| 摘要 |
PURPOSE: A transmission device of a wibro terminal is provided to reduce radiation of a spurious signal by removing a noise in a transmission signal when a wibro terminal transmits data through a transmission channel. CONSTITUTION: A power amplification module(110) amplifies power of an inputted signal. A main amplifier(120) amplifies an input signal of a power amplifier module. A noise extracting unit(130) adds a first signal of the power amplification module and a second signal which converts a phase of the signal of a main amplification unit. A coupler(150) removes a noise through a coupling between an input signal to the main amplifier and phase-inverted noise of the noise extracting unit.
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