Complex impedance spectroscopy of perovskite microwave dielectric ceramics with high dielectric constant

2018 ◽  
Author(s):  
Zixing Wang ◽  
Changlai Yuan ◽  
Baohua Zhu ◽  
Qin Feng ◽  
Fei Liu ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Impedance Spectroscopy ◽  
High Dielectric Constant ◽  
Complex Impedance ◽  
Complex Impedance Spectroscopy ◽  
Microwave Dielectric Ceramics ◽  
Microwave Dielectric ◽  
Dielectric Ceramics ◽  
High Dielectric

Research on Mechanical Design with Beidou GPS Navigation Antenna Design Terminal

2013 ◽  
Vol 345 ◽  
pp. 416-420
Author(s):  
Guo Zhi Chen ◽  
Guo Tong Chen ◽  
Jian Sun ◽  
Jing Miao
Keyword(s):  
Dielectric Constant ◽  
Microstrip Antenna ◽  
High Dielectric Constant ◽  
Mechanical Design ◽  
Relative Dielectric Constant ◽  
Satellite Navigation ◽  
Microwave Dielectric Ceramics ◽  
Microwave Dielectric ◽  
Dielectric Ceramics ◽  
High Dielectric

With advances in technology and machinery manufacturing technology, the satellite navigation system plays a more and more important role in the modern society. People demand increasingly for satellite navigation. Satellite navigation is increasingly used in military systems, so military and civilian value is higher and higher. For the satellite signal reception, microstrip antenna plays an indispensable role. As the mechanical design of microstrip antenna is simple, easy manufacture, low cost, smaller size, lighter weight, with the overall unity of active devices and integrated circuit, etc. The successful development of high dielectric constant ceramic material enables the area of microstrip antenna to narrow several times. Microwave dielectric ceramics material has some merits such as high dielectric constant, thermal stability and excellent characteristics of small dielectric loss. Different dielectric constant substrate can be prepared through changing and doping modification of process parameters, including the relative dielectric constant of microwave dielectric ceramics for more than a few dozens which can be used for different microwave frequencies. Those are important reasons for promoting the development of microstrip antenna.

Lattice Parameters of Bronze-Type 3BaO·2R2O3·9TiO2 (R=Sm and Nd) Solid Solutions for Microwave Dielectric Ceramics

1993 ◽  
Vol 37 ◽  
pp. 79-85 ◽  
Author(s):  
Hitoshi Ohsato ◽  
Toshiyuki Ohhashi ◽  
Kazuhiko Sumiya ◽  
Shinya Suzuki ◽  
Takashi Okuda
Keyword(s):  
Low Temperature ◽  
High Dielectric Constant ◽  
Dielectric Constants ◽  
Dielectric Resonators ◽  
Microwave Dielectric Ceramics ◽  
Low Dielectric ◽  
Satellite Broadcasting ◽  
Microwave Dielectric ◽  
Dielectric Ceramics ◽  
High Dielectric

Microwave dielectric ceramics with high quality have received attention due to the rapid progress in microwave telecommunication and satellite broadcasting. The desirable properties in microwave dielectric resonators are a high dielectric constant (εr), low dielectric loss (tanδ) (i.e. high Q (Q =1/tanδ)), and low temperature coefficient of the resonant frequency(τf). Properties of dielectric ceramics in the TiO2-rich region of the BaO-Nd2O3-TiO2 ternary system (Fig. 1) were reported to have excellent dielectric constants, low dielectric losses and low temperature coefficients of capacitance by Kolar et al. (1978).

Improvement of quality factor of SrTiO 3 dielectric ceramics with high dielectric constant using Sm 2 O 3

2019 ◽  
Vol 102 (7) ◽  
pp. 3849-3853 ◽  
Author(s):  
Ting Luo ◽  
Xinxuan Shan ◽  
Jingwei Zhao ◽  
Hengheng Feng ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Quality Factor ◽  
High Dielectric Constant ◽  
Dielectric Ceramics ◽  
High Dielectric

X7R type lead complex perovskite ferroelectric ceramics with high dielectric constant

1998 ◽  
Vol 13 (2) ◽  
pp. 253-256 ◽  
Author(s):  
Lijian Ruan ◽  
Longtu Li ◽  
Zhilun Gui
Keyword(s):  
Dielectric Constant ◽  
High Dielectric Constant ◽  
Temperature Stability ◽  
Ferroelectric Ceramics ◽  
Complex Perovskite ◽  
Two Phase ◽  
Dielectric Ceramics ◽  
High Dielectric ◽  
Lead Complex ◽  
Sintering Method

A new X7R type dielectric ceramics for the PMN-BT-PT system with a high dielectric constant (4832) and a low firing temperature (1100–1130 °C) was prepared by the mixed-sintering method. The results of XRD, SEM, EDAX, and dielectric measurements showed that the dielectric ceramics is a two-phase composite with the high dielectric constant originating from the ferroelectric relaxor, and the temperature stability of the dielectric properties from two-phase coexistence.

Temperature-stable dielectric ceramics in Ba4Nd2Ti4Ta6O30/(La0.1Bi0.9)2Ti2O7 biphase system

1999 ◽  
Vol 14 (8) ◽  
pp. 3375-3378 ◽  
Author(s):  
J. Wang ◽  
X. M. Chen ◽  
J. S. Yang
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Temperature Coefficient ◽  
High Dielectric Constant ◽  
Zero Temperature ◽  
Dielectric Ceramics ◽  
High Dielectric

Biphase dielectric ceramics in the system of (1 − x)Ba4Nd2Ti4Ta6O30/ x(La0.1Bi0.9) 2Ti2O7 were investigated to obtain a near-zero temperature coefficient of dielectric constant. With the increase in x, the dielectric constant increased slightly, and the temperature coefficient changed from negative to positive. High dielectric constant of ε = 143 and good temperature stabibility (τ ε = −48 ppm/ °C) were achieved in a composition of x = 0.45, and the increased dielectric loss became the new problem.

Sr(Ga 0.5 Nb 0.5 ) 1− x Ti x O 3 Low‐Loss Microwave Dielectric Ceramics with Medium Dielectric Constant

2015 ◽  
Vol 98 (8) ◽  
pp. 2534-2540 ◽  
Author(s):  
Pian Pian Ma ◽  
Xiao Qiang Liu ◽  
Fa Qiang Zhang ◽  
Juan Juan Xing ◽  
Xiang Ming Chen
Keyword(s):  
Dielectric Constant ◽  
Microwave Dielectric Ceramics ◽  
Low Loss ◽  
Microwave Dielectric ◽  
Dielectric Ceramics
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