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benz
  Coherence can make a big difference Sometimes The Fates of Measurement smile upon you, and sometimes they conspire against you. In many cases, however, it’s hard to tell which—if either—is happening. More often, I think, they set little traps or tests for us. These are often subtle, but nonetheless important, especially when you’re trying to… (Show more)
benz
  A quick, intuitive look at what will make them challenging Noise is fundamental in much of what RF engineers do, and it drives cost/performance tradeoffs in major ways. If you’ve read this blog much, you’ve probably noticed that noise is a frequent focus, and I’m almost always working to find ways to reduce it. You’ve also noticed that I lean… (Show more)
benz
  If you're going to optimize it you have to quantify it   Note from Ben Zarlingo: This is the second in our series of guest posts by Nick Ben, a Keysight engineer. Here he turns his attention to the fundamentals of noise figure.   In the previous edition of The Four Ws, I discussed the fundamentals of spurious emissions. This time I’m discussing… (Show more)
benz
  Handling the frequency and bandwidth challenges of 5G, radar, and more 5G technologies and markets are much in the news these days, and for good reasons. The economic potential is large, the opportunities are relatively near-term, and the technological challenges are just the kind of thing RF engineers can get excited about. Whether your focus… (Show more)
benz
  As technologists, we need ways to tell the difference Over the past few months I’ve been hearing more about a propulsion technology called an EM Drive or EMDrive or, more descriptively, a “resonant cavity thruster.” As a technology that uses high-power microwaves, this sort of thing should be right in line with our expertise. However, that… (Show more)
benz
  Refining your design and creating happy customers   Note from Ben Zarlingo: I invite you to read this guest post by Nick Ben, a Keysight engineer. He discusses the what, why, when and where of spurious emissions before delving into the importance of identifying them in your device’s transmitting signal and thereby improving your product design.… (Show more)
benz
  Electrical engineers lead the way Years ago, a manager of mine seemed to constantly speak in analogies. It was his way of exploring the technical and business (and personal!) issues we faced, and after a while I noticed how often he’d begin a sentence with “It’s like...” His parallels came in a boundless variety, and he was really creative in… (Show more)
benz
  The difference can be anything from 0 dB to infinity Most RF engineers are aware that signal measurements are always a combination of the signal in question and any contributions from the measuring device. We usually think in terms of power, and power spectrum has been our most common measurement for decades. Thus, the average power reading at a… (Show more)
benz
  Good news about RBW, noise floor, measurement speed, and finding hidden signals Some things never change, and others evolve while you’re busy with something else. In recent years, RF measurements provide good examples of both, especially in signal analysis fundamentals such as resolution bandwidth filtering, measurement noise floor, and speed or… (Show more)
benz
A few months ago, Keysight’s Brad Frieden and I both wrote about downconversion and sampling, related to wireless and other RF/microwave signals. Brad's article in Microwaves & RF appeared about two weeks before my blog post, though I somehow missed it. His main focus was on oscilloscopes and improving signal-to-noise ratio (SNR) in measurements… (Show more)
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