PHASE ADJUSTMENT TYPE POWER DISTRIBUTING DEVICE, AND AUTOMATIC MATCHING DEVICE USING THE SAME

PROBLEM TO BE SOLVED: To automatically match a transmitter and an antenna in order to quickly radiate a radio wave, for example, at a time of extraordinary disaster or at a time of existing device repair work in matching a medium wave transmission system. SOLUTION: An automatic matching device is provided with a phase adjustment type power distributing circuit 102 which changes a phase of a radio wave which passes through the inside of a medium wave rat race circuit, and increases or decreases a distribution ratio of outputs which appear in a plurality of terminals; a matching circuit 101 which adjusts antenna impedance to transmitter output impedance; and a CPU 103. The CPU 103 controls the whole circuits and automatically matches the transmitter and the antenna. The phase adjustment type power distributing circuit 102 outputs electric power from the transmitter to the matching circuit 101, a dummy device 105, and a dummy device 106, changing the distribution ratio by adjusting a phase of a transmission route of the medium wave rat race circuit, and adjusts an amount of reflection power from the antenna. Although matching of the medium wave requires complex calculations and works for changing element constants, the invention permits anyone to quickly compose the medium wave transmission system. COPYRIGHT: (C)2009,JPO&INPIT