to shift the frequency of information signal ,at the frequency domain to a higher frequency ...so the information can be transmitted to the receiver.
Following are the 3 parameter by which high Frequency carrier can be varied by low frequency intelligence signal 1) Amplitude 2) Phase 3) Frequency
Transmission bandwidth depends on modulating signal frequency and carrier frequency
communications channel
In an underground cable, the distortion in the transmission of carrier frequency can be eliminated using inductive loading. This distortion causes a delay which will result into a variance of frequencies.Ê
Some advantages are:As the frequency increases, the so does the data transfer speeds.The gain and directivity of the transmission antenna will increase for the the same size.Although signals experience more attenuation at high frequency, this could be advantageous for covert purposes.Ultimately, each band has certain limitations, depending on what the FCC has them dedicated for. So higher frequency could be great, but could be power limited.
audio frequency
Following are the 3 parameter by which high Frequency carrier can be varied by low frequency intelligence signal 1) Amplitude 2) Phase 3) Frequency
One method to extract the intelligence (signal) from a high frequency carrier in FM receivers is with a phase locked loop.
Higher the frequency, higher the losses.
No. Gravity effects its' orbit but not its' transmission frequency.
Frequency modulation is not used for long distance transmission because it has the problem of limited band width.
Transmission bandwidth depends on modulating signal frequency and carrier frequency
Ultrasonic frequency has been shown to be effective for repelling female mosquitoes. It reportedly works within one meter of the insects.
If the intelligence signal striking a microphone was doubled in frequency from 1 kHz to 2 kHz with constant amplitude, (fc) would change from 1 kHz to 2 kHz. Because the intelligence amplitude was not changed, however, the amount of frequency deviation above and below fc will remain the same. On the other hand, if the 1 kHz intelligence frequency were kept the same but its amplitude were doubled, the rate of deviation above and below fc would remain at 1 kHz, but the amount of frequency deviation would double.
at microwave frequency why should the transmission line may considered to be made of unit length?
Velocity (relative and absolute), medium of transmission, ...
increasing its frequency