Since via the feed networks (10) the amplitude relations of the sent and received signals of the individual antennas are known precisely and additionally via the phase controllers the phase position of each of these signals can be determined precisely, the antenna diagram of the antenna array in every state of the antenna array (that is, even at any arbitrary time) is determined entirely deterministically.
If the requisite computation power is available in the microprocessor (11) or at some other point in the antenna system, it is therefore even possible to calculate the entire antenna diagram analytically at every time with very high precision. Particularly with a view to the regulatory conformity of the antenna diagram typically required in civilian applications, this represents a substantial advantage of arrangements according to the invention.
Even if the antenna arrays contain several thousand individual antennas, as is typically the case for instance in the frequency range above 10 GHz, it is possible with the aid of a Fast Fourier Transform (FFT) for the corresponding antenna diagram to be calculated very precisely with relatively little computation power. Correspondingly fast FFT algorithms are well known.
The embodiments described of