A measurement arrangement for measuring the performance of a device under test, comprising: a chamber defining an internal cavity therein, adapted to enclose the device under test, and including walls having inwardly facing surfaces of an electromagnetically reflective material, thereby simulating a multi-path environment; at least one first chamber antenna arranged in the cavity and configured to transmit and receive electromagnetic waves having a frequency within a first predefined frequency range, at least one second chamber antenna arranged in the cavity, a measuring instrument connected to the device under test and the first chamber antenna and the second chamber antenna, for measuring the transmission between said device under test and the chamber antennas (5, 6); characterized in that the at least one second chamber antenna is configured to transmit and receive electromagnetic waves having a frequency within a second predefined frequency range, wherein said first predefined frequency range is at a higher frequency band than said second predefined frequency range, and wherein said first and second predefined frequency ranges are distinct and non-overlapping in relation to each other; in that said at least one first chamber antenna and said at least one second chamber antenna are arranged to operate simultaneously; and in that said measurement arrangement further comprises at least one frequency selective absorber arranged in the cavity, said frequency selective absorber being arranged to absorb electromagnetic waves having a frequency within said first predefined frequency range and reflect electromagnetic waves having a frequency within said second predefined frequency range. a chamber defining an internal cavity therein, adapted to enclose the device under test, and including walls having inwardly facing surfaces of an electromagnetically reflective material, thereby simulating a multi-path environment; at least one first chamber antenna arranged in the cavity and configured to transmit and receive electromagnetic waves having a frequency within a first predefined frequency range, at least one second chamber antenna arranged in the cavity, a measuring instrument connected to the device under test and the first chamber antenna and the second chamber antenna, for measuring the transmission between said device under test and the chamber antennas (5, 6); characterized in that the at least one second chamber antenna is configured to transmit and receive electromagnetic waves having a frequency within a second predefined frequency range, wherein said first predefined frequency range is at a higher frequency band than said second predefined frequency range, and wherein said first and second predefined frequency ranges are distinct and non-overlapping in relation to each other; in that said at least one first chamber antenna and said at least one second chamber antenna are arranged to operate simultaneously; and in that said measurement arrangement further comprises at least one frequency selective absorber arranged in the cavity, said frequency selective absorber being arranged to absorb electromagnetic waves having a frequency within said first predefined frequency range and reflect electromagnetic waves having a frequency within said second predefined frequency range.