Active, planar wide band aerial sensor for microwave range - has wide elongated slot with slot resonance on substrate surface

摘要

The sensor consists of an elongated slot formed by etching etc. of the basic metalising on one substrate surface. The resonance. On the substrate surface is formed a cavity, in which is deposited a first microstrip conductive structure, coupled to a second microstrip conductive structure on the same substrate. The cavity has a resonance influenced by the first microstrip conductive structure, this resonance pref. not coinciding with the slot resonance. A lower side of a second substrate is typically fully metallised, with free cuts for leads. The second substrate top surface is pref. free of metallising. ADVANTAGE - Frequency stability, high sensitivity, low-cost, and small power requirements.