A5053502057- Microwave and Dielectric Measurement Techniques
- Advanced Electrical Measurement Techniques
- Electromagnetic Compatibility and Measurements
- Superconducting and THz Device Technology
- Radio Frequency Integrated Circuit Design
- Sensor Technology and Measurement Systems
- Microwave Engineering and Waveguides
- Terahertz technology and applications
- Structural Health Monitoring Techniques
- Scientific Measurement and Uncertainty Evaluation
- Photonic and Optical Devices
- Electromagnetic Compatibility and Noise Suppression
- Acoustic Wave Resonator Technologies
- Advanced Thermoelectric Materials and Devices
- Power Line Communications and Noise
- Power Quality and Harmonics
- Electromagnetic wave absorption materials
- Probabilistic and Robust Engineering Design
- Wireless Body Area Networks
- Microwave Imaging and Scattering Analysis
- Engineering Applied Research
- Millimeter-Wave Propagation and Modeling
- Machine Fault Diagnosis Techniques
- Electronic Packaging and Soldering Technologies
- Gyrotron and Vacuum Electronics Research
National Physical Laboratory
2021-2024
Tübitak National Metrology Institute
2001-2023
Scientific and Technological Research Council of Turkey
2012
Kocaeli Üniversitesi
2011
Abstract Development of large-scale quantum computing systems will require radio frequency (RF) and microwave technologies operating reliably at cryogenic temperatures down to tens milli-Kelvin (mK). The bits in the most promising such as superconducting are designed using principles engineering operated signals. control, readout, coupling qubits implemented a network components various temperature stages. To ensure reliable operation systems, it is critical optimal performance these their...
This article presents the design, fabrication, and characterization of a D-band (110–170 GHz) bolometric power sensor, used for millimeter-wave metrology. sensor type is new thin-film-based which consists multilayer chip embedded in silicon substrate as microwave absorber. The demonstrates reasonable performance with return loss better than 15 dB across entire rise fall times 1.8 ms. achieves high linearity between −10 +8 dBm. Frequency response was measured, its flatness changes no more 20%...
This article proposes a new calorimetry-based measurement method to measure absolute microwave power obtained through dc substituted from 110 170 GHz (WG 29, WR 6/7, or D-band) using custom-designed thin-film sensor. complements traditional microcalorimetry techniques used provide traceability for in this band while diversifying the potential applications and accessibility such traceability. The thermopile of system was characterized known with sensor coefficient obtained. Absolute on...
Abstract The graphene nanofiller (2 wt%) was dispersed in poly(methyl methacrylate) by situ polymerization method. optimum high frequency (microwave) absorption evaluated at X‐band due to changes the scattering parameters (determined using a vector network analyzer). slight improvement has been attained gamma attenuation coefficient of polymer nanocomposite transmission technique. addition nanoplatelets resulted thermal from 196.73 243.00°C (with 5% weight loss) TGA analysis. provided an...
The aim of this study is to examine the characterization a thermal isolation section (TIS) for waveguide microcalorimeter, used characterize effective efficiency thermistor power sensor (TPS). loss in TIS has been analyzed both dielectric and conductor losses. Its effect on thermopile output assessed using foil short method through analysis heating ratio. This involves one-off measurement microcalorimeter system with before unknown does not require additional S-parameters measurements...
This paper describes a new coaxial twin-load microcalorimeter, which was designed and fabricated to be installed at the national metrology institute of Egypt (NIS). Each component microcalorimeter measurement setup measured characterized separately ensure its performance. The effective efficiency type-N thermistor mount different frequency points using setup. A comparison between these values corresponding by Turkey (TÜBİTAK UME) done validate accuracy
NPL, PTB, and LNE designed produced three different microcalorimeters for the WG29/WR7 band. The used correction methods to characterize effective efficiency. Finally, laboratories measured thermoelectric power sensors from 110 GHz 170 demonstrate equivalence results show good agreement.
The performance parameters of a total power radiometer designed as noise measurement system for the frequency range 12-18 GHz were investigated. included low-noise radio section, narrow-band intermediate an average detector, and symmetric microwave switch. radiometer's stability versus time was 0.343 \times 10^{-5} mW/h its against temperature fluctuation 0.0035 mW/K. less than 4 mK. We proved that there no need active control to obtain stable gain.
This paper investigates the influence of second and third harmonic components in signal on a measured RF power level when diode sensors are employed. The impact is first demonstrated through modeling detectors for worst case scenario. We proposed an approximate general formula calculating measurement errors due to higher components. A method sensitivity also described. Finally, we validated our model with experimental data several sensors.
The aim of this paper is to compare the power measurement capabilities in millimetre- and sub-millimetre-wave frequency bands several national metrology institutes one research institute. first comparison, WR-6.5 waveguide (110 GHz 170 GHz), involved NPL, TUBITAK UME PTB. second WR-1.5 (500 750 METAS, UME, LNE, WAT, GUM VDI. Two types travelling standards were used for these comparisons: a thermoelectric sensor band calorimetric bands. was characterised by participants against their own...
The MIL-STD-461F CS101 test is one of the essential low-frequency conducted immunity tests for military and aerospace equipment between 30 Hz 150 kHz, however it includes some challenges pitfalls in application. major pitfall necessity measurement injected ripples across EUT also power source side under presence frequency EUT, whose solutions have been thoroughly studied introduced our earlier papers. other critical that influence injection point decoupling capacitor position may reach...
We experimentally investigated the influence of dielectric supports used on RE102 radiated emission tests MIL-STD-461F EMC standard for table-top and conductive surface mounted Equipment Under Test (EUT). A variety materials which are commonly selected as under EUT cables in were by using an actual test setup a semi anechoic chamber. Each material yielded different effects results comparison to case without support, other words, with air support.
A bolometric thin-film-based transfer standard with a novel structure for absolute power detection in D-band (110–170 GHz) is reported. It uses resonance-type matching technique thin-film resistive lines. The same line functions as the sensing element. change resistivity of under incident wave calibrated to measure RF D-band. This article presents analysis using equivalent circuit models, full-wave electromagnetic design, fabrication, and comprehensive characterization device. comparison...
This article proposes a new approach to background noise (BN) cancellation for low-frequency electromagnetic compatibility (EMC) emission testing between 30 Hz and 10 kHz. The method proposed in this is based on the streaming recording of oscilloscope data continuous period without interruption losing phase information. In method, consecutive stream contains two adjacent segments inside. first segment consists equipment under test (EUT) BN information together, whereas second only because...
The MIL-STD-461 CS101 test is one of the essential low-frequency conducted immunity tests for military and aerospace equipment, however it includes some challenges in application. major challenge necessity measurement injected ripples under power frequency EUT. on almost impossible without taking extra precautions. In addition to hard measuring ripple voltage induced across EUT input, other that drops source side AC now required by MIL-STD-461G, which aggravates severe conditions devices....
Measuring receivers are used for measurement of radio disturbance in the frequency range typically 9 kHz to 18 GHz.Such can be either electromagnetic interference (EMI) or spectrum analyzers with quasi-peak (QP) detector [1], [2].Requirements measuring discussed European CISPR documents (Comité International Spécial des Perturbations Rádioélectriques) and US standards ANSI 63.2 (QP parts derived from CISPR).Although novel techniques being evaluated [3], traditional way checking compliance...
Mobil telefonların Özgül Soğurma Oranı (Specific Absorption Rate) değerinin belirlenmesi için yapılan ölçümler öncesinde ölçüm düzeneğinin doğrulanması gerekir
In recent years, BNC type devices such as attenuator and termination are used for high frequency measurements. Unfortunately, there is no any primary standard to obtain traceability devices. It proposed N adapter characterization approach calibration standards, opens, shorts matched loads of Electrical delay calculated characterize then it measurement standards. To validate approach, known standards measured compared with actual results. Obtained results show good agreement. Difference...
Bilateral comparison of calibration factor microwave power sensor was carried out between National Metrology Institute Turkey (TÜBİTAK UME) and Measurement Calibration Center at Saudi Standards, Quality Organization the Kingdom Arabia (SASO NMCC). In this comparison, TÜBİTAK UME pilot laboratory supplied travelling standard with N type connector. Nine different frequency points 0 dBm level were determined for in prepared technical protocol. Each participant used their own measurement...
The paper discusses the influence of higher harmonic components in measured signal on measurement uncertainty RF level when diode power sensors are used. A method is proposed to evaluate different based content.
A Euromet international laboratory comparison (Project 393) has been carried out between 14 national standards laboratories. Thermistor mounts were used, equipped with PC7 as well Type N connectors. The is using the normal equipment of for high-quality external calibration. results show good agreement in measuring calibration coefficient thermistor within claimed expanded uncertainty (typically 1% and 2%). It confirms equivalence RF power up to 18 GHz. In one case, corrective action proposed.