The Nist 30/60 Mhz Tuned Radiometer for Noise Temperature Measurements

Chriss A. Grosvenor, Robert L. Billinger

ISBN 10: 1390528243 / ISBN 13: 9781390528244

Published by Forgotten Books, 2024

About this Item

Print on Demand. This book is from 1997, and describes a radiometer for calibrating noise temperature at low frequencies, below about 1 GHz. It provides an overview of the radiometer system as it was put together during that time, including its theoretical background, experimental setup, and the uncertainty analysis for this system. A radiometer is a device designed to amplify and measure noise, which can then be used to infer the temperature of a system or device. The book discusses the various components of the radiometer system, including the preamplifier, filters, attenuators, and detectors, and how they are used to measure noise power. It also discusses the importance of matching the impedance of the radiometer to the impedance of the DUT (device under test) to minimize errors. The book provides a detailed analysis of the uncertainty of the system, taking into account factors such as mismatch errors, asymmetry errors, and nonlinearity effects. The book concludes by discussing the significance of the radiometer system for calibrating noise temperature at low frequencies, and its potential applications in various fields such as telecommunications and radar systems. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book.

Seller Inventory # 9781390528244_0

Bibliographic Details

• Title: The Nist 30/60 Mhz Tuned Radiometer for Noise Temperature Measurements
• Publisher: Forgotten Books
• Publication Date: 2024
• Language: English
• ISBN 10: 1390528243
• ISBN 13: 9781390528244
• Binding: Paperback
• Condition: New
• Book Type: print-on-demand item
• Seller catalogs:
  • Electronics

About this title

Synopsis

Understand how a 30/60 MHz tuned radiometer measures noise temperature with stability and precision.

This nonfiction guide reviews a revised NIST radiometer system designed for low-frequency measurements where isolators are impractical. It explains the theory, design, testing, and capabilities of the tuned setup, including how matching to the device under test reduces errors and how uncertainty is analyzed.

The book walks you through the system from concept to operation. It covers the rationale for tuning ambient and cryogenic standards to the DUT impedance, the impact of mismatch and path asymmetry, and the way measurements stay reliable over time. You’ll find practical details on the measurement sequence, components, and the steps taken to ensure temperature stability and measurement repeatability. A thorough uncertainty analysis shows how Monte Carlo simulations support the reported accuracy, with attention to both random and systematic sources of error. The appendix includes troubleshooting guidance for keeping the hardware calibrated and functioning.

• Foundations of the radiometer equation and the role of standard temperatures in noise measurements
• Design choices that enable reliable measurements without isolators at low frequencies
• A practical measurement sequence, calibration steps, and data interpretation
• How uncertainty is assessed, including Monte Carlo approaches and factor contributions

Ideal for readers of metrology, RF instrumentation, and thermal-noise measurement topics who want a concrete, hands-on look at a real-world system and its analysis.