Low noise block downconverter converting received signal to intermediate frequency signal

A low noise block downconverter converting a received right-hand (or horizontally) polarized wave signal and a received left-hand (or vertically) polarized wave signal to intermediate frequency signals, comprising:

• a first circuit outputting said received right-hand (or horizontally) polarized wave signal;
• a second circuit outputting said received left-hand (or vertically) polarized wave signal;
• a first local oscillator circuit outputting a first local oscillation signal;
• a second local oscillator circuit outputting a second local oscillation signal;
• a first mixer circuit mixing the right-hand (or horizontally) polarized wave signal output from said first circuit and the first local oscillation signal from said first local oscillator circuit to output the intermediate frequency signal;
• a second mixer circuit mixing the left-hand (or vertically) polarized wave signal output from said second circuit and the second local oscillation signal from said second local oscillator circuit to output the intermediate frequency signal;
• a first filter for removing interference waves from the output of said first mixer circuit;
• and
• a second filter for removing interference waves from the output of said second mixer circuit;
• one of said first and second filters including a plurality of stages of parallel resonant trap circuits.