Calibration features for power meters of high and microwave frequencies

Abstract

Microwave frequency power measurement is one of the main types of the measurement for measuring instruments and systems in the radio frequency range. Therefore, improving the accuracy of measuring the microwave frequency power requires the establishment of more precise standards, and the development of calibration methods for meters of microwave frequency power is an urgent task. Microwave frequency power standards that are used to calibrate the relevant measuring instruments must ensure high accuracy of the unit size reproduction over a wide measurement and frequency range.
 The study allowed determining typical calibration schemes for meters of microwave frequency power. For measurements, the calibration scheme for meters of microwave frequency power by the method of a direct comparison with the help of a calibrator when measuring the absorbed power of microwave frequencies is substantiated and suggested.
 The proposed methodology for evaluating the uncertainty of absorbed power measurements can be used when calibrating power meters in the frequency range from 30 MHz to 18 GHz. It allows determining the most significant components of the combined standard uncertainty of the absorbed power measurements of ultrahigh frequencies, as well as to receive the result of the corresponding calibration. This methodology can also be used to evaluate the uncertainty of microwave frequency directional measurements.

Calibration of High and Ultra-High Frequency Power Meters in the Range of Up to 30 MHZ

“…Calibration of HF and UHF power sensors at a frequency of 19 GHz is considered in recommendation EA-04/02 [4]. Features of calibration of various HF and UHF power meters in the frequency range from 30 MHz to 18 GHz are considered in many scientific works [1,[5][6][7][8][9][10]. At the same time, there are practically no works devoted to the calibration of HF and UHF power meters in the frequency range of up to 30 MHz.…”

“…High-frequency (HF) and ultra-high-frequency (UHF) power measurements are applied in various industries both in the development and design of radioelectronic equipment and in testing, commissioning, or repair. Since such measurements are one of the basic types of measurement for metrological support in the field of radio engineering and communication, it is necessary to ensure metrological traceability of the calibration of working standards and measuring instruments to standards on fundamental constants in wide frequency and dynamic ranges [1,2]. Fig.…”