As is always the case, we've been busy adding plenty of new stuff to Microwaves101. We ain't been slack, Cap'n Walker!

New for April/May 2021: Sorry we missed a month with our newsletter.  Got the vaccine, sold a house, had an unrelated trip to the ER... glad to be alive! The International Microwave Symposium is coming up in early June. Is your company planning on sending a booth, or even any people? Take our survey here, please.  

Meanwhile, what's new at Microwaves101?

  • IMS2021 is part live and part virtual.  Read about it here. The exhibitor floorplan shows that maybe 1/2 the available space will be filled. Our booth number is 1544, across from Hyperlabs and next to West Bond. Hopefully we'll see you there!

  • We have a new page on a new IEEE publication, IEEE Journal of Microwaves. Unlike most IEEE materials, this is a free publication, you can download the articles even if you are not an IEEE member. Check it out, follow our link and download articles from the Winter 2021 first edition. Topics include history of automotive radar, info on silicon-based phased arrays, microwave imaging in security and much, much more. 

  • We added "mushroom factory" to our slang dictionary, thanks to David.

  • We added a cure for the HMC635 amplifier instabilities, which is featured on our unstable amplifier page. It only took ten years for someone to ask us how we did it!

  • On our 5G page, there is a link to a recent article on the competition for fastest 5G networks around the world.  Thanks to Fern!

  • We have new content on time domain reflectometry (TDR). There's a page on classic TDR, which we updated in our April video newsletter. And there's a page on time domain analysis using frequency data. So far, the latter page only has a brief history of the topic.

  • Speaking of time domain, we added Marion Hines and Harold Stinehelfer into our Hall of Fame for giving birth to the concept of using the Fourier transform on S-parameters to show time domain response of networks and be able to get some value out of the resulting squiggles. Harold Stinehelfer even tried to build a business out of it.

  • In the 1980s you could get away with a lot more fun things that you can now.  For instance, if you made this poster today, you would be hauled into Human Remains for using a negative stereotype.  Maybe you should not look at the poster, it will hurt too much. But if you are brave enough, the first person to identify at least half of the people in the very naughty poster will receive a gift of $50!

  • We have some new content on large coax cut-off frequencies.  Yes, coax is available in outer diameters of more than nine inches, in the broadcast industry.  Thanks to Gray, we have posted standard "jumbo" sizes and their cutoff frequencies. For his coaxial contribution, Gray is our Microwaves101 pocketknife awardee this month!

  • We have some new content on TRL calibrations, thanks to some discussion with Laurens.  We had previously stated that you will want to make the "launches" on a TRL cal standard as short as possible, and he wanted to know why.... It's based on experience, not in any app notes.  Feel free to tell us if you agree or disagree about anything you read on our site!

  • We're always fixing typos and making fixes of one kind or another. We fixed our Marchand  balun page thanks to John C. Figure 13, the impedance variation across frequency, was incorrectly annotated.  Notice something not-quite-right? Let us know!

  • Meanwhile, on our discussion board, we've got some questions that need YOUR answers,  A professor wants help on plotting time domain and frequency domain responses together (notice a theme this month?)  Here's discussion about how attenuators are built.  We offered some assistance in finding obsolete  diodes, and we fielded a question on circular waveguide dimensions (thanks. Uli!)  Any inputs on plating plastic parts would be appreciated here.  Pop on over to the discussion board to register and sign in, then chime in on existing threads, or start your own topics. Our new user approval process is quick and anonymous, blocks most bots, and eliminates spam by more than 99%. At least that's what the sales rep told us...

Attention forward thinking microwave marketeers: check out information on advertising with us. Sponsorship information is but a click away...

As always, we want you to sign up for the MW101Stuff newsletter, or submit a photo for our Microwave Mortuary. We'd love to hear from you, whether you have nice things to say about or just want to tell us how we've ruined your life.