US3961330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna system utilizing currents in conductive body
Assignee: Individual
•
Filing: 1975-02-24
•
Granted: 1976-06-01
•
Expires: 1995-02-24
Abstract
Abstract An improved antenna system for the transmission and/or reception of electromagnetic signals is described which utilizes a region or regions of natural current concentration within the conductive portion or portions of fixed or mobile structures for the extraction or insertion of electromagnetic energy.
Inventors
- 👤 Ross Alan Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:14
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
An antenna system for operation at at least one intended frequency, said antenna system including: an electrically conductive three-dimensional body forming a closed loop for the flow of radio frequency signals therethrough at said at least one intended frequency when said body is exposed to a radio frequency field, said loop having a length which is short with respect to a resonant fraction of a wavelength at said intended frequency; a column of relatively reduced cross-sectional area connecting major surfaces of said body and through which said radio frequency signals tend to flow; means cooperating with said column portion for increasing the electrical impedance of a segment of said column portion; and, body resonating means connected directly to said column portion across said segment for producing forced electrical resonance of said body at said intended frequency.
Claim 2
Dependent Claim
136 words
An antenna system for operation at at least one intended frequency, said antenna system including: an electrically conductive three-dimensional body forming a closed loop for the flow of radio frequency signals therethrough at said at least one intended frequency when said body is exposed to a radio frequency field, said loop having a length which is short with respect to a resonant fraction of a wavelength at said intended frequency; a column of relatively reduced cross-sectional area connecting major surfaces of said body and through which said radio frequency signals tend to flow; means cooperating with said column portion for increasing the electrical impedance of a segment of said column portion; and, body resonating means connected directly to said column portion across said segment for producing forced electrical resonance of said body at said intended frequency.
Claim 3
Dependent Claim
14 words
Apparatus according to claim 1 in which said body resonating means is a capacitor.
Claim 4
Dependent Claim
14 words
Apparatus according to claim 2 in which said three-dimensional body is a vehicle body.
Claim 5
Dependent Claim
56 words
Apparatus according to claim 3 in which said vehicle is an automobile, said column portion is a window column, said means for increasing the electrical impedance of a segment of said column portion is an electrical insulator interposed in said column portion for the length of said segment, and said resonating means is a variable capacitor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |