From somebody who hasn't had physics 2 in 10 years this is a great refresher!
Minor correction after running the math:
"In contrast, a 1 GHz signal has a wavelength of 0.1 m (less than 1 foot). "
1GHz in vacuum is 0.3m = 30cm = less than 1 foot
Blog Make a Frequency Plan Tom Burke 17 comments When designing a printed circuit board, you should develop a frequency plan, something that can be easily overlooked. A frequency plan should be one of your first steps ...