US3718931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial field monitoring
Assignee: International Standard Electric Corp
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Filing: 1971-07-21
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Granted: 1973-02-27
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Expires: 1991-07-21
Abstract
Abstract The radiated field of a dipole at any point is directly related in amplitude and phase to the current in the dipole arms. This can be sampled by a slot cut in the dipole arm. The voltage across this slot is fed to a transmission line which may be matched to subsequent processing units by a suitable positioning of a resistor. This enables both the R.F. current from the power fed to the dipole, and the current produced by interaction with other radiating elements to be measured.
Inventors
- 👤 R Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:16
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/20; H01Q9/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
69 words
A method for monitoring the radiated field of a dipole at any point in the field comprising: cutting a slot in the dipole arm; coupling a transmission line to said slot; inserting an ohmic resistor equal to the characteristic impedance of said transmission line at a predetermined distance from said slot for matching said line to a receiving unit; and measuring the amplitude and phase of the r.f. current.
Claim 2
Independent Claim
69 words
A method for monitoring the radiated field of a dipole at any point in the field comprising: cutting a slot in the dipole arm; coupling a transmission line to said slot; inserting an ohmic resistor equal to the characteristic impedance of said transmission line at a predetermined distance from said slot for matching said line to a receiving unit; and measuring the amplitude and phase of the r.f. current.
Claim 3
Dependent Claim
27 words
A method according to claim 1 wherein said predetermined distance equals one-half of a wave length at the operating frequency in the case of a series connection.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein said distance in one quarter of a wavelength in the case of a shunt connection.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |