Design and implementation of Ku-band frequency synthesizer

The design scheme and implementation of a PLL stepped-frequency source is herein introduced. The PLL's phase noise is first discussed. Combined with basic principles and operating characteristic of HMC703, a design is next given in Ku-band, which utilizes the external VCO chip to form the PLL. Parameters of the loop filter and the phase noise simulations are provided by HITTITE PLL Design. Through debugging the hardware circuits and writing the signal controlling program, the testing results of the real circuits controlled by FPGA finally shows the good performance in phase noise and spurious suppression.