A Microwave Secondary Frequency Standard

1 September 1948

journal article
research article
Published by AIP Publishing in Review of Scientific Instruments

Vol. 19 (9) , 580-585
https://doi.org/10.1063/1.1741331

Abstract

A method of obtaining accurate frequency markers every 90 megacycles from 2970 megacycles to above 40,000 megacycles is described. Interpolation between markers is possible by means of a calibrated standard communications receiver. The basic frequency of 10 megacycles is continuously checked against the primary frequency standard broadcast by WWV. This equipment may be used for measuring the frequencies of spectra observed in microwave spectroscopy or for accurately calibrating microwave wavemeters. A table of absorption lines providing reference frequencies between 23,000 and 40,000 megacycles is given.

Keywords

This publication has 7 references indexed in Scilit:

Structure of the Inversion Spectrum of Ammonia
Physical Review B, 1948
Frequency Stabilization of Microwave Oscillators by Spectrum Lines
Journal of Applied Physics, 1947
A Microwave Frequency Standard
Proceedings of the IRE, 1947
A Method for Calibrating Microwave Wavemeter
Proceedings of the IRE, 1947
Microwave Absorption Frequencies of $N^{14}$ $H_{3}$ and $N^{15}$ $H_{3}$
Physical Review B, 1947
Inversion Spectrum of Ammonia
Physical Review B, 1947
Precision Determination of Frequency
Proceedings of the IRE, 1928