Estimate of the Measurement Uncertainty of the Insertion Loss in Continuous Stirred Reverberation Chambers Including Frequency Stirring

The article presents the results of studies to improve the National primary standard machine for hardness of metals on the shore D scale GET 161-2001, which were performed in FSUE “VNIIFTRI” from 2016 to 2018 in accordance with the technical task of Rosstandart.The improvement was carried out in order to ensure the uniformity of hardness measurements on the Leeb scales. The created new parts of the primary standard machine, which are settings for reproducing hardness numbers on the Leeb scales, are considered. Metrological characteristics of the upgraded and adopted National primary standard machine (GET 161-2019) were investigated, the budget of measurement uncertainty was calculated for reproducing hardness numbers on the Leeb scales.

Download Full-text

Method for Evaluating Insertion Loss of EMI Filter Connected to Semiconductor Power Converters

IEEJ Transactions on Industry Applications ◽

10.1541/ieejias.132.727 ◽

2012 ◽

Vol 132 (7) ◽

pp. 727-735 ◽

Cited By ~ 5

Author(s):

Michio Tamate ◽

Tamiko Sasaki ◽

Akio Toba ◽

Yasushi Matsumoto ◽

Keiji Wada ◽

...

Keyword(s):

Insertion Loss ◽

Power Converters ◽

Emi Filter

Download Full-text

Performance and Reliability of a MEMS-based tunable optical filter operating in the 1565 nm-1525 nm wavelength range

MRS Proceedings ◽

10.1557/proc-722-k6.3 ◽

2002 ◽

Vol 722 ◽

Author(s):

T. S. Sriram ◽

B. Strauss ◽

S. Pappas ◽

A. Baliga ◽

A. Jean ◽

...

Keyword(s):

Silicon Nitride ◽

Line Width ◽

Insertion Loss ◽

Optical Filter ◽

Single Mode ◽

Single Mode Fiber ◽

Reliability Testing ◽

Silicon Nitride Membrane ◽

Tunable Optical Filter ◽

Extensive Performance

AbstractThis paper describes the results of extensive performance and reliability characterization of a silicon-based surface micro-machined tunable optical filter. The device comprises a high-finesse Fabry-Perot etalon with one flat and one curved dielectric mirror. The curved mirror is mounted on an electrostatically actuated silicon nitride membrane tethered to the substrate using silicon nitride posts. A voltage applied to the membrane allows the device to be tuned by adjusting the length of the cavity. The device is coupled optically to an input and an output single mode fiber inside a hermetic package. Extensive performance characterization (over operating temperature range) was performed on the packaged device. Parameters characterized included tuning characteristics, insertion loss, filter line-width and side mode suppression ratio. Reliability testing was performed by subjecting the MEMS structure to a very large number of actuations at an elevated temperature both inside the package and on a test board. The MEMS structure was found to be extremely robust, running trillions of actuations without failures. Package level reliability testing conforming to Telcordia standards indicated that key device parameters including insertion loss, filter line-width and tuning characteristics did not change measurably over the duration of the test.

Download Full-text