Broadband Active Electrically Small Superconductor Antennasстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 23 ноября 2017 г.
Аннотация:Topical Review. New type of broadband active Electrically Small Antennas (ESA) based on Superconducting Quantum Arrays has been proposed and developed. These antennas are capable of providing both sensing and amplification of broadband electromagnetic signals with a very high Spurious-Free Dynamic Range (SFDR) up to 100 dB (and even more) with high sensitivity. The frequency band can range up to tens of gigahertz depending on Josephson junctions characteristic frequency set by fabrication. In this paper we review theoretical and experimental studies of the Superconducting Quantum Arrays (SQA) and the SQA based antenna prototypes of both transformer and transformer-less types. The evaluated ESA prototypes were fabricated using a standard Nb process with critical current density 4.5 kA/cm2. The measured device characteristics, design issues, comparative analysis of different ESA types, as well as requirements to the applicable interface are reviewed and discussed.