Orthogonal antenna arrangement and method

• US 6,005,532 A
• Filed: 11/12/1997
• Issued: 12/21/1999
• Est. Priority Date: 04/16/1997
• Status: Expired due to Term

• Current Assignee: Merlin Technologies Incorporated
• Original Assignee: Digital Control Incorporated
• Inventors: Ng, Shiu S.
• Primary Examiner(s): Wong, Don
• Assistant Examiner(s): Clinger, James
• Application Number:
  US08/968,636
• Time in Patent Office: 769 Days
• Field of Search: 343/867, 343/741, 343/742, 343/770, 343/789, 343/896, 343/898, 343/795, 343/797, 343/732, 343/748
• US Class Current: 343/867
• CPC Class Codes: E21B 47/0228 using electromagnetic energy or detectors therefor
• CPC Class Codes: E21B 47/0232 at least one of the energy sources or one of the detectors being located on or above the ground surface
• CPC Class Codes: E21B 47/04 Measuring depth or liquid level
• CPC Class Codes: H01Q 1/04 Adaptation for subterranean or subaqueous use
• 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 21/205 providing an omnidirectional coverage turnstile aerials H01Q21/26
• 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 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

An antenna member, associated orthogonal antenna arrangement and method are disclosed. The antenna member is configured such that an orthogonal antenna arrangement may utilize two or three identical ones of the disclosed antenna member. Accordingly, the antenna member includes a support member defining a through hole which includes a predetermined configuration. Furthermore, an arrangement of conductive members is supported by the support member and surrounds the through hole such that an antenna pattern is defined along an axis which extends through the through hole. The predetermined configuration of the through hole is such that a two orthogonal axis antenna subassembly may be formed by receiving a first one of the antenna members in the predetermined configuration of the through hole of a second one of the antenna members in a way which arranges the axes of the first and second antenna members orthogonally with respect to one another. A three axis orthogonal antenna assembly may be formed by receiving the two orthogonal axis antenna subassembly in the predetermined configuration of the through hole of a third one of the antenna members in a way which positions the axis of the antenna pattern defined by the third antenna member orthogonally with respect to the axes of the antenna patterns defined by the first and second antenna members.

Claims

1. An antenna arrangement comprising:

a) a first planar support member defining a first through hole having a first predetermined configuration, said first planar support member including a first conductive pattern surrounding said first through hole and serving as a first antenna defining a first axis which extends through said first through hole; and

b) a second planar support member including a second conductive pattern serving as a second antenna defining a second axis, said second planar support member being positioned in the first through hole of said first planar support member in a way which arranges the first and second axes orthogonally with respect to one another.

2. The arrangement of claim 1 wherein said first and second support members are substantially planer.

3. The antenna arrangement of claim 1 wherein the first and second axes intersect at a particular point.

4. The antenna assembly of claim 1 wherein said first support member defines a first set of opposing notches as part of the first predetermined configuration and wherein said second support member is configured for slidably engaging said first set of opposing notches.

5. The antenna assembly of claim 4 wherein said second support member includes an opposing pair of outer edges which are configured for slidably engaging said first set of notches.

6. The antenna assembly of claim 5 wherein each one of said opposing pair of outer edges includes means for limiting the slidable engagement of the opposing outer edges with the first set of notches such that said first and second axes of the antennas intersect at a particular point.

7. The antenna assembly of claim 6 wherein said limiting means includes a stop integrally formed as part of each opposing outer edge.

8. The antenna assembly of claim 1 wherein said first and second support members comprise first and second printed circuit boards and wherein said first and second conductive patterns are respectively formed as conductive traces on said first and second printed circuit boards.

9. The antenna member of claim 8 wherein said first and second printed circuit boards each comprise a multi-layered board such that each one of a plurality of layers includes a sub-pattern of said conductive pattern such that each sub-pattern surrounds said through hole and means for electrically interconnecting the sub-patterns of each printed circuit board such that electrical currents induced in the respective sub-patterns by an electromagnetic field are additive.

10. The arrangement of claim 1 further comprising:

c) a third support member defining a second through hole having a second predetermined configuration, said third support member including a third conductive pattern surrounding said second through hole and serving as a third antenna defining a third axis which extends through said second through hole, said first and second support members being positioned in the second through hole of the third support member in a way which arranges said third axis of said third antenna orthogonal to the first and second axes of the first and second antennas.

11. The arrangement of claim 10 wherein said third support member is substantially planer.

12. The antenna arrangement of claim 10 wherein said first, second and third axes intersect at a particular point.

13. The antenna assembly of claim 10 wherein said first, second and third support members are substantially identical.

14. The antenna assembly of claim 10 wherein said third support member defines a first and a second set of opposing notches as part of said second predetermined configuration and wherein said first support member is configured for slidably engaging said first set of opposing notches and said second support member is configured for simultaneously slidably engaging said second set of notches such that the first, second and third support members are positioned in a way which causes the first, second and third axes of the antennas to be orthogonal with respect to one another.

15. The antenna assembly of claim 14 wherein said first, second and third axes of the antennas intersect at a particular point.

16. The antenna assembly of claim 14 wherein said first and second members include first and second outer edge pairs which engage said first and second sets of notches, respectively, and wherein each outer edge pair includes means for limiting the slidable engagement of the first and second antenna members with the third antenna member.

17. The antenna assembly of claim 16 wherein said limiting means includes a stop integrally formed as part of each outer edge pair.

18. The antenna assembly of claim 16 wherein said limiting means is configured such that said first, second and third axes intersect at a particular point.

19. The antenna assembly of claim 10 wherein said first, second and third support members comprise first and second printed circuit boards and wherein said first, second and third conductive patterns are formed as conductive traces on said first, second and third printed circuit boards.

20. The antenna member of claim 19 wherein said first, second and third printed circuit boards each comprise a multi-layered board such that each one of a plurality of layers includes a sub-pattern of said conductive pattern such that each sub-pattern surrounds said through hole and means for electrically interconnecting the sub-patterns of each printed circuit board such that electrical currents induced in the respective sub-patterns by an electromagnetic field are additive.

21. A first antenna member especially suitable for use in an antenna assembly which also includes a second antenna member having a second antenna defining a second axis, said first antenna member comprising:

a) a planar support member defining a specifically configured through hole; and

b) an arrangement of conductive members supported by said planar support member and surrounding said through hole so as to serve as a first antenna defining a first axis which extends through the through hole, the specific configuration of said through hole being such that said second antenna member is able to be received within said through hole in a way which positions the first axis of the antenna defined by the first antenna member orthogonally with respect to the second axis of the second antenna member.

22. The antenna member of claim 21 wherein the first axis of the first antenna of the first antenna member intersects the second axis of the second antenna of the second antenna member at a particular point.

23. The antenna member of claim 21 wherein said support member is substantially planer.

24. The antenna member of claim 23 wherein said support member comprises a printed circuit board and wherein said conductive pattern is formed as conductive traces on said printed circuit board.

25. The antenna member of claim 24 wherein said printed circuit board comprises a multi-layered board including a plurality of layers each of which defines a sub-pattern of said conductive pattern such that each sub-pattern surrounds said through hole and means for electrically interconnecting the sub-patterns such that electrical currents induced in the respective sub-patterns by an electromagnetic field are additive.

26. The antenna member of claim 21 wherein said second antenna member includes a substantially identical support member and wherein each support member defines a first set of opposing notches as part of said predetermined configuration and each support member includes a first pair of outer edges which are configured such that the outer edges of the support member of the second antenna member slidably engage said first set of opposing notches of the support member of the first antenna member.

27. The antenna member of claim 26 wherein each one of said outer edges includes means for limiting the slidable engagement of the edges with the first set of notches such that the first axis of the first antenna member and the second axis of the second antenna member intersect at a particular point.

28. The antenna member of claim 27 wherein said limiting means includes a stop integrally formed as part of each outer edge.

29. A first antenna member especially suitable for use in an antenna assembly which also includes a second antenna member and a third antenna member, said second and third antenna members each including second and third antennas, respectively, defining a second and third axis, said first antenna member comprising:

a) a planar support member defining a specifically configured through hole; and

b) an arrangement of conductive members supported by said planar support member and surrounding said through hole so as to serve as a first antenna defining a first axis which extends through the through hole, the specific configuration of said through hole being such that said second antenna member and said third antenna member are able to be received within said through hole in a way which positions the first axis of the antenna defined by the first antenna member orthogonally with respect to the second axis defined by the second antenna member and the third axis defined by the third antenna member.

30. A method of assembling an antenna assembly comprising the steps of:

a) providing a first antenna including a first planar support member defining a first through hole having a first predetermined configuration, said first planar support member including a first conductive pattern surrounding said first through hole and serving as a first antenna defining a first axis which extends through said first through hole;

b) providing a second antenna member including a second planar support member having a second conductive pattern serving as a second antenna defining a second axis; and

c) positioning said second planar support member in the first through hole of said first planar support member in a way which arranges the first and second axes orthogonally with respect to one another.

31. The method of claim 30 wherein said positioning step arranges said first and second axes to intersect at a particular point.

32. The method of claim 30 further comprising the steps of:

d) providing a third antenna member including a third support member defining a second through hole having a second predetermined configuration, said third support member including a third conductive pattern surrounding said second through hole and serving as a third antenna defining a third axis which extends through said second through hole; and

e) after having positioned the second support member in the through hole of the first support member, arranging said first and second support members in the second through hole of the third support member in a way which causes said third axis of said third antenna to be orthogonal to the first and second axes of the first and second antennas.

33. The method of claim 32 wherein said first, second and third axes intersect at a particular point.