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K Tadokoro,
H W Reesink,
S Panzer,
A Chabanel,
G Santailler,
T Guérin,
D Socquet,
B David,
J L Labrune,
C K Lin,
W C Tsoi,
M Letowska,
J Antoniewicz-Papis,
J Naniewicz,
K Dudziak,
E Lachert,
M Lozano,
K Schneider,
E L Snyder, M H Champion
Vox Sanguinis 09/2009; 98(1):78-84. · 2.86 Impact Factor
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ABSTRACT: A phased array antenna containing four linear microstrip patch
elements has been fabricated and tested. The elements were fed through
single-crystal yttrium-iron-garnet (YIG) phase shifters. By varying the
bias magnetic field, the input phases to the antenna elements can thus
been tuned, resulting in steering of the radiation beam in one
dimension. Measurements compared reasonably well with calculations
IEEE Transactions on Microwave Theory and Techniques 10/2000; · 1.85 Impact Factor
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ABSTRACT: X-band phased array antenna containing four linear microstrip patch elements has been fabricated and tested. The elements were fed through single-crystal yttrium–iron–garnet phase shifters. By varying the bias magnetic field the input phases to the antenna elements can thus be tuned, resulting in steering of the radiation beam in one dimension. © 2000 American Institute of Physics.
Journal of Applied Physics 04/2000; 87(9):6908-6910. · 2.17 Impact Factor
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ABSTRACT: We have fabricated a linear dipole array antenna containing four
elements fed by ferrite phase shifters. The steering properties of the
array have been thus measured. At f=10 GHz, the radiation beam was
steered 23° when the bias field was changed from 2775 to 2874 Oe
IEEE Transactions on Magnetics 10/1997; · 1.36 Impact Factor
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Magnetics Conference, 1997. Digests of INTERMAG '97., 1997 IEEE International; 05/1997
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ABSTRACT: The steering properties of a circular patch antenna array
fabricated on a yttrium-iron-garnet substrate containing 6×6
elements have been calculated. The formulation assumes the interaction
between patch elements can be neglected. Also, the Voigt permeability is
used as the effective permeability of the substrate. As such, the
steering rate of the radiation beam at 12 GHz is found to be
1.67°/Oe at the broad side direction. Hexagonal ferrites are
suggested to avoid permanent external magnetic bias
IEEE Transactions on Magnetics 02/1997; · 1.36 Impact Factor
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J.S. Herd,
L.D. Poles,
J.P. Kenney,
J.S. Derov, M.H. Champion,
J.H. Silva,
M. Davidovitz,
K.G. Herd,
W.J. Bocchi,
S.D. Mittleman,
D.T. Hayes
[show abstract]
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ABSTRACT: The use of high-temperature superconducting (HTS) feed lines and
phase shifters can substantially improve the performance of microwave
and millimeter-wave printed phased array antennas. A novel antenna
architecture is described that provides a broadband radiating aperture
to be used as a scanning array with compatible low-loss HTS phase
shifters. The approach follows an earlier design demonstrated at 12 GHz,
and this work extends the approach to 20 GHz. The antenna design,
radiation patterns, bandwidth measurements, and thermal analysis are
reported. A prototype thermal isolator design is described that reduces
the heat load of coaxial interconnections between cryocooled and room
temperature systems
IEEE Transactions on Microwave Theory and Techniques 08/1996; · 1.85 Impact Factor
