Frequency for Greater Wireless Range

[Infinytus]

Hi,

Why is it that we use lesser RF frequency band to get better wireless transmission range in presence of obstructions ? Whats the reason behind it?

I was thinking the other way round. If the frequency of the signal is higher, then the signal owing to higher energy will travel larger distance in presence of obstructions.

Thank you.

 

[pranam77]

As the frequency goes high, shorter will be the wavelenght and thus the antenna and thus more the communications in fringe areas. For Eg If a 144 Mhz Transmitter of 5 watt communicates to a distance of say 15 Kms, a 7Mhz transmitter with 5 watts can communicate to more than hundreds of Kms.
Lesser the frequency more the wavelength and thus is the antenna.

 

[Infinytus]

Thanks pranam77 !