US3755735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature and load compensated r.f. detector for peak power measurement system
Assignee: Republic Electronics Co
•
Filing: 1972-01-26
•
Granted: 1973-08-28
•
Expires: 1992-01-26
Abstract
Abstract A detector circuit for a radio frequency peak power measurement system includes a shielded transmission line and two identical diodes spaced a quarter wavelength apart and connected across the line. A variable power supply in a slideback arrangement provides a bias to the diodes which are thereby always maintained in a cutoff condition.
Inventors
- 👤 A Biagi
- 👤 Garrett D Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:14
CPC Classifications
G; G01; G01R; G01R21/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
272 words
A diode detector circuit for a radio frequency peak pulse power measurement system which is connected to a source of radio frequency power to be measured comprising a transmission line having a pair of conductors one end of said conductors being an input end and the other end of said conductors being an output end, said input end of said conductors being connected to said source for application of said radio frequency power to said line, said line having a length equal to at least one quarter wavelength of said radiofrequency power to be measured, one of said conductors being connected to a ground potential, a first diode rectifier having an anode and a cathode, said anode being connected to the other of said conductors at said input end, a second diode rectifier having an anode and a cathode, said anode being connected to the other of said conductors at said output end, the spacing between said anodes of said first and second diodes being one-quarter wavelength of said radio frequency power to be measured, means for coupling together said cathodes from said first and second diode rectifiers and for biasing said first and second diodes to cutoff when said peak power is applied to said line; a resistance load connected across said line at said output, said load being matched to said line, said first and said second diode having substantially the same physical parameters so that the peak voltage value of said radio frequency voltage appearing across said resistance load is substantially equal to the peak voltage value of said radio frequency power applied to said input of said line.
Claim 2
Dependent Claim
272 words
A diode detector circuit for a radio frequency peak pulse power measurement system which is connected to a source of radio frequency power to be measured comprising a transmission line having a pair of conductors one end of said conductors being an input end and the other end of said conductors being an output end, said input end of said conductors being connected to said source for application of said radio frequency power to said line, said line having a length equal to at least one quarter wavelength of said radiofrequency power to be measured, one of said conductors being connected to a ground potential, a first diode rectifier having an anode and a cathode, said anode being connected to the other of said conductors at said input end, a second diode rectifier having an anode and a cathode, said anode being connected to the other of said conductors at said output end, the spacing between said anodes of said first and second diodes being one-quarter wavelength of said radio frequency power to be measured, means for coupling together said cathodes from said first and second diode rectifiers and for biasing said first and second diodes to cutoff when said peak power is applied to said line; a resistance load connected across said line at said output, said load being matched to said line, said first and said second diode having substantially the same physical parameters so that the peak voltage value of said radio frequency voltage appearing across said resistance load is substantially equal to the peak voltage value of said radio frequency power applied to said input of said line.
Claim 3
Dependent Claim
39 words
A diode detector circuit as defined in claim 1, wherein said means for biasing said first and second diodes to cutoff comprises a source of variable DC voltage connected to the cathodes of said first and second diode rectifiers.
Claim 4
Dependent Claim
24 words
A diode dectector as recited in claim 2 further comprising a radio-frequency capacitor connected between said diodes and said source of variable DC voltage.
Claim 5
Dependent Claim
19 words
A diode detector as defined in claim 2 wherein said variable DC voltage source comprises a slideback voltage circuit.
Claim 6
Dependent Claim
38 words
A diode detector circuit as defined in claim 4 further comprising a peak power meter connected to said variable DC voltage source for measuring said peak value of radio frequency voltage applied to said input of said line.
Claim 7
Dependent Claim
24 words
A diode detector circuit as defined in claim 5 further comprising a capacitor connected between said diodes and said source of variable DC voltage.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |