NETW563 Antennas and RF

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NETW563 Antennas and RF
All forms of electromagnetic energy, from gamma rays to radio waves…

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NETW563 Antennas and RF

NETW563 Antennas and RF

Course Discussions Week 1 All Students Posts – 27 Pages 

All forms of electromagnetic energy, from gamma rays to radio waves, travel through space in waves. How are radio waves generated, and how do they propagate? Discuss the physical differences between radio waves and light or heat waves.  What is polarization? What is the concept of wave propagation?

Radio waves are generated by the electromagnetic field being sent through the antenna or dish in pulses.  Once the current is stopped then the signal stops. When it is started up and stopped repeatedly then that is when you start to see the waves transmit.

Radio waves can cover almost any distance depending on the frequency and the angle of the dish and power output.  It can bounce inside the atmosphere until a destination is reached forever.
I have used HF to talk to Japan from NC as it can bounce over mountains.  I have also used UHF to for short wave sorta far distances but it does not bounce as much as just flex a bit and VHF which is basically line of sight only without any interference in the way to stop it.

Light does not bend in the traditional manor. It can be manipulated through fiber wires but the waves can be directional through reflection, refraction and diffraction…