I am a bit of a novice in the field of RF design, and I was looking around for an RF module to use in a project. I kept on noticing the ESP8266, which is pretty popular with hobbyists, but it's something that doesn't seem to be used in commercial products, and I can't buy the chip by itself from big suppliers like Digikey or Arrow. Why is this?
Also, I noticed that the assembled esp8266 module has way fewer passives on the antenna output from the chip than other boards. How can they do that? I didn't think that on-chip inductors could be large enough to meet the requirements of rf designs.