| 摘要 |
In this phase noise elimination circuit, an inputted high-frequency signal is branched into two high-frequency signals by a power distribution part 3, and one high-frequency signal out of the two branched high-frequency signals is passed through an acoustic wave delay part 5 so as to be delayed by a specified time as compared to the other high-frequency signal. Then, the one high-frequency signal delayed by a specified time as compared to the other high-frequency signal and the other high-frequency signal are adjusted by phase amplitude adjustment parts 6, 7 so as to become generally equal in amplitude and phase of their respective non-noise signal components to each other in a power combining part 6. As a result, in the power combining part 6, signal components of the two high-frequency signals intensify each other in power because of their equality in phase and amplitude, while noise components of the two high-frequency signals weaken each other in power because of their unequalness in phase. This phase noise elimination circuit is capable of eliminating phase noise with small-scale, low-cost, and easy-to-mass-produce electrical circuits. |
