A signal distribution network for an N-port antenna arrangement. The signal distribution network comprises first circuitry for receiving at least one input signal and implementing splitting of the at least one input signal into N/2 output signals, where N>1. The signal distribution network comprises second circuitry for providing N output signals to a respective antenna port and implementing splitting of N/2 input signals into the N output signals. The signal distribution network comprises switching circuitry, the switching circuitry being operatively connected between the first circuitry and the second circuitry, the switching circuitry implementing selectable connectivity between the first circuitry and the second circuitry such that the N/2 output signals of the first circuitry are provided as the N/2 input signals of the second circuitry. The signal distribution network comprises control circuitry configured to control the switching circuitry so as to selectively connect outputs of the first circuitry to inputs of the second circuitry, thereby selectively directing the N/2 output signals through the switching circuitry.