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Wireless for the Internet of Things
Gerard Borg
Research School of PhysicsCollege of Engineering and Computer Science
Australian National University
http://users.cecs.anu.edu.au/~Gerard.Borg/anu/teaching.html
Electromagnetic WavesFrequency - MHz, Wavelength – meters
Frequency x Wavelength = 3 x 108 m/s (?)
Frequency = f, Radian frequency = 2pf , Wavelength = l
88-108MHz 520 820MHz477MHz
AM radio
1MHz
CB radio
148MHz
Amateur radio
VHF TV
150-152MHz 915-928MHz433MHz
Weak Signal Propagation and Reporting Network (WSPR)
http://users.cecs.anu.edu.au/~Gerard.Borg/anu/projects/amateur/wsprnet/wsprnet.html
It's aim is to encourage experimentation and technical development among clubmembers in the area of high-altitude balloonpayload development.