IP Library Granted Patent US 7,187,335
Granted Patent B2
US 7,187,335 · App. 11/139,284 · Granted Mar 6, 2007

System and method for providing a distributed loaded monopole antenna

Assignee: The Board of Governors for Higher Education, State of Rhode Island and Providence Plantations
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Quick Facts
Patent No.
US 7,187,335
App. No.
11/139,284
Granted
Mar 6, 2007
Kind
B2
Abstract

A distributed loaded antenna system including a monopole antenna is disclosed. The antenna system includes a radiation resistance unit coupled to a transmitter base, a current enhancing unit for enhancing current through the radiation resistance unit, and a conductive mid-section intermediate the radiation resistance unit and the current enhancing unit. The conductive mid-section has a length that provides that a sufficient average current is provided over the length of the antenna.

Claims (42)

1. A distributed loaded antenna system including a monopole antenna comprising:

a radiation resistance unit coupled to a transmitter base, said radiation resistant unit including a radiation resistance unit base that is coupled to ground;

a current enhancing unit for enhancing current through said radiation resistance unit; and

a conductive mid-section intermediate said radiation resistance unit and said current enhancing unit, said conductive mid-section having a length of about 0.025 λ where λ is the wavelength of the signal to be radiated by the antenna system.

2. The distributed loaded antenna system as claimed in claim 1 , wherein said radiation resistance unit includes a helix.

3. The distributed loaded antenna system as claimed in claim 1 wherein said radiation resistance unit includes a planar spiral coil winding.

4. The distributed loaded antenna system as claimed in claim 1 , wherein said current enhancing unit includes a load coil.

5. The distributed loaded antenna system as claimed in claim 1 , wherein said current enhancing unit includes a planar spiral coil winding.

6. The distributed loaded antenna system as claimed in claim 1 , wherein said current enhancing unit includes a top unit.

7. The distributed loaded antenna system as claimed in claim 6 , wherein said top unit includes a conductive hub and spoke structure.

8. The distributed loaded antenna system as claimed in claim 6 , wherein said top unit includes a planar spiral coil winding.

9. The distributed loaded antenna system as claimed in claim 1 , wherein said antenna is printed in a printed circuit board.

10. The distributed loaded antenna system as claimed in claim 1 , wherein said antenna includes an adjustment unit for adjusting either the radiation resistance unit or the current enhancing unit.

11. The distributed loaded antenna system as claimed as claim 10 , wherein said adjustment unit includes a slotted tube.

12. The distributed loaded antenna system as claimed in claim 11 , wherein said adjustment unit further includes a tapered sleeve.

13. The distributed loaded antenna system as claimed in claim 1 , wherein said radiation resistance unit has a first inductance and said current enhancing unit has a second inductance that is greater than said first inductance.

14. The distributed loaded antenna system as claimed in claim 13 , wherein a ratio of said second inductance to said first inductance is in the range of about 1.1 to about 2.0.

15. The distributed loaded antenna system as claimed in claim 13 , wherein a ratio of said second inductance to said first inductance is in the range of about 1.4 to about 1.7.

16. The distributed loaded antenna system as claimed in claim 1 , wherein said antenna further includes a false winding that is electrically decoupled from the antenna at each end therefore, and is positioned within the radiation resistance unit between alternating windings of a conductor coil in said radiation resistance unit.

17. The distributed loaded antenna system as claimed in claim 1 , wherein said transmitter base includes a coupling to ground, and a base of said radiation resistance unit is connected to ground.

18. A distributed loaded antenna system including a monopole antenna comprising:

a radiation resistance unit coupled to a transmitter base;

a current enhancing unit for enhancing current through said radiation resistance unit; and

a conductive mid-section intermediate said radiation resistance unit and said current enhancing unit, said radiation resistance unit having a first inductance and said current enhancing unit has a second inductance that is greater than said first inductance.

19. The distributed loaded antenna system as claimed in claim 18 , wherein a ratio of said second inductance to said first inductance is in the range of about 1.1 to about 2.0.

20. The distributed loaded antenna system as claimed in claim 18 , wherein a ratio of said second inductance to said first inductance is in the range of about 1.4 to about 1.

21. A distributed loaded antenna system including a monopole antenna comprising:

a radiation resistance unit coupled to a transmitter base;

a current enhancing unit for enhancing current through said radiation resistance unit; and

a conductive mid-section intermediate said radiation resistance unit and said current enhancing unit, wherein said radiation resistance unit is formed of a planospiral conductor material.

22. The distributed loaded antenna system as claimed in claim 21 , wherein said planospiral conductor material is generally rectangularly shaped.

23. The distributed loaded antenna system as claimed in claim 21 , wherein said planospiral conductor material is generally circularly shaped.

24. A distributed loaded antenna system including a monopole antenna comprising:

a radiation resistance unit coupled to a grounded transmitter base;

a signal input tab coupled to said radiation resistance unit;

a current enhancing unit for enhancing current through said radiation resistance unit; and

a conductive mid-section intermediate said radiation resistance unit and said current enhancing unit.

25. The distributed loaded antenna system as claimed in claim 24 , wherein said radiation resistance unit includes a helix.

26. The distributed loaded antenna system as claimed in claim 24 , wherein said current enhancing unit includes a load coil.

27. The distributed loaded antenna system as claimed in claim 24 , wherein said current enhancing unit includes a top unit having a hub and spoke structure.

28. The distributed loaded antenna system as claimed in claim 24 , wherein said antenna includes an adjustment unit for adjusting either the radiation resistance unit or the current enhancing unit.

29. The distributed loaded antenna system as claimed in claim 24 , wherein said radiation resistance unit has a first inductance and said current enhancing unit has a second inductance that is greater than said first inductance.

Assignments (4)
CHANGE OF NAME Recorded Jun 27, 2017
From: VINCENT, ROBERT J.
To: COUNCIL ON POSTSECONDARY EDUCATION
Reel/Frame 042823/0452 →
CHANGE OF NAME Recorded May 15, 2015
From: VINCENT, ROBERT J.
To: RHODE ISLAND BOARD OF EDUCATION, STATE OF RHODE ISLAND AND PROVIDENCE PLANTATIONS
Reel/Frame 035650/0356 →
CORRECTIVE ASSIGNMENT TO CORRECT THE SERIAL NO. /PATENT NO. INSIDE THE ASSIGNMENT DOCUMENT PREVIOUSLY RECORDED AT REEL: 017093 FRAME: 0845. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Dec 9, 2014
From: VINCENT, ROBERT J
To: RHODE ISLAND BOARD OF EDUCATION, STATE OF RHODE ISLAND AND PROVIDENCE PLANTATIONS
Reel/Frame 034680/0757 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 14, 2005
From: VINCENT, ROBERT J.
To: BOARD OF GOVERNORS FOR HIGHER EDUCATION STATE OF RHODE ISLAND AND PROVIDENCE PLANTATIONS, THE
Reel/Frame 017093/0845 →
Continuity (5)
Continuation PCTUS200402055600 · Jun 25, 2004
Provisional Application 6057684700 · Jun 3, 2004
Provisional Application 6049808900 · Aug 27, 2003
Provisional Application 6048242100 · Jun 25, 2003
Related Publication 20060022883A1 · Feb 2, 2006