| 摘要 |
PURPOSE:To obtain the best tracking signal without adjustment in respect to each tracking signal in a used receiving band, by compensating the quantity of phase shift, which is caused by the arrangement of mode couplers connected in a column, in all of the region of the used receiving band. CONSTITUTION:When a tracking signal E1 of the TE01 mode and a tracking signal E2 of the TM01 mode come to an aperture face I of an antenna 7, a phase difference between the sum of a phase shift corresponding to a conduit length for the TM01 mode in a TE01 mode coupler 11 and a phase shift corresponding to a conduit length for the TM01 mode in a TM01 mode coupler 12 and a phase shift corresponding to a conduit length for the TE01 mode in the TE01 mode coupler 11 is obtained between terminals P1 and P2 in a synthesizing circuit 5. A wide band phase shifter 13 which compensates the characteristic of the phase shift difference generated between terminals P1 and P2 throughout a used receiving band is inserted to the synthesizing circuit 5 to synthesize output signals of mode couplers 11 and 12 in a hybrid 4 without loss, thus outputting a tracking signal. |
