Precision Measurement of Microwave Thermal Noise
By James Randa
Precision Measurement of Microwave Thermal Noise by James Randa is, literally and figuratively, a textbook case of complete work. As clear and concise as the title, its 176 pages carry far more content than expected without being so dense the reader need dissect every word. Though every word surely carries purpose, it all comes together in a package that is helpful, frank and pleasantly anodyne.
Speaking of every word having purpose, let’s break down the title. Precision Measurement? I subscribe to the concept that “All measurement is wrong; we just need to know how wrong.” Plenty of time is dedicated to reference planes, calibration and error analysis, which is fantastic. Dr. Randa (whom I would consider to be a practical physicist) spans that analysis from mechanical issues all the way to quantum mechanics issues. Yes, this is precision measurement.
Next, Microwave. Let me preface by saying this book is ultimately discussing physics. The inclusion of the word “microwave,” especially in the context of a review in Microwave Journal, isn’t to be taken lightly. I’m happy to report that, while weighted heavily toward math and theory as opposed to laboratory experiments or design work, the institutional knowledge conveyed is extremely practical to our industry, especially as it relates to understanding amplifier measurement. Yes, this is microwaves.
Finally, Thermal Noise. This itself is a broad and complicated subject. Dr. Randa starts out with some Nyquist equations and the introduction may concern the reader of a hyper-focused discussion of quantum mechanics. Not that that would have been an issue, exactly, but he quickly establishes those equations as thetical to the mission and that while the literal thermal noise of a resistor is important, it’s not necessarily what amplifier designers are concerned with. Awesome, this book is exactly as the title advertises.
Now, let’s address why I think this is a complete work. The content is well-referenced from a variety of sources, but curious readers will note citations to many of Dr. Randa’s own works. Searching the internet for James Randa will paint the picture of a healthy career in this field at NIST and a recent retirement. There are a lot of esteemed careers in physics, most do not take the time out of retirement to catalog their life’s work. So, let’s say this clearly — the industry, the current generation of microwave engineers, and future generations of microwave engineers, we thank you.
Reviewed by:
Brian Rautio, Sonnet Software
ISBN: 978-1-119-91011-4
176 Pages
To order this book contact:
Wiley-IEEE Press (14 November 2022)
www.wiley.com