Microwave measurements in the N.B.S. Electronic Calibration Center

In the Electronic Calibration Center of the National Bureau of Standards Radio Standards Laboratory, Boulder, Colorado, work is proceeding towards the establishment or extension of calibration services over a broad range of frequencies in the microwave region. At the present time, measurements can be made over limited portions of the frequency spectrum for the quantities of low-level c.w. power, reflection coefficient, frequency and attenuation. Calibration services are currently provided for all of these quantities. Instrumentation for the measurement of microwave noise is near completion. A survey is given of the microwave measurement techniques employed in this work.