Apparatus with a waveguide and an antenna

摘要: An antenna connected to a waveguide can be used for level measurements of bulk material by measuring the reflection microwave radiation radiated towards surface material. Condensate droplets forming on may produce higher modes and echoes in signal. The effect caused ameliorated increasing size waveguide. To obtain usable measurement signal, compromise between reducing interference from condensate optimizing electrical characteristics has found. invention is directed which designed propagate at particular frequency only fundamental mode, while itself capable supporting order modes. A taper dimensioned so as transmit mode placed antenna. At frequency, causes waveguide/antenna combination operate spite multimode