Satellite communication is generally carried out for frequencies above

Options

A. 1MHz
B. 1kHz
C. 20 MHz
D. 20kHz

Answer

To solve the question regarding the frequencies used in satellite communication, we will analyze the information provided in the video transcript and apply our understanding of communication systems.

### Step-by-Step Solution:

1. **Understanding Satellite Communication**: Satellite communication involves the transmission of signals between a satellite in orbit and ground stations on Earth. This communication is essential for various applications such as television broadcasting, internet services, and military communications.

2. **Frequency Ranges**: Satellite communication typically operates at higher frequency ranges. The common frequency bands used for satellite communication include:
- **L-band**: 1 to 2 GHz
- **S-band**: 2 to 4 GHz
- **C-band**: 4 to 8 GHz
- **Ku-band**: 12 to 18 GHz
- **Ka-band**: 26.5 to 40 GHz

3. **Importance of High Frequencies**: The transcript mentions that to achieve effective satellite communication, high frequencies are necessary. High-frequency signals have several advantages:
- They can carry more data (higher bandwidth).
- They are less prone to interference and can penetrate the atmosphere more effectively.
- They allow for long-distance transmission without significant loss of signal quality.

4. **Conclusion**: Based on the information provided, satellite communication is generally carried out for frequencies above 1 GHz, with most operations occurring in the range of several gigahertz (GHz).

### Final Answer:
Satellite communication is generally carried out for frequencies above **1 GHz**.