MMIC based future generation MLS phase-array antennas

Microwave Landing System
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(MLS) is a new standard system endorsed by the International Civil Aviation Organization (ICAO) to replace Instrument Landing Systems (ILS) now in general use. MLS operates at C-Band which permits ranges up to 30 nautical miles to be reliably achieved with modest transmitting powers. With MLS's, ground transmitters provide signals that can be decoded in an aircraft to determine both range, and azimuth and elevation angles of approach. The information is time-multiplexed with additional digital data to provide information such as airport and runway identification, wind vectors, site data, system status, and other operational details.