Why Modulation is Important to Reduce Height of Antenna?

Answer: Modulation is important for reducing the height of antennas primarily because it allows for the efficient transmission of signals over long distances while minimizing the physical size of the antenna required.

Modulation is important for reducing the height of an antenna for a few key reasons:

1. Frequency Utilization: In modulation, these changes can be amplitude or frequency variations, or phase differences, depending on the data signal. With a high-frequency carrier signal, the transverse signal wave is divided to reduce its wavelength. The closer frequencies are to each other, the shorter the wavelength becomes. This means a shorter antenna length for the transmission to be received within the channel.
2. Practical Antenna Size: Consequently, the size of an antenna is usually proportional to the range or frequency of the wave it is used for. A tall and large antenna is necessary for high efficiency in case of a long wavelength when the frequency is low. This is made possible only if a high-frequency carrier signal is used, and this can be achieved by modulation so that it becomes smaller and more convenient to use it.
3. Better Performance: The short-type antennas will be more convenient in terms of placement and building compared to the other ones. They might also have superior effectiveness which manifests in energy savings and bandwidth performance for particular domains.
4. Compatibility: With modulation, numerous devices ranging from phones, and computers to devices with audio outputs can communicate properly. Now devices like cell phones could have antenna that are smaller and can operate at higher frequencies, while the shorter antennas allow them to fit in small designs.