Instrument landing system (ILS) is a series of subsystems that are useful to facilitate the aircraft to be able to land on the runway properly. One of these sub systems is marker beacons. Marker beacons on the Instrument landing system are tools to help landing planes. Aircraft have critical condition which lead to accidents and there a big number of accidents occur under these critical condition. This condition is the takeoff and landing position.
ILS Marker Beacons are very complex built and integrated with the Radio Altimeter, and Distance measuring equipment (DME) also the real device needs a long process of work. Therefore, this thesis simplifes the work of the Marker Beacon system without being integrated by the other system therefor the prototype can be perfectly simulated as the real device in the aircraft. This thesis performs a computer simulation using PROTEUS 8 PROFESSIONAL, and conduct a laboratory experiment using Oscilloscope.
This thesis expects the simulation results to be the same as the actual procedures and systems in the actual marker beacons with near-perfect results of 60 – 90% for which the results are acceptable, altough the final result for this research reach data Frequency 75 MHz , VSWR 1,5, VPP 276mV, Radiation Pattern directional, Bandwidth in 8.98 dB and dB polarization in 37.84 dB