Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1981-10-26
1983-11-15
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 58R, 333223, G01R 2704, H01P 704
Patent
active
044158521
ABSTRACT:
A single hybrid junction discriminator is described for operation over a wide operating frequency range. The single hybrid discriminator uses a transmission line, phase shifters and fixed short circuits in providing a resonant cavity in the discriminator element to form a device that will measure near carrier frequency modulated noise on a carrier frequency. Only a minimum exchange of circuit components is required for changed carrier frequencies. With the phase shifter located in the signal channel, operation is a direct and easy process for quadrature detection. Component arrangement is critical to the operation of the single hybrid discriminator. The single hybrid discriminator is more sensitive than either the two hybrid or one hybrid and a directional coupler type discriminator because better usage is made of the available signal power.
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R. A. Campbell, "Stability Measurement Techniques in the Frequency Domain", EEE-NASA Symposium on Short Term Frequency Stability, NASA AP-80, Nov. 23-24, 1964, pp. 231-235.
J. Nigrin et al., "Single Hybrid Tee Frequency Discriminator", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-23, No. 9, Sep. 1975, pp. 776-778.
R. Knochel et al., "Comments on the Measurement of Noise in Microwave Transmitters", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-27, No. 1, Jan. 1979.
Ashley James R.
Barley Thomas A.
Rast, Jr. Gustaf J.
Bush Fred M.
Gibson Robert P.
Krawczewicz Stanley T.
Lane Anthony T.
Solis Jose M.
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