A novel approach to ferroelectric phase-shifter design using BaxSr1-xTiO3 (BSTO) films in a multilayer dielectric coplanar waveguide structure is described. By including a low-loss dielectric layer (SiO2) between the coplanar waveguide conductors and a layer of ferroelectric materials, significant reduction in insertion loss can be achieved in conjunction with a threefold increase in figure of merit (°/dB).
References
-
-
1)
-
C.M. Krowne ,
M. Daniel ,
S. Kirchoefer ,
J. Pond
.
Anisotropic permittivity and attenuation extraction from propagation constant measurements using an anisotropic full-wave Green's function solver for coplanar ferroelectric thinfilm devices.
IEEE Trans. Microw. Theory Tech.
,
2 ,
537 -
548
-
2)
-
E. Carlsson ,
S. Gevorgian
.
Effect of enhanced current crowding in a CPW with a thin ferroelectric film.
Electron. Lett.
,
2 ,
145 -
146
-
3)
-
M. Iskander ,
Z. Zhang ,
Z. Yun ,
R. Isom ,
M. Hawkins ,
R. Emrick ,
B. Bosco ,
J. Synowczynski ,
B. Gersten
.
New phase shifters and phased antenna array designs based on ferroelectric materials and CTS technologies.
IEEE Trans. Microw. Theory Tech.
,
2547 -
2553
-
4)
-
A. Djordjevic ,
M. Bazdar ,
T. Sarkar ,
R. Harrington
.
(1999)
LINPAR for Windows.
-
5)
-
B. Kolundzija ,
J. Ognjanovic ,
T. Sarkar
.
(1999)
WIPL-D: electromagnetic modeling of composite metallic and dielectric structures.
-
6)
-
T. Kaydanova
.
Improved performance in BST-based tunable circuits employing low-loss nontunable dielectric.
Integr. Ferroelectrics
,
1075 -
1085
http://iet.metastore.ingenta.com/content/journals/10.1049/el_20046119
Related content
content/journals/10.1049/el_20046119
pub_keyword,iet_inspecKeyword,pub_concept
6
6