Simulation, Modeling and Implementation of an Ultra-Low Phase Noise X-band Frequency Synthesizer

Subject Areas : Majlesi Journal of Telecommunication Devices

Hossein Mohseni ¹ (Golpayegan University of Technology, Golpayegan, Iran.)

Received: 2020-10-07 Accepted : 2020-10-27 Published : 2020-12-01

Keywords: phase locked loop, phase noise, Multi-Loop Frequency Synthesizer,

Abstract :

One of the most important components in telecommunication systems and radar activities are frequency synthesizers. Among the important parameters of a frequency synthesizer are phase noise, frequency resolution, programming speed, scanning rate and spur level in the output spectrum of the system. Typically, it is not possible for a frequency synthesizer to reach all of these parameters simultaneously. In other words, there are trade-offs between desired parameters. Among the structures of frequency synthesizers that can be used to achieve the optimal point for these parameters are multi-loop phase lock loop. In this paper, by presenting the noise model of different elements of a frequency synthesizer, simulations related to the achievable phase noise for a sample synthesizer in the X band are presented and finally the results of implementation of a sample synthesizer are presented.

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