6. Classify the antennas related to applications & band of frequencies.

Antennas can be classified based on their applications and band of frequencies. Here are some examples:

1. Broadcast Antennas: These are used for transmitting television and radio signals. They operate in the Very High Frequency (VHF) and Ultra High Frequency (UHF) bands.

2. Satellite Antennas: These are used for communication with satellites. They operate in the Super High Frequency (SHF) and Extremely High Frequency (EHF) bands.

3. Cellular Antennas: These are used for mobile communication. They operate in the Ultra High Frequency (UHF) band.

4. WiFi Antennas: These are used for wireless internet connections. They operate in the Ultra High Frequency (UHF) and Super High Frequency (SHF) bands.

5. Radar Antennas: These are used for detecting the position and velocity of objects. They operate in the Super High Frequency (SHF) and Extremely High Frequency (EHF) bands.

6. GPS Antennas: These are used for receiving signals from GPS satellites for navigation purposes. They operate in the Ultra High Frequency (UHF) band.

7. HF Antennas: These are used for long-distance communication, especially in remote areas. They operate in the High Frequency (HF) band.

8. RFID Antennas: These are used for tracking and identification purposes. They operate in the Ultra High Frequency (UHF) band.

9. Bluetooth Antennas: These are used for short-range wireless communication. They operate in the Ultra High Frequency (UHF) band.

10. NFC Antennas: These are used for near-field communication, such as contactless payment systems. They operate in the High Frequency (HF) band.