Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1976-01-26
1977-01-11
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 2700
Patent
active
040029719
ABSTRACT:
A wide operating frequency range transmission line discriminator uses an imum length transmission line which permits near carrier frequency modulation to be measured on a carrier frequency in a broad range from approximately two megahertz to one gigahertz. A hybrid junction, balanced phase detector, power dividers, attenuators and a variable transmission line coupled with the optimum length transmission line provide a wide frequency range discriminator with only a minimum exchange in selected components being necessary for changes in carrier frequency. This near carrier analyzer operates over the wide frequency range with the only component changes being an input bandpass filter, the optimum length transmission line, and the variable length transmission line used as a variable or adjustable phase shift device. The transmission line sections are easily changed by simply selecting proper line lengths which may be previously established. When optimum detection is not essential in a particular measurement, the optimum length transmission line can effectively operate and accomplish its function over several octaves of frequency range with minimal analyzer degradation, on the order of three decibels. In measuring frequency modulation noise, carrier nulling in excess of 60 decibels is accomplished. After this carrier null has been accomplished, the discriminator circuit rejects incidental amplitude modulation on the test signal, and is not restricted by burnout power ratings of crystals within the phase detector.
REFERENCES:
patent: 3675124 (1972-07-01), Ashley et al.
patent: 3693076 (1972-09-01), Nugent et al.
Ashley James R.
Barley Thomas A.
Rast, Jr. Gustaf J.
Bush Freddie M.
Edelberg Nathan
Gibson Robert P.
Krawczewicz Stanley T.
The United States of America as represented by the Secretary of
LandOfFree
Wide operating frequency range transmission line discriminator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wide operating frequency range transmission line discriminator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide operating frequency range transmission line discriminator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1746173