Concentrated wireless device providing operability in multiple frequency regions

A radiation booster arrangement for a radiating system configured to transmit and receive electromagnetic wave signals in at least a first frequency region, comprising:

• a first conductive part comprising a first connection point, defining a first internal port with a first connection point in a ground plane layer of a radiating structure of the radiating system;
• a second conductive part including at least one connection point defining a port with a connection point of the first conductive part;
• and
• a third conductive part including at least one connection point defining a port with a connection point of the first or second conductive part;
• wherein at least two of the first, second, and third conductive parts each has a maximum size smaller than 1/30 times a wavelength of a lowest frequency of the first frequency region;
• and
• wherein the first, second, and third conductive parts are adjacent to, and spaced apart from, each other in a linear arrangement and the second conductive part is connected to the ground plane layer only via the first conductive part.