Martin J. Salter

A Technique to Improve Accuracy of S-Parameter Measurements of Coaxial Connectorized Devices at Cryogenic Temperatures

Manoj Stanley, Murat Celep, Asem Elarabi, Martin J. Salter et autres

Recent developments in microwave-based quantum computing technologies have motivated the need for the development of new and improved cryogenic microwave devices packaged in coaxial connectorized technology, and for their performance to be accurately characterized through S-parameter measurements made at cryogenic operating temperatures. …

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S-Parameter Analysis of Age Testing Effects on FR4-Based Printed Circuit Boards up to 10 GHz

Lewis Manning, Martin J. Salter, Martin Wickham, Ana Robador et autres

To allow fast deployment of new communication technologies all over the world, devices compliant with these standards must be able to operate over a wide range of temperatures and humidity conditions. Considering that these devices are usually implemented on Printed Circuit Boards …

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Characterisation of Power Transistors for Wireless Network Applications Using Passive and Active Load-Pull

Dilbagh Singh, Martin J. Salter, Nick Ridler

Power transistors are important devices in the transmit chains of wireless communication networks. In this paper, two methods are discussed for the characterisation of power transistors namely passive and active load-pull. The load impedance at the output of the transistor is swept …

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RF and microwave metrology for quantum computing – recent developments at the UK’s National Physical Laboratory

Manoj Stanley, Xiaobang Shang, Murat Celep, Martin J. Salter et autres

Abstract Development of large-scale quantum computing systems will require radio frequency (RF) and microwave technologies operating reliably at cryogenic temperatures down to tens of milli-Kelvin (mK). The quantum bits in the most promising quantum computing technologies such as the superconducting quantum computing …

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Characterizing S-Parameters of Microwave Coaxial Devices With up to Four Ports at Temperatures of 3 K and Above for Quantum Computing Applications

Manoj Stanley, Martin J. Salter, Jonas Urbonas, James Skinner et autres

Multi-port microwave devices operating at cryogenic temperatures are used in quantum computing to enable complex quantum operations. These components need to be precisely characterized at their operating temperature to ensure adequate overall system performance. In this work, an S-parameter measurement system to …

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RF Measurements for Future Communication Applications: an Overview

Djamel Allal, Richard Bannister, Koen Buisman, Domenico Capriglione et autres

In this paper research activities developed within the FutureCom project are presented. The project, funded by the European Metrology Programme for Innovation and Research (EMPIR), aims at evaluating and characterizing: (i) active devices, (ii) signal- and power integrity of field programmable gate …

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Uncertainties in Small-Signal and Large-Signal Measurements of RF Amplifiers Using a VNA

Dilbagh Singh, Martin J. Salter, Susan Johny, Nick Ridler

Uncertainties in typical small-signal and large-signal amplifier parameters measured using a vector network analyzer (VNA) are investigated in this paper. Methods to evaluate the measurement uncertainty in return losses, input power, output power, power gain, 1 dB compression point, etc., based on …

RF Measurements for Future Communication Applications: an Overview

Djamel Allal, R. Bannister, Koen Buisman, Domenico Capriglione et autres

In this paper research activities developed within the FutureCom project are presented. The project, funded by the European Metrology Programme for Innovation and Research (EMPIR), aims at evaluating and characterizing: (i) active devices, (ii) signal- and power integrity of field programmable gate …

fr, gb, it, es, de, ch, nl (code pays fourni par la source)

Design of Microwave Calibration Standards for Characterising S-Parameters of Quantum Integrated Circuits at Millikelvin Temperatures

Manoj Stanley, Sebastian E. de Graaf, T. Lindström, Martin J. Salter et autres

In the field of quantum information science, superconducting quantum integrated circuits are operated at millikelvin temperatures inside dilution refrigerators. The microwave performance of such non-connectorised devices can be characterised by measuring their calibrated S-parameters. The design of high-quality microwave standards is essential …

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Non-linear measurements for 5G devices and the associated uncertainties

Martin J. Salter, Dilbagh Singh, Laurence T. Stant

Chapter Contents: 3.1 Introduction 3.2 Non-linear vector network analyser measurements 3.2.1 Introduction to NVNA measurements 3.2.2 NVNA calibration 3.2.3 Time domain vs frequency domain 3.3 Load-pull measurements 3.3.1 Introduction to load-pull measurements 3.3.2 Load-pull set-up and measurement procedure 3.3.3 Typical load-pull results …

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Uncertainty of S-Parameter Measurements on PCBs due to Imperfections in the TRL Line Standard

Hyunji Koo, Martin J. Salter, No-Weon Kang, Nick Ridler et autres

This paper evaluates the uncertainty of S-parameter measurements on multilayer printed circuit boards (PCBs) due to the uncertainties of the dimensions and dielectric properties of the line standard in the Thru-Reflect-Line (TRL) calibration. This evaluation is performed in two ways: one is …

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Commissioning of a VNA dynamic uncertainty tool for microwave S-parameter measurements

D. Singh, Martin J. Salter, James Skinner, Nick Ridler

All measurements have an associated uncertainty and it is important to know the uncertainty in order to quantify the reliability of the measurement result. At the National Physical Laboratory (NPL), the provision of scattering parameter (S-parameter) measurements at microwave frequencies for customers …

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