COUPLED NON-UNIFORM BI-SQUID: A NUMERICAL INVESTIGATION

被引：5

作者：

Longhini, P. ^{[1
]}

Berggren, S. ^{[2
]}

Palacios, A. ^{[2
]}

In, V. ^{[1
]}

de Escobar, A. Leese ^{[1
]}

机构：

[1] Space & Naval Warfare Syst Ctr, San Diego, CA 92152 USA

[2] San Diego State Univ, Dept Math & Stat, Nonlinear Dynam Grp, San Diego, CA 92182 USA

来源：

ADVANCES IN CRYOGENIC ENGINEERING, VOLS 57A AND 57B | 2012年 / 1434卷

关键词：

superconducting arrays; mathematical models; coupling; DC SQUIDS; AMPLIFIER; ANTENNA;

D O I：

10.1063/1.4707038

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This work investigates through numerical simulations a novel device that improves dynamic range and linearity. The standard DC SQUID can increase in linearity by adding a third junction, changing to a device known as the bi-SQUID. It is known that the dynamic range can increase by connecting SQUIDs in series, and it has been shown that non-uniformity in the loops sizes in arrays of SQUIDs can produce a unique 'anti'-peak at the zero magnetic flux (device know as a SQIF). Thus, combining these ideas we can improve the dynamic range and design a highly linear device with a unique 'anti'-peak. Hence, this device can be referred to as a bi-SQIF or non-uniform bi-SQUID array. Results have shown that the maximum voltage swing increase proportional to N, where N is the number of loops connected in series. The spur free dynamic range also improves as N increases, which is directly related to the linearity of the device. Therefore, we have designed a device which can lead to improvements which can be applicable to low noise amplifier (LNA), and provide a platform for creating "electrically" small antennas.

引用

页码：1167 / 1174

页数：8