For example if you want to transmit a song through FM, does the receiver's dish size actually increase the range in which he can detect these signals? if it does then how?
Electrical – How does the dish size increase reception range of radio signals
digital modulationfrequencyradio
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Looking at an HC-06 module:
what seems "odd" to me is the shape of the antenna. For 2.5 GHz I do not expect that a meandering shape like this (the gold colored part) is any good. My guess is that it is "designed" by someone who doesn't have a clue about antennas at 2.5 GHz.
Other 2.5 GHz antennas are often F-shaped or T-shaped. I saw another meander shape:
but note how is has two connection points, part of it is F-shaped.
My conclusion is that not much thought was put into the HC-06 module's antenna and that probably makes it a very poor antenna. So there's a lot of room for improvement, anything even remotely better will improve performance.
Power consumption wise you would not notice the difference. The actual RF power is quite low and insignificant compared to what the rest of the circuit (modem etc.) uses. Also with a bad antenna most of the RF power reflects back into the chip and is lost. A good antenna will radiate that RF power making things more efficient.
It is implemented using the so called Radio Data System (RDS). Which transmits the channel name, current song and more on a 57 kHz subcarrier.
Best Answer
A bigger dish is simply able to "catch" more of the power being sent through the air. A 100mm parabolic reflector could light a cigarette from sunlight. But it would take a 3m reflector to boil a liter of water.
As Tony Stewart cautioned, however, broadcast FM (down around 100MHz) is rather lower than most practical parabolic reflector dishes can operate at. Although there is a bit of reflection happening in many TV/FM antennas with those multiple rods in a long array, etc.