US5367312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biconical dipole antenna
Assignee: Antenna Research Associates Inc
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Filing: 1992-03-20
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Granted: 1994-11-22
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Expires: 2012-03-20
Abstract
Abstract A biconical antenna is used to measure the intensity of incident RF electrical fields. The antenna comprises a pair of aligned rods with wires distributed around the rods to define conical cavities around each of the rods. A ferrite choke surrounds each of the rods within the conical cavities to choke off residence within the cavities.
Inventors
- 👤 R. Wayne Masters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:08
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
193 words
In a biconical dipole antenna comprising a pair of electrically conducting support rods, each having a proximal and a distal end, a plurality of electrically conducting wires distributed around each end of each of said support rods, each wire having one end electrically connected to the distal end of the corresponding support rod and a second end electrically connected to the corresponding support rod at a location between said distal end and the proximal end of the rod, said wires being spaced uniformly around the corresponding support rod to define a conical cavity around each rod, and means for mounting said rods and wires in a dipole configuration, said dipole configuration producing an output voltage in response to incident radiation and being susceptible to resonance induced within each of said conical cavities by detected incident radiation and causing a sharp peak in the curve representing the variation with frequency of the ratio of the intensity of the incident electric field to output voltage from said dipole configuration, the improvement comprising means mounted in each of said cavities to suppress said resonance induced within said cavities by preventing resonant current flow in said rods.
Claim 2
Dependent Claim
193 words
In a biconical dipole antenna comprising a pair of electrically conducting support rods, each having a proximal and a distal end, a plurality of electrically conducting wires distributed around each end of each of said support rods, each wire having one end electrically connected to the distal end of the corresponding support rod and a second end electrically connected to the corresponding support rod at a location between said distal end and the proximal end of the rod, said wires being spaced uniformly around the corresponding support rod to define a conical cavity around each rod, and means for mounting said rods and wires in a dipole configuration, said dipole configuration producing an output voltage in response to incident radiation and being susceptible to resonance induced within each of said conical cavities by detected incident radiation and causing a sharp peak in the curve representing the variation with frequency of the ratio of the intensity of the incident electric field to output voltage from said dipole configuration, the improvement comprising means mounted in each of said cavities to suppress said resonance induced within said cavities by preventing resonant current flow in said rods.
Claim 3
Dependent Claim
34 words
A biconical dipole antenna as recited in claim 1, wherein said means to suppress resonance within each said cavity comprises a magnetic choke on the corresponding support rod and within each said conical cavity.
Claim 4
Dependent Claim
16 words
A biconical dipole antenna as recited in claim 2, wherein said choke comprises a ferrite choke.
Claim 5
Dependent Claim
38 words
A biconical dipole antenna as recited in claim 1, wherein said support rods are supported to be coaxial with each other by a mast at the proximal ends thereof, said mast being oriented orthogonally to said support rods.
Claim 6
Dependent Claim
28 words
A biconical dipole antenna as recited in claim 2, wherein said choke is located closer to the proximal end of each conical cavity than to the distal end.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-11-21 | 1998-05-23 | 1998-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-21 | 2002-05-23 | 2002-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-21 | 2006-05-23 | 2006-11-22 | $7700.00 | Window Closed / Lapsed |