Low-Pass FSS for 50–230 GHz Quasi-Optical Demultiplexing for the MetOp Second-Generation Microwave Sounder Instrument

Autor: Oleksandr Sushko, Peter G. Huggard, M. Henry, Vincent Fusco, Steven Christie, Massimo Candotti, Kai Parow-Souchon, Ville Kangas, Robert Cahill, Raymond Dickie, Clive Parini, Rostyslav Dubrovka, Robert S. Donnan, Paul Baine

Publikováno v: Dickie, R, Christie, S, Cahill, R, Baine, P, Fusco, V, Parow-Souchon, K, Henry, M, Huggard, P G, Donnan, R S, Sushko, O, Candotti, M, Dubrovka, R, Parini, C G & Kangas, V 2017, ' Lowpass FSS for 50-230 GHz Quasi-Optical Demultiplexing for the MetOp Second Generation Microwave Sounder Instrument ', IEEE Transactions on Antennas and Propagation, vol. 65, no. 10, pp. 5312-5321 . https://doi.org/10.1109/TAP.2017.2740978

This paper reports the design, manufacture and characterisation of a new frequency selective surface (FSS) structure which meets the demanding requirements for transmission of 50.2 − 57.7 GHz radiation simultaneously for TE and TM polarizations at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ffcc6d9dd0db18e8b32dc46296436c5
https://doi.org/10.1109/tap.2017.2740978

Liquid crystal based Rotman lens antenna with switchable monopulse patterns

Autor: Robert Cahill, Y. Munro, Steven Christie, Atsutaka Manabe, Neil Mitchell

Publikováno v: BASE-Bielefeld Academic Search Engine

An electronically reconfigurable Rotman lens is described which generates multiple beams that can be switched from monopulse sum to difference radiation patterns when used in conjunction with a six element Vivaldi antenna array. This is achieved by e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d8e80b46568645fcb87bc4c80d1afb8
https://doi.org/10.1002/mop.27919

Downside Leverage and Event Risk in Fund of Funds Portfolios

Autor: Steven Christie

Publikováno v: The Journal of Alternative Investments. 10:68-75

Although leverage is important in any portfolio because of the upside and downside variability it adds, the focus often is on the magnified risk, i.e. the downside amplification, that it produces. During severe market disruptions, the leverage risk i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6fbbfbdd760518518d11efcb45ec3879
https://doi.org/10.3905/jai.2007.695269

Retrodirective Rotman lens constraining factors

Autor: Yunhua Zhang, Vincent Fusco, Robert Cahill, Jian Zhang, Steven Christie

Publikováno v: 2012 6th European Conference on Antennas and Propagation (EUCAP).

The mechanism by which a retrodirective Rotman lens operates is examined theoretically and prediction is compared with measurement. By deriving the reflection matrix based on the phase delay relationship between the beam ports and the array ports we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::06946695ae040bf7374bf1db5e3f48a7
https://doi.org/10.1109/eucap.2012.6205820

Electrical characterisation of liquid crystals at millimetre wavelengths using frequency selective surfaces

Autor: Vincent Fusco, Raymond Dickie, Steven Christie, George Goussetis, Neil Mitchell, Efstratios Doumanis, Giovanni Toso, Jose A. Encinar, R.A. Dudley, Paul Baine, Manuel Arrebola, David Linton, M. Naftaly, D. Hindley, Robert Cahill

Publikováno v: Electronics Letters. 48:611

The accurate measurement of the permittivity, loss tangent and dielectric anisotropy DC bias dependence for two different liquid crystal (LC) materials in the frequency range 140-165 GHz is described. The electrical characteristics are obtained by cu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6c69e5eccb6a27562723b3408a5d4d30
https://doi.org/10.1049/el.2012.1061