How many blade antennas are used and what is their arrangement?

How many blade antennas are used and what is their arrangement?

• A. One blade antenna used for transmit only
• B. Two blade antennas, fore/upper and aft/lower
• C. Three blade antennas
• D. Four blade antennas

Answer: (B)

Two blade antennas are used, arranged fore/upper and aft/lower. This setup provides polarization diversity and broader coverage across the aircraft’s operating envelope. By placing one blade toward the front upper area and the other toward the rear lower area, the radiation patterns complement each other, reducing the chances of deep fades as the platform maneuvers and maintaining a more reliable Link 16 connection. A single blade would have more pronounced coverage gaps, while having two at opposite ends gives better continuity of link performance with minimal added complexity.

Two blade antennas are used, arranged fore/upper and aft/lower. This setup provides polarization diversity and broader coverage across the aircraft’s operating envelope. By placing one blade toward the front upper area and the other toward the rear lower area, the radiation patterns complement each other, reducing the chances of deep fades as the platform maneuvers and maintaining a more reliable Link 16 connection. A single blade would have more pronounced coverage gaps, while having two at opposite ends gives better continuity of link performance with minimal added complexity.