S. Narasimhan | Searcharxiv

arXiv2019

Receive signal path design for Active phased array radars

Modern Active Phased array Radar systems with a large number of T/R modules, multi-channel receiver down converters and distributed power distribution networks leads to design and analysis of the receive signal path more complex. In this paper receive signal path design of a typical 1000 T/R modules based fully distributed active phased array radar is discussed in detail including the gain, Spurious Free Dynamic Range (SFDR) requirements at different levels. The techniques for optimization of SFDR and system performance also described along with the Systemvue model to receive path calculations is presented.

eess.SP↗

arXiv1995

Wigner Crystals Phases in Bilayer Quantum Hall Systems

(This is a substantially shortened version of the original abstract:) The Wigner crystal phase diagram of the bilayer systems have been studied using variational methods. Five crystal phases are obtained. As the layer spacing increases, the system will undergo a sequence of phase transitions. A common feature of most bilayer Wigner crystals is that they have mixed (pseudo-spin) ferromagnetic and antiferromagnetic order.

cond-mat↗