Frequency Req 3 Introduction to the Electromagnetic Spectrum

Frequency Req. 3: Introduction to the Electromagnetic Spectrum 1 cycle per second Electromagnetic = 1 Hertz Spectrum or = 1 second 9 Hertz SLIDE 1 12 6 5 4 3

Wavelength • Longer wavelengths • Lower frequencies • Lower energy 1 1 2 Req. 3: Introduction to the Electromagnetic Spectrum 3 • Shorter wavelengths • Higher frequencies • Higher energy SLIDE 2 12 8 7 6 5 4 3

Req. 3. a. : Electromagnetic Spectrum MF 300 k. Hz HF 3 MHz MEDIUM Get FREQUENCY out 1 MHz 2 MHz your notes! 3 MHz HIGH FREQUENCY 10 MHz 20 MHz 30 MHz Let’s start drawing VERY HIGH FREQUENCY the spectrum ULTRA HIGH FREQUENCY VHF 30 MHz 100 MHz 200 MHz 300 MHz 1 GHz 2 GHz 3 GHz UHF 300 MHz SLIDE 3 167 5 4 3 2

Req. 3. b. : Electromagnetic Spectrum ELF Extremely Low Frequency SLF Super Low Frequency ULF Ultra Low Frequency VLF Very Low Frequency LF Low Frequency MF Medium Frequency HF High Frequency VHF 3 Hz 300 Hz 3 k. Hz 300 k. Hz 3 MHz 30 MHz Very High Frequency 30 MHz 300 MHz UHF Ultra High Frequency 300 MHz 3 GHz SHF Super High Frequency 3 GHz 30 GHz EHF Extremely High Frequency 30 GHz 300 GHz THF Tremendously High Frequency 300 GHz 3 THz SLIDE 4 12 4 3

MF 300 k. Hz AM Broadcast 160 M Req. 3. c. : Radio Services Marine 1 MHz 2 MHz 3 MHz 10 MHz 20 MHz 30 MHz 100 MHz 200 MHz 300 MHz 1 GHz 2 GHz 3 GHz HF 3 MHz VHF 30 MHz UHF 300 MHz SLIDE 5 12 4 3

3 MHz 2 MHz CB 3 MHz 12 M 17 M 20 M 30 M 40 M 1 MHz 60 M HF 80 M 300 k. Hz Marine 10 M AM Broadcast 15 M MF 160 M Req. 3. c. : Radio Services 10 MHz 20 MHz 30 MHz 100 MHz 200 MHz 300 MHz 1 GHz 2 GHz 3 GHz VHF 30 MHz UHF 300 MHz SLIDE 6 12 3

1 MHz AVIATION CB 12 M 17 M TV 30 MHz 1. 25 M FM WEATHER TV VHFHIGH TV 3 MHz 20 MHz 2 M 6 M VHFLOW 30 MHz 20 M 10 MHz 3 MHz VHF 2 MHz 30 M 40 M 60 M HF 80 M 300 k. Hz Marine 10 M AM Broadcast 15 M MF 160 M Req. 3. c. : Radio Services 100 MHz 200 MHz 300 MHz 1 GHz 2 GHz 3 GHz UHF 300 MHz SLIDE 7 12 7 6 5 4 3

1 GHz 30 MHz 200 MHz 12 cm 300 MHz 13 cm 2 GHz CB 12 M 17 M WEATHER TV 23 cm 33 cm CELL PHONES FRS/GMRS TV VHFHIGH AVIATION 100 MHz 70 cm 300 MHz FM TV 3 MHz 20 MHz 2 M 6 M VHFLOW TV 30 MHz UHF 20 M 10 MHz 3 MHz VHF 2 MHz 30 M 40 M 60 M 80 M HF 1 MHz 1. 25 M 300 k. Hz Marine 10 M AM Broadcast 15 M MF 160 M Req. 3. c. : Radio Services 3 GHz SLIDE 8 16 5 4 3 2

300 MHz 1 GHz 200 MHz 10 M 12 cm 300 MHz 13 cm 2 GHz CB 30 MHz 1. 25 M WEATHER TV 23 cm 33 cm CELL PHONES 70 cm FRS/GMRS 100 MHz TV 12 M 17 M 20 M AVIATION VHFHIGH FM TV 3 MHz 20 MHz 2 M 6 M VHFLOW TV 30 MHz UHF WWV 10 MHz 3 MHz VHF 2 MHz 30 M WWV 40 M 60 M WWV 80 M HF 1 MHz 15 M 300 k. Hz Marine WWV AM Broadcast WWV MF 160 M Req. 3. c. : Radio Services 3 GHz SLIDE 9 12