If you are interested in a piece of microwave history, one could look no further than the RadLad series of papers. This is an interesting bit of arcana- mainly because the research was released into the public domain, via MIT. However, there appears to be some corporate skullduggery at play, and the files were no longer hosted by MIT and have since been privately published. I’m not sure how something that once was public domain isn’t any longer- in any case, that seems to be the issue here. Grab the paper while you can.
W4TI- Whiskey Four Tall Indians
Amateur Radio in Atlanta