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30 GHz Electronically Steerable Antennas Using BaxSr1−xTiO3-Based Room-Temperature Phase Shifters

Published online by Cambridge University Press:  10 February 2011

C. M. Carlson ,
T. V. Rivkin ,
P. A. Parilla ,
J. D. Perkins ,
D. S. Ginley ,
A. B. Kozyrev ,
V. N. Oshadchy ,
A. S. Pavlov ,
A. Golovkov  and
M. Sugak
...Show all authors
C. M. Carlson
Affiliation:
Department of Physics, University of Colorado, Boulder, CO 80309
T. V. Rivkin
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401
P. A. Parilla
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401
J. D. Perkins
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401
D. S. Ginley
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401
A. B. Kozyrev
Affiliation:
St. Petersburg Electrotechnical University, St. Petersburg, Russia 197376
V. N. Oshadchy
Affiliation:
St. Petersburg Electrotechnical University, St. Petersburg, Russia 197376
A. S. Pavlov
Affiliation:
St. Petersburg Electrotechnical University, St. Petersburg, Russia 197376
A. Golovkov
Affiliation:
St. Petersburg Electrotechnical University, St. Petersburg, Russia 197376
M. Sugak
Affiliation:
St. Petersburg Electrotechnical University, St. Petersburg, Russia 197376
D. Kalinikos
Affiliation:
St. Petersburg Electrotechnical University, St. Petersburg, Russia 197376
L. C. Sengupta
Affiliation:
Paratek Microwave, Inc., Columbia, MD 21045
L. Chiu
Affiliation:
Paratek Microwave, Inc., Columbia, MD 21045
X. Zhang
Affiliation:
Paratek Microwave, Inc., Columbia, MD 21045
Y. Zhu
Affiliation:
Paratek Microwave, Inc., Columbia, MD 21045
S. Sengupta
Affiliation:
Paratek Microwave, Inc., Columbia, MD 21045
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Abstract

We report the performance of 16-element phased array antennas operating at 30 GHz and ambient temperature. These antennas use BaxSr1−xTiO3(BST)-based phase shifters to produce the beam steering. Ferroelectric phase shifters offer advantages over current semiconductor and ferrite devices including faster switching speeds and lower costs. Also, ferroelectric phase shifters offer higher power handling capability than semiconductor devices and also have high radiation resistance. We made phase shifters from laser-ablated epitaxial BST films as well as from polycrystalline BST-oxide composite films. Although neither the devices nor the materials themselves are fully optimized, phase shifters have shown > 360° of phase shift with < 350 V DC bias (E < 9 V/µm) and ∼8 dB insertion loss. With ferroelectric phase shifters incorporated, antennas show radiation patterns with central-lobe half-power widths of ∼13° and side lobe intensities down by more than 10 dB. Using the phase shifters, the central lobe can be shifted, or “steered,” by ±18° in either direction. These results demonstrate a first step toward a prototype steerable antenna for 20–30 GHz satellite communications as well as other applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 603: Symposium KK – Materials Issues for Tunable RF & Microwave Devices , 1999 , 15
Copyright
Copyright © Materials Research Society 2000

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References

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