What kind of antenna is typically used in an aircraft's Instrument Landing System (ILS) marker beacon installation?

In an aircraft's Instrument Landing System (ILS) marker beacon installation, a balanced loop reception antenna is typically used due to its ability to provide reliable reception of the marker beacon signals. This type of antenna is specifically designed for low-frequency applications, which aligns with the frequency range used by marker beacons, typically around 75 MHz.

The balanced loop antenna is effective in creating a directional pattern, which helps in improving the signal-to-noise ratio and ensuring better performance in detecting the signals from marker beacons as aircraft descend during approaches. Its design allows the aircraft to accurately interpret position information relative to the ILS approach path.

While various types of antennas have their applications, the balanced loop reception antenna's characteristics make it especially suited for the specific requirements of an ILS marker beacon, accommodating the need for precise and clear reception in the aviation environment.