| 摘要 |
To couple three amplifiers in a television transmitter, a power divider (DIA) divides an input signal (A) into a two components, the second of which is split again into a further two components. All three resulting components are amplified, and then re-combined in phase and power in order to provide an increased power output signal. To couple three amplifiers in a television transmitter, a power divider (DIA) divides an input signal (A) into a first signal (A1) having a third of the input signal power, applied to an amplifier (C1), and a second signal (A2) having two-thirds of the input signal power. A further power divider (CEA) divides the second signal (A2) into third and fourth signals (A3, A4) each having half of the power of the second signal, applied to two amplifiers (C2, C3). A power combiner (CSA) adds the powers of the third and fourth amplified signals to form a fifth signal (A5). A further power combiner (COA) adds in phase the powers of the fifth signals (A5) and the first amplified signal. The power dividers and combiners are directive couplers with coupled lines. |
