The True-Twin microcalorimeter: a proof-of-concept experiment

TL;DR

This paper demonstrates a proof-of-concept for a true-twin microcalorimeter that simplifies microwave power measurement, reduces calibration time, and maintains accuracy by using twin feeding lines to eliminate the need for separate system characterization.

Contribution

The paper introduces a novel true-twin microcalorimeter design that simplifies calibration procedures and halves measurement time compared to traditional methods.

Findings

Effective efficiency spectroscopy matches established methods.

Calibration process is simplified and faster.

Feasibility of the true-twin approach is demonstrated.

Abstract

We present a proof-of-concept experiment to realize microwave primary power standard with a true-twin microcalorimeter. Double feeding line microcalorimeters are widely used by National Metrology Institutes. A drawback concerns the system calibration: traditional processes changes measurement conditions between system characterization and the measurement stage. Nevertheless, if the feeding lines are made twin, a measurement scheme that avoids separate characterization can be applied, equations simplify and time consumption is halved. Here we demonstrates the feasibility of the idea. The result of an effective efficiency spectroscopy of a thermoelectric power sensor is compared with figures obtained with well established methods.