How radio transmitter and reciever works

Radio transmitters and receivers work together to enable wireless communication by transmitting and receiving radio waves. Here's an overview of how they work:

Radio Transmitter

1. Information Source: The transmitter starts with an information source, such as an audio signal (voice or music), a digital data stream, or a video signal.

2. Modulation: The information source is used to modulate a carrier wave. Modulation involves varying one or more properties of the carrier wave (typically amplitude, frequency, or phase) to encode the information. The type of modulation depends on the specific communication system (e.g. AM, FM, digital modulation).

3. Amplification: The modulated signal is then amplified to increase its power to a level suitable for transmission. This amplification ensures that the signal can cover long distances.

4. Frequency Conversion: In some cases, the transmitter may perform frequency conversion to move the modulated signal to the desired frequency band for transmission.

5. Antenna: The final modulated and amplified signal is fed into an antenna. The antenna radiates the radio waves into the surrounding space or through a transmission medium, such as a coaxial cable or optical fiber.

6. Transmission: The radiated radio waves or signals are transmitted into the air and propagate outward from the antenna. These radio waves carry the encoded information and can travel over a variety of distances, depending on their frequency and power.

Radio Receiver

1. Antenna: The receiver starts with an antenna that captures the incoming radio waves, whether they are transmitted over the air or received through a cable or fiber.

2. Demodulation: The received signal is sent to the demodulator, which reverses the modulation process applied by the transmitter. The demodulator extracts the original information from the incoming signal by detecting changes in amplitude, frequency, or phase.

3. Filtering: After demodulation, the receiver may use filters to remove unwanted noise and interference from the signal, ensuring that only the desired information remains.

4. Amplification: The demodulated signal is often weak, so the receiver amplifies it to a level suitable for further processing.

5. Decoding: If the transmitted information was digitally encoded, the receiver performs decoding to recover the original digital data. This is common in modern communication systems like cell phones and Wi-Fi.

6. Output: Finally, the receiver sends the recovered information to an output device, such as a speaker for audio signals, a screen for video signals, or a computer for data signals.

Communication: With the information recovered and processed, it can be utilized for various purposes, including listening to audio, watching videos, browsing the internet, or performing any other communication or data transfer tasks.

Typical frequency at which FM radio stations transmit signals

The typical frequency range for FM (Frequency Modulation) radio stations in city areas like Brisbane, Australia, and Pune, India, falls within the FM band, which spans from 88.0 MHz to 108.0 MHz. However, the specific frequencies used by individual radio stations within this band can vary.

In both Brisbane and Pune, you can find FM radio stations operating within this frequency range. Common FM frequencies in these cities may include 88.0 MHz, 89.0 MHz, 90.0 MHz, and so on, with increments of 0.1 MHz. For example, you might come across radio stations broadcasting at 88.0 MHz, 88.1 MHz, 88.2 MHz, and so forth.