Zobrazeno 1 - 10
of 116
pro vyhledávání: '"W.G. Lyons"'
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:
Peter G. Murphy, D. R. Arsenault, D.C. Shaver, Alfredo C. Anderson, Robert Berger, W.G. Lyons, C.L. Keast, T. C. L. G. Sollner, R.W. Ralston
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 7:2462-2467
A novel compressive cryoreceiver architecture has been proposed combining analog HTS, cryoelectronic, and advanced high-speed GaAs and high-speed/low-power SOI CMOS semiconductor technologies. The proposed receiver will rival the sensitivity of narro
Autor:
T. C. L. G. Sollner, R.W. Ralston, Peter G. Murphy, D. R. Arsenault, M. M. Seaver, R. R. Boisvert, R.L. Slattery, Alfredo C. Anderson, W.G. Lyons
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 44:1258-1278
Wideband compressive receivers are an attractive application niche for analog high temperature superconductive (HTS) microwave filters. Chirp filters form the basis of compressive receivers, implementing a chirp-transform algorithm in the analog doma
Autor:
D. R. Arsenault, Alfredo C. Anderson, T. C. L. G. Sollner, W.G. Lyons, M. M. Seaver, R. R. Boisvert, R.L. Slattery
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 5:2071-2074
Exploiting the high-temperature superconductor YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO), we have extended chirp-transform processing to instantaneously analyze the spectrum of an incoming signal over greater bandwidth than any competing technology. A com
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 4:41-44
A closed-form expression is presented for the current distribution in an isolated strip made from a superconducting thin film with thickness less than a few penetration depths. This equation gives a good approximation within certain limits for the re
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 4:136-142
The traditional two-fluid model of superconducting conductivity was modified to reflect the BCS coherence effects in the conductivity of a superconductor, which are incorporated through an effective ratio of normal-to-superconducting electrons. The r
Autor:
W.G. Lyons, A. Sudbury, Anand Gopinath, W. Gelnovatch, D. M. Sudbury, P.W. Staecker, D. McQuiddy, M.A. Gouker, E. Cohen, W. P. Delaney
Publikováno v:
2011 IEEE MTT-S International Microwave Symposium.
The IEEE MTT Society lost an esteemed colleague and friend, Roger W. Sudbury, on 22 August 2010. We celebrate Roger's life, wisdom, fellowship, and energy through a series of talks in this session that cover Roger's human relationships and contributi
Publikováno v:
Microwave and Optical Technology Letters. 6:728-732
A 3-GHz-bandwidth real-time spectral-analysis receiver has been demonstrated. The fully integrated compressive receiver is based on the chirp-transform algorithm and uses a high-Tc superconductive (HTS) tapped-delay-line chirp filter with a time-band
Publikováno v:
IEEE Transactions on Applied Superconductivity. 3:2840-2843
The design, fabrication, and measurement of a scanned beam microstrip antenna array with a high-temperature superconducting YBCO feed network are described. A novel geometry is introduced which integrates the antenna array into a window on the vacuum
Publikováno v:
IEEE Transactions on Applied Superconductivity. 3:2891-2894
The implementation of a wideband real-time spectrum-analysis receiver based on YBa/sub 2/Cu/sub 3/O/sub 7-x/ chirp filters and a chirp-transform algorithm is presented. The integration of the high-T/sub c/ spectrum-analysis subsystem with high-speed