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 Title: |
US4547728:
RF Wattmeter
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Mecklenburg, Frank H.; Chagrin Falls, OH
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| Assignee: |
Bird Electronic Corporation, Solon, OH
other patents from BIRD ELECTRONIC CORPORATION (66570) (approx. 18)
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| Published / Filed: |
1985-10-15
/ 1982-08-31
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| Application Number: |
US1982000413537
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| IPC Code: |
Advanced:
G01R 21/00;
G01R 21/01;
G01R 21/12;
H04B 1/02;
H04B 17/00;
Core:
more...
IPC-7:
G01R 21/04;
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| U.S. Class: |
Current:
324/095;
324/099.R;
324/119;
Original:
324/095;
324/099.R;
324/119;
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| Field of Search: |
324/58 B,58 A,58 R,95,99 R,99 D,119,132
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| Priority Number: |
| 1982-08-31 |
US1982000413537 |
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| Abstract: |
An RF wattmeter is disclosed of the type using an "insertion-type" pick-up element to produce a voltage wave signal corresponding to the measured power in the coaxial transmission line. The induction loop in the pick-up element is connected to a principal detector, and a secondary detector is connected in opposition to the principal detector. Both detectors are located in close proximity to each other and are subject to the same thermal environment. A sine wave generator supplies a wave signal to the secondary detector in opposition to the wave signal supplied to the principal detector from the inductive loop. The d.c. portion of the resulting signal representing the difference between the opposed signals is integrated, and the integrated output is used as the amplitude in the generated sine wave. When the circuit is in balance, the integrated output matches the amplitude of the inductive wave form and can be used as an output indicating measured power in the coaxial transmission line.
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| Attorney, Agent or Firm: |
Pearne, Gordon, Sessions, McCoy, Granger & Tilberry ;
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| Primary / Asst. Examiners: |
Levy, Stewart J.; Baker, S.
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
DE FR GB IT
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| Family: |
Show 11 known family members
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First Claim:
Show all 20 claims |
What is claimed is:
1. An electronic instrument for measuring RF power levels on a coaxial transmission line comprising:
means for sensing the RF voltage levels on the transmission line and producing a first voltage wave signal proportional thereto;
- first detector means for translating the first voltage wave signal from the sensing means into a sensed voltage wave signal corresponding to power in the transmission line;
- means for generating a second voltage wave signal;
- second detector means connected in opposition to the first detector means for translating the second voltage wave signal and supplying it in opposition to the sensed voltage wave signal to produce a difference signal;
- means connecting the generating means and the second detector means, the connecting means comprising a line carrying a single composite signal, the second voltage wave signal and the difference signal forming parts of the single composite signal; and
- means connected to the connecting means for integrating the difference signal to produce an output signal.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 2 U.S. patent(s) that reference this one
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