The present invention relates to a receiving apparatus (1; 10; 20) adapted to receive high frequency image signals, comprising two or more receiver channels, each receiver channel comprising an antenna pattern (2) comprising several antenna elements (3), said antenna elements (3) adapted to receive high frequency image signals, a receiving means (4) adapted to process the high frequency image signals received by said antenna elements (3) into baseband signals, analog-to-digital conversion means (7) adapted to convert the baseband signals from the receiving means (4) into digital signals, and phase shifting means (8) adapted to phase shift the digital signals, said receiving apparatus (1; 10; 20) further comprising combining means (9) adapted to combine the phase shifted digital signals from the receiver channels into combined signals. The invention further relates to a corresponding receiving method, as well as an imaging apparatus and method.