Design Of A New Type Of Ultrashort Wave Broadband Calibration Clock Source

With the rapidly evolving communication technology, communication devices are upgrading.in every minute. Among such trend, the miniaturization of the multichannel measuring directional device stands out. Thus, as the core component of the multichannel measuring directional device, the requirement of improving Correction signal source is clear and present. Now developing multi-functional Correction signal source is a promising and attractive research field.This thesis designs a multi-functional correction clock module with a frequency source core. This device provides three output signals. The first is a 600-1600 MHz bandwidth comb spectrum output with 16 MHz higher frequency,500 kHz frequency gap. And-30 dBm—90 dBm output power. The second signal is a 600-1600 MHz pulse output with 100 μs pulse cycle and 3μspulse width. The last output is a 80 MHz fixed point frequency signal with-120 dBc/Hz@10 kHz phase noise.In this study, by comparing step diode scheme and counter scheme, to fine tune the spectrum width, this design select the latter to produce comb spectrum. Typical phase lock loop is proposed in pulse generator designation to provide precise switch time control by complex programmable logic device(CPLD). Among the 80 MHz high phase noise frequency source with phase lock loop and frequency multiplier, the final decision is prone to the transistor with frequency doubling implementation. Engineering practical sample has been provided in the final design.This dissertation proposed an innovational clock correction design, to be specific, an unique comb spectrum correction method. Another improvement this study provided is the implementation of output bandwidth control which expanded the application scenario of this device. Other optimizations include the switching between single output module to multi-functional device which requires less space. A digital programmable device is also involved to provide upgradable interface for the possible adjustment demand in future.Comprehensive tests have been conducted for the final engineering sample and detailed analysis is also provided. For the drawbacks of the sample, summarize and possible solution have been discussed.