A DCS/WCDMA DUAL FREQUENCY SYNTHESIZER AND A general dual frequency synthesizer

摘要

A DCS/WCDMA dual frequency synthesizer is provided in the present invention. On the one hand, the synthesizer selects the distributed parameter capacitor instead of the conventional applied capacitor, on the other hand, the direct current circuit and the radio frequency circuit in the synthesizer are separated physically, and each components including the capacitor are skillfully and physically included. Therefore, based on the same principle, the present invention further provides a dual frequency synthesizer applied in a larger range, and the synthesizer continues to use the application spirit about the distributed parameter capacitor of the said DCS/WCDMA dual frequency synthesizer. Because the entire structure of the synthesizer is disposed again, the present invention has the advantages of small volume, low loss, large power capacity and high isolation between the circuits, etc.