A portable antenna system includes an antenna that is substantially defined by one or more portions that include electrically conductive self-similar extensions. It includes a detection cell that provides an indication of an amount of analyte present in the gas, and a valve having a closed position, a sample gas position, and a calibration gas position. Also included is a method comprising transmitting a radio bearer reconfiguration message, receiving a plurality of cell measurement reports, receiving a radio bearer reconfiguration complete message, and updating a plurality of AS cells using the combined cell measurement reports. In a further aspect the invention provides a high throughput apparatus for communicating the presence of a target radionuclide in a sample volume, the identity of a target radionuclide in a sample volume, or both to appropriate personnel.