Patent ID: 8030931

Claim:
An upconversion stage configured for a local radiofrequency coil array of a wireless magnetic resonance imaging system, said upconversion stage comprising: a plurality of upconversion circuits, each upconversion circuit comprising: a parametric amplifier having an input that receives a magnetic resonance signal in the radio frequency range from a local coil, an antenna operating in the microwave range, and a delay line connected between the amplifier and the antenna, each of said upconversion circuits upconverting the magnetic resonance signal in said radiofrequency range to a signal in said microwave range that is radiated by said antenna; and each delay line in each upconversion circuit having a path length, and the path length of the delay line in one of said upconversion circuits being different, by a predetermined amount, from the path length of the delay line in another of said upconversion circuits that is adjacent to said one of said upconversion circuits.