| 摘要 |
PURPOSE:To keep the orthogonality of the phase easily even with the frequency to be changed and to attain small size and no adjustment by providing a means compensating amplitudes aI, aQ of data of I and Q channels by [aI-(sinphi/cosphi)] and [aq(1/cosphi)] respectively when a phase difference between the 1st carrier and the 2nd carrier is (90+phi) degrees (phi is a positive or negative number). CONSTITUTION:When a phase difference between a 1st carrier a 2nd carrier is (90+phi) degrees, the amplitudes aI, aQ of data of I and Q channels are compensated respectively by [a//I-(sinphi/cosphi)] and [aq(1/cosphi)]. That is, when a phase difference between the 1st carrier and the 2nd carrier outputted from a 90 deg. hybrid 72 is (90+phi) degrees, the inputted I and Q channel data is compensated and the relation of phase of an orthogonal modulation wave is kept to an ideal position. Thus, even if the frequency is varied, the phase orthogonality is easily kept and small size and no adjustment are implemented. |
