| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce electromagnetic radiation from a transmission line and a coupler by modulating a first and a second carrier signals outputted by responding to control signals obtained from outside in accordance with a differential shift between the both carrier signals by receiving outside data. SOLUTION: A carrier generator 72 has an attaching shift angle adjustable between one another and variable. A first and a second carrier signalsωc1 ,ωc2 , are outputted by responding to differential control signals output from a controller 74, and the both carrier signalsωc1 ,ωc2 are respectively inputted into balance modulators 761 , 762 . The balance modulators 761 , 762 receiving outside input data such as image data, in accordance with a differential shift between the first and the second carrier signalsωc1 ,ωc2 output a first a second modulation output signals M1 , M2 having a variable phase angle differential between one another to a transmission line 40 differentially driven through a dividing circuit 78. The phase angle difference is selected to avoid leakage signals due to misalignment causing between a coupler 100 and the transmission line 40 during relative motion therebetween.</p> |
