Design of Ka-band Frequency Source Based on PLL

Abstract

 In communication，radar and electronic measuring instruments and other fields, the high demanding of frequency source need wider band, lower phase noise and spurs, and small frequency step. In order to meet the demand of system calibration，a low phase noise and spurs, small frequency step frequency source is developed. The advantages and disadvantages of various frequency source signals are analyzed, using the phase discriminator(PD:HMC704) and the voltage controlled oscillator(VCO:HMC531) of ADI Company and optimal design, a ka-band Frequency Source is designed successfully, a sign is output based PLL, frequency multiplication and filter, the phase noise are simulated，and the factors affecting the spurious dispersion and the solutions are discussed. The test results show that the output frequency range of the frequency source is 26～28.4GHz, the phase noise is -86.05dBc / Hz@10kHz，step-by-step is 1MHz，which achieves a higher level than similar products.