Portable directional antenna, measurement arrangement and measurement method

A measurement arrangement comprising:

• a portable directional antenna, which is designed to detect position-finding data of an interference source emitting an electromagnetic interference signal, comprising an installed camera which is configured to capture image information from the surroundings of the directional antenna, in particular from the surroundings of the interference source,
• a control device configured to control the camera and the portable directional antenna, wherein the control device is configured to adjust the size of the opening angel of the directional antenna to become smaller or bigger, and
• a measurement device designed as a spectrum analyser which is coupled to the directional antenna and which is designed to analyse an electromagnetic interference signal received by the directional antenna,
• wherein the control device is coupled to the camera and is designed so as to trigger the camera in a manner dependent on a predetermined condition,
• wherein the control device is designed to trigger the camera automatically in a manner dependent on the predetermined condition, the predetermined condition denoting at least one threshold for the detected electromagnetic signal, and
• wherein the threshold for the detected electromagnetic signal is a threshold for the scattering of the detected electromagnetic interference signal.

A method for locating a radio-frequency interference source, comprising:

• adjusting the size of an opening angle of a directional antenna to become smaller or bigger,
• determining the position of an interference source by detecting and analysing an electromagnetic interference signal emitted by the interference source via the directional antenna and by providing position-finding data based on a direction of incidence of the detected electromagnetic interference signal;
• determining the presence of a predetermined condition, the predetermined condition denoting at least one threshold for the detected electromagnetic signal, wherein the threshold of the detected electromagnetic signal is a threshold for the scatting of the detected electromagnetic interference signal;
• dependent on the determined presence of the predetermined condition, automatically capturing image information from the surroundings of the interference source or from the location at which the electromagnetic interference signal was detected;
• and
• storing the determined position and the associated image information.