| 摘要 |
The transmitter is constructed according to LINC principles, linear amplification with non-linear components. It has two parallel signal branches each with an amplifier (V1,V2) and a phase modulator (PM1,PM2). A band separation (WE) is provided which divides the input signal (D1) onto the two signal branches. A combiner (KB) adds the output signals (S11,S22) of both branches to a sum signal (SS). To adjust phase errors in the two signal branches, the band separation is arranged to interchange the allocation of the input signal parts (S1,S2) to the two signal branches cyclically with a preset frequency (fc). The cyclical commutation of the input signal sections produces an amplification modulation of the sum signal which is detected and changed depending on the phase in one of the signal branches so the amplitude modulation is minimal. |
