Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Anthony R. Kerr"'
Autor:
Tannaz Farrahi, Robert M. Weikle, Michael E. Cyberey, Anthony R. Kerr, Jiwei Lu, Arthur W. Lichtenberger
Publikováno v:
IEEE Transactions on Applied Superconductivity. 29:1-6
The current state-of-the-art approach for superconductor–insulator–superconductor (SIS) junction fabric-ation is based on magnetron sputtering and the Gurvitch Al overlayer trilayer process, where an Al overlayer is deposited onto the Nb base ele
Autor:
Arthur W. Lichtenberger, Anthony R. Kerr, J.Z. Zhang, S. K. Pan, Michael E. Cyberey, David N. Oakland
Publikováno v:
IEEE Transactions on Applied Superconductivity. 25:1-5
High quality, low-leakage superconductor-insulator-superconductor (SIS) junctions with Nb electrodes and aluminum oxide barriers are widely reported in the literature, and have become integral in the design and fabrication of various superconducting
Autor:
P. Dindo, J. E. Effland, Anthony R. Kerr, S. K. Pan, Arthur W. Lichtenberger, Eugene F. Lauria, Stephane Claude
Publikováno v:
IEEE Transactions on Terahertz Science and Technology. 4:201-212
As the Atacama Large Millimeter/submillimeter Array (ALMA) nears completion, 73 dual-polarization receivers have been delivered for each of Bands 3 (84-116 GHz) and 6 (211-275 GHz). The receivers use sideband-separating superconducting Nb/Al-AlOx/Nb
Publikováno v:
IEEE Transactions on Terahertz Science and Technology. 4:39-48
This paper presents a study characterizing the connection repeatability and reflection coefficient of submillimeter waveguide flanges in the 500-750 GHz band (WR-1.5 or WM-380). The connection repeatability of four types of flange was measured using
Autor:
J Randa, Anthony R. Kerr
Publikováno v:
IEEE Microwave Magazine. 11:40-52
We have presented a close look at effects of order hf/kT in noise measurements and in the definition of noise quantities-noise temperature, noise figure, etc. Given the perennial push to higher frequency, lower noise, and smaller uncertainty, such ef
Autor:
Anthony R. Kerr, Ricardo Finger
Publikováno v:
International Journal of Infrared and Millimeter Waves. 29:924-932
Measurements of microwave attenuation at room temperature and 4.2 K have been performed on some conductors commonly used in receiver input circuits. The reduction in loss on cooling is substantial, particularly for copper and plated gold, both of whi
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:3525-3528
High-energy-gap superconductors with low resistive loss and high-current-density tunnel barriers are important to increasing the operating range of THz electronics. This paper describes the development of superconducting NbTiN thin films and AlN tunn
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:194-197
180-degree IF hybrids are potentially useful for balanced superconductor-insulator-superconductor (SIS) mixers. We have developed a compact Nb-based 180-degree hybrid for 4-12 GHz which addresses concerns of element size, ohmic loss, and IF bandwidth
Publikováno v:
2015 IEEE MTT-S International Microwave Symposium.
In 1979, John Tucker showed that if the nonlinearity of a mixer diode is so sharp that its conductance changes significantly over a voltage increment hf/e, then its mixer characteristics are no longer described by classical mixer theory (e.g., as nor
Autor:
J.Z. Zhang, S. K. Pan, G. Rodrigues, C.C. Chin, Arthur W. Lichtenberger, D. Derdall, D. Bond, F. Jiang, Marian Pospieszalski, E. Lauria, P. Dindo, Anthony R. Kerr, J. Sebesta, Tom Cecil
Publikováno v:
International Journal of Infrared and Millimeter Waves. 25:569-600
We have built a 100 GHz sideband-separating receiver. The receiver, a breadboard for the band 3 cartridges for ALMA, achieves a SSB noise temperature of 6hf/k with a 4–8 GHz IF. We show that it is possible to meet the ALMA specifications. The desig