This paper introduces the requirements of naval radar systems from past to present. It describes phased array technologies (digital and analog) that are presently available in the market. Power sources architectures, A/D evolutions, transceiver architecture and system on chip configurations are described as the main technologies at phased array system. The correlation between the various technologies and phased array architectures trends is also discussed.
In this work we will introduce a general analysis of time jitter in Sigma-Delta synthesizer. One of the practical applications of I-bit Sigma-Delta systems is a generation of high-resolution local oscillator (LO). LO signals in transmit / receive circuits are typically generated using synthesizers, direct-digital synthesis (DDS), etc. In order to generate LO signals, one may use a single-bit SigmaDelta technique to encode sine waves. Due to hardware constraints, Sigma-Delta output is generally injected into a frequency multiplier system in order to generate a high frequency LO signals. Today, direct generation o f high frequency sinewave using a clock with higher frequency i s possible. In this letter we will analyze these different techniques and develop some robust tools that will help us to create a practical way of computation to decide how to choose the best configuration under minimum degradation of Signal to Noise Ratio (SNR) at the output of the LO generator system.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.