Journal ArticleDOI
Integral FMCW radar incorporating an HTSC delay line with user-transparent cryogenic cooling and packaging
D.J. Kapolnek,D.L. Aidnik,G.L. Hey-Shipton,T.W. James,N.O. Fenzi,D.L. Skoglund,B.J.L. Nilsson +6 more
TLDR
In this paper, a self-contained frequency-modulation continuous-wave (FMCW) radar incorporating a compact 2.2-ns broadband superconducting delay line operating at 80 K has been developed.Abstract:
A self-contained frequency-modulation continuous-wave (FMCW) radar incorporating a compact 2.2-ns broadband superconducting delay line operating at 80 K has been developed. The authors note that this is the first demonstration of an integral microwave system utilizing high-temperature superconductor (HTSC) circuitry incorporating a closed-cycle cooler and a long-life permanently sealed dewar. They discuss development efforts focused on high-frequency packaging techniques compatible with the stringent thermal and electrical performance requirements of HTSC microwave circuitry. They also review the prospects for development of low-cost and reliable closed-cycle cryogenic coolers in the 2-10-W size range. >read more
Citations
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Book
Electrically small, superdirective, and superconducting antennas
TL;DR: In this paper, the authors introduce the concept of superconductivity for antenna engineers and present a history and motivation for the concept, as well as a detailed overview of the current state of the art.
DissertationDOI
Superconducting Nonlinear Kinetic Inductance Devices
TL;DR: In this article, the authors describe a novel class of devices based on the nonlinearity of the kinetic inductance of a superconducting thin film, and demonstrate a current sensitivity of 8 pA/√Hz, making this device useful for transition edge sensor (TES) readout and other cutting-edge applications.
Journal ArticleDOI
Superconducting Delay Lines
TL;DR: In this article, the advantages and disadvantages of using different planar technologies for the construction of superconducting delay lines are discussed in greater detail, with theoretical analysis in frequency and time domains.
Journal ArticleDOI
Investigation of coaxial cable properties for HTS filters
H. Takeuchi,Y. Kubota +1 more
TL;DR: In this paper, a thin outer conductor coaxial cable was proposed to decrease thermal leakage in coaxial cables for HTS filters, which has an optimum thickness of 0.005 mm by simulation and experimentation of thermal and electrical performance.
Book ChapterDOI
TL-Based HTS Devices and Applications
A. P. Jenkins,D. Dew-Hughes +1 more
TL;DR: In this paper, a general review of HTS microwave devices is presented in conjunction with the Tl-based work of the group at Oxford, with an emphasis on Tlbased HTS materials.