A LEVEL SENSING DEVICE

摘要

A level sensing device (35) comprises a high frequency radar system. The system comprises a radar high frequency module (48), a carrier board and a controller (54). The radar high frequency module is mounted on the carrier board using surface mount techniques. The controller comprises a processor and the radar high frequency module comprises a plurality of components including one or more microwave integrated circuits (23), a radiating patc h antenna (30), and coupling means (29) for channelling a radiated signal from the patch antenna out of the module. The components are encapsulated to form the module and the coupling means comprises a dielectric rod.