what is the difference between microwave frequency and extra low frequency? {elf}?

Question

what is the difference between microwave frequency and extra low frequency? {elf}?

Answer 1

Well, microwave is in the UHF band... or Ultra-High frequency range.



Frequency is the # of wavelengths that pass by per second... since light travels at the same speed regardless of frequency, higher frequencies = shorter wavelengths.

Answer 2

Connected to Short Wave Radio - well yes and no.



Here is the deal...



ELF is any kind of signals heard below about 20 Kilohertz all the way down to zero hertz.



VLF Radio is about 50 Kilohertz to 400 Kilohertz

AM Broadcast Band Radio is about 500 Kiloherts to

1600 Kilohertz

Shortwave Radio and Ham Radio runs from about 1.8 Megahertz

to 30.0 megahertz

Low Band VHF Radio runs from about 30 megahertz to 50

Megahertz with the 6 Meter Ham Band at 50 - 54 Mhz

Standard TV Low Channels run above 54 mhz to about 80 Mhz

FM Broadcast Band runs from 88 to 108 mhz

Aircraft AM Communications are 110 - 130 Mhz

2 meter Ham Band is 144 - 148 Mhz

High Band VHF Radio runs from about 150 to 175 mhz

Military Aircraft operate in 200 - 400 Mhz

70 CM Ham band runs from 420 to 440 Mhz

UHF Business Radio occupies 450 to 470 Mhz

Then there is more TV Channels on up to UHF TV

Cell Phones work in the 800 - 900 Mhz region



And microwave begins around 2000 mhz and goes up thru

some frequency ranges like 26,000 Mhz in allocated bands,

depending upon the type of service you're operating.



ELF can be used to detect the sounds of the Earth moving inside, if you speed up a recording so your ears can hear

the sound.



Microwaves are extremely short wavelength signals that operate on line of sight only. Special precautions must be used at those frequencies in dealing with transmission line losses. Special antennas are used that are unlike any short wave antennas

you normaly see. Microwave signals punch right through the Earth's atmosphere and keep on going.



ELF signals like to follow the densest mass, like running along under the earth, or following along the curve of the Earth's surface. ELF signals are VERRRRRRY long wave length and

need huge antennas for reception and transmission. Some under sea submarine trnsmitter stations use antennas that are fifty miles long I think.



So I hope that gives you the answers you were looking for.

ELF is the lowest frequency range of radio reception. Microwave is up at the top of the list in highest frequency of communications,

and the shortest range signals.

Answer 3

their all forms of rf or radio frequency waves,what you are refering to is the band width or the actual size of the wave itself.the general rule is the antenna length is the same as the wave length if the wave is 12 inches height than the antenna must be at least 12 inches long alsothere are some differances be tween am amplitude modulation and fm frequecy modulation but thats only for man made signalsmicro waves are at the high end of the spectrum and are very short elf or ulf is at the low end and very long waves.

Answer 4

extra low frequency is part of microwave frequency

u can just say elf is sub part of microwave frequency

so dont give more stress to ur mind dear

Answer 5

extra-low frequency (3-30 Hz)



microwave 1GHz - to 170 Ghz



completely diffetent sides of the spectrum

Answer 6

You really need a LOT more information than can be provided on Y!A. Consult an amateur radio handbook or a radio-frequency propagation guide, which can probably be found online.

Answer 7

ELF is 30 to 300 kHz

Microwave is above 500 MHz but below light



Try here --



http://www.altair.org/labnotes_RadioBands.html#tbB1

Answer 8

Here, let's try to see the 3 compared in the same unit:

ELF 3 Hz to 30 Hz

Shortwave 2,300,000 Hz to 26,100,000 Hz

Microwave 1,000,000,000 Hz to 170,000,000,000 Hz

Answer 9

Total other end of the fequency spectrum....Microwave in the Gigahertz range...ELF in the waaaay lower end