Adapter device and method for measuring the signal power in a coaxial connection

An RFID reading device that has a second device and a coaxial connection to the second device and at least a first adapter device whose first coaxial connector and second coaxial connector are deployed in the coaxial connection, wherein the first adapter device is arranged at an end of the section of the coaxial connection to be measured remote with respect to the RFID reading device, wherein the first adapter device has the first coaxial connector and the second coaxial connector for deploying the adapter device in the coaxial connection and a measuring unit that is configured to determine the signal power of a signal propagating from the first coaxial connector to the second coaxial connector and/or vice versa,

• wherein the first coaxial connector and the second coaxial connector are releasable so that the adapter device can selectively be deployed in the coaxial connection or can be removed therefrom.

A method of measuring the signal power in a coaxial connection from an RFID reading device to a second device, by means of at least a first adapter device whose first coaxial connector and whose second coaxial connector are releasably deployed in the coaxial connection, wherein the RFID reading device starts a measurement of the signal power, the first adapter device thereupon determines the signal power of a signal of the RFID reading device propagating through the first adapter device, and the RFID reading device then reads a measured value of the first adapter device.