In an evaluation method for a particle counter, a detector generates a signal in response to the presence of particles in a measuring area in which a liquid flow is conveyed. The device can comprise one or more field effect transistors that each include at least one channel contact to a central region of the device channel of the FET. The method further includes analyzing the synchronized aggregated data in the drilling context to generate an analysis and presenting the analysis to at least one user. Thus, a small circularly polarized antenna with a hemispherical pattern for high frequency or satellite applications is achieved.