The signal generator with DDS-PLL Hybrid structure possesses the advantages of wide bandwidth and high frequency resolution. There are also some drawbacks, such as the serious spurious and harmonics, the increasing of difficulties in design and realization due to the zero phase error tracking of the linearity frequency modulation (LFM) signal, the long acquisition time, and the limitation to frequency modulation (FM) rate. A novel structure by adding sweeping voltage circuitry to the classical DDS-PLL hybrid in order to overcome the shortcomings is proposed. The predistortion was also involved in the study to compensate the static phase error which improves the pulse compression qualities. A test circuitry was designed. The measurements indicate that the acquisition time is reduced to 2.175μs and 1.032μs corresponding to loop bandwidths of 1MHz and 2MHz separately, the total phase error is depressed to be less than 4°, and the pulse compression result is nearly ideal where the main lobe width remains as ideal, PLSR is better than-38dB, the ISLR is better than-9.5dB.