Accession Number:

AD0261890

Title:

A SAMPLING TECHNIQUE FOR THE MEASUREMENT OF HARMONIC POWER IN MULTIMODE WAVEGUIDE

Descriptive Note:

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s):

Report Date:

1961-02-01

Pagination or Media Count:

1.0

Abstract:

A compact method is described of measuring the harmonic power, generated by a high-power transmitter, which can propagate in many different waveguide modes. In this method the H-fieldAROUND THE PERIPHERY OF THE WAVEGUIDE IS SAMPLED BY MEANS OF EVENLY SPACED IRISES. Each iris is connected to a matched, calibrated detector. It is shown theoretically that by averaging the appropriate detector outputs the total multimode power propagating in the waveguide at a given frequency can be determined in most cases to within 3 to 5 db. In principle the total power propagating at each harmonic frequency can be measured instantaneously and continuously by summing, in appropriate circuitry, the output of the various detectors. The results of experimental measurements made at low and high powers are included. A measurement of the third harmonic power of the QK-338 magnetron was made. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE