# relation between energy and frequency

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#### devil6600

##### Full Member level 5
hi

can any one tell me what is the relation between energy and frequency. basically i wanted to know that if we transmit a signal at 100Mhz and a signal at 1Ghz then which will consume more power for transmitting the signal for same distance.

thanks

#### Andrew8611

##### Member level 1
Depending on the frequency components of the signal there can be more or less energy according to parseval's theorem. A 1 GHz will consume more energy because it has more frequency components than the other signal, but there are modulation techniques for these inconvenients.

devil6600

### devil6600

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#### syeda amna

##### Full Member level 4
Energy and frequency has direct relationship. As signal frequency increases more energy wastes during transmission. For 1 GHz signal more energy waste as 100 MHz

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devil6600

### devil6600

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#### krishna1234

##### Member level 2
higher frequencies have higher energy level compared to lower frequencies.so higher frequencies can sustain for long distances compared to lower frequencies.so high frequencies used to transmit signals.you have to give more energy to transmit 1ghz compared to that of 100mhz.but 1ghz have less distortion compared to that of 100mhz.

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### devil6600

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S

#### Sckoarn

##### Guest
The energy of a frequency is

E= pf where p is Planks constant and f is the frequence.

Depending on the application, you may be able to get away with lower "power" for the higher frequencey if you can use a directional antena.

#### andre_luis

##### Super Moderator
Staff member
Depending on the application, you may be able to get away with lower "power" for the higher frequencey if you can use a directional antena.

Exactily

Some satelites works with few watts only, due parabolic antennas.

+++

devil6600

### devil6600

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#### bluehole

##### Full Member level 6
hi

can any one tell me what is the relation between energy and frequency. basically i wanted to know that if we transmit a signal at 100Mhz and a signal at 1Ghz then which will consume more power for transmitting the signal for same distance.

thanks
see this wiki page
Energy of electromagnetic radiation = planks constant multiplied by frequency.
so higher the frequency higher the power of the radiation.

But for transmitting over a distance is another thing.
The Power loss is in a logarithmic scale.

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