randell, Chair, Ricky
• Application Number:
  US13/699,384
• Publication Number:
  US 20130069837A1
• Time in Patent Office: Days
• US Class Current: 343/727
• CPC Class Codes: H01Q 1/243 with built-in antennas
• 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 1/50 Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 19/24 the primary active element being centre-fed and substantially straight, e.g. H-antenna
• CPC Class Codes: H01Q 19/30 the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 5/50 Feeding or matching arrangements for broad-band or multi-band operation
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407

Abstract

An antenna including a reflector formed by a ground plane, the ground plane having a notch therein, at least one parasitic director offset from the ground plane and a driven element formed by a dipole antenna coupled to the ground plane in proximity to the notch and located between the at least one parasitic director and an edge of the ground plane.

Claims

1-24. -24. (canceled)

25. An antenna comprising:

a reflector formed by a ground plane, said ground plane having a notch therein, said notch being adapted to operate as a coupled slot antenna and thereby to choke off surface currents on said ground plane; and

a driven element formed by a dipole antenna coupled to said ground plane in proximity to said notch.

26. An antenna according to claim 25, and also comprising at least one parasitic director offset from said ground plane, said notch being located between said at least one parasitic director and an edge of said ground plane.

27. An antenna according to claim 25, wherein said notch is generally parallel to said dipole and rearwardly offset therefrom in a direction towards said edge of said ground plane.

28. An antenna according to claim 25, wherein said notch has a length between a quarter and a half of an operating wavelength of said dipole.

29. An antenna according to claim 25, wherein said ground plane comprises a printed circuit board (PCB) ground plane.

30. An antenna according to claim 25, wherein said ground plane, said at least one director and said dipole are supported by a dielectric surface.

31. An antenna according to claim 25, wherein said ground plane and said director are planar.

32. An antenna according to claim 31, wherein said dipole is planar.

33. An antenna according to claim 31, wherein said dipole is non-planar.

34. An antenna according to claim 25, and also comprising a balun formed integrally with said dipole.

35. An antenna according to claim 25, wherein said dipole comprises a first dipole arm and a second dipole arm.

36. An antenna according to claim 35, wherein said dipole is fed by a feedline.

37. An antenna according to claim 36, wherein said feedline comprises a transmission line.

38. An antenna according to claim 37, wherein said transmission line comprises a printed transmission line.

39. An antenna according to claim 37, wherein said first dipole arm is galvanically connected to said transmission line and said second dipole arm is galvanically connected to said ground plane.

40. An antenna according to claim 36, wherein said feedline comprises a coaxial cable comprising an inner conductor and an outer conductor.

41. An antenna according to claim 40, wherein said first dipole arm is galvanically connected to said inner conductor and said second dipole arm is galvanically connected to said ground plane.

42. An antenna according to claim 40, wherein said outer conductor is galvanically connected to said ground plane.

43. An antenna according to claim 25, wherein said at least one director is galvanically connected to said dipole to form a unitary structure.

44. An antenna according to claim 43, wherein said antenna comprises a single metallic sheet.

45. An antenna according to claim 25, wherein said at least one director comprises at least one conductive strip.

46. An antenna according to claim 25, wherein a peak gain of said antenna is equal to at least about 5 dBi.

47. A multiple antenna assembly comprising at least two of said antennas of claim 25, wherein said ground plane comprises a common ground plane of said at least two antennas.

48. A multiple antenna assembly according to claim 47, wherein an isolation between said at least two antennas is better than about −

35 dB.