Christopher Bowick and his book RF Circuit Design have been helping people understand the intricacies of RF design for almost 25 years. Well, Mr. Bowick has stepped it up a notch by creating a second edition with new information. The following synopsis of the book mentions the new areas covered by the book.
"RF circuit design is now more important than ever as we find ourselves in an increasingly wireless world. Radio is the backbone of todays wireless industry with protocols such as Bluetooth, Wi-Fi, WiMax, and ZigBee. Most, if not all, mobile devices have an RF component and this book tells the reader how to design and integrate that component in a very practical fashion."
I bet most members are saying, sure another really boring or over the top book that only totally geeked out RF nuts like myself would like. Maybe, but I thought I would at least allow people who are even the least bit interested a chance to see for themselves. It so happens, RF DesignLine has published excerpts from various chapters of the book, starting with "Understand Radio Architecture, Part1". There are five excerpts in total, each describing a certain aspect of RF design. Just reading these alone is well worth the time. For example, I included a section where the author talks about the relationship between noise factor and the signal to noise ratio:
"Front-end receiver components are characterized in terms of noise by several parameters, including noise figure (NF) and noise factor (F). For the receiver as a whole, the noise factor is simply a ratio of the SNR at the output of the receiver compared to the SNR at the source of the receiver. For each component, similarly, the noise factor is the ratio of the SNR at the output to the SNR at the input. The noise figure is identical to the noise factor, except that it is given in dB."
While at this Web site and on the topic of RF propagation, I thought it might be beneficial to point out another quality article written by Ryan Winfield and Mark Gerrior, "Avoiding Interference in the 2.4 GHz ISM band." The RF environment, especially the 2.4 GHz frequency band, is seeing an increasing amount of what could be called RF pollution and noise. The article goes beyond the normal "what is wrong" in that it explains the new technology equipment designers are trying to incorporate into BlueTooth, Wi-Fi, and ZigBee products to reduce the detrimental effects of interference.
Final thoughts (and I moved)
I normally like to give a fresh perspective on topics, but these articles are very well written by experts, so I thought it best not to meddle.
I also wanted to mention that, in order to better serve the members, TechRepublic has realigned the wireless networking and infrastructure blog to be a subset of the Network Administrator blog. It is a special privilege to be among some very sharp writers in this section. I hope I can live up to their standards. Its pretty exciting to be able to write about both wired and wireless networking.