scholarly journals High dielectric constant and low loss microwave dielectric ceramics of (1 − y)(Mg0.95Co0.05)2(Ti0.95Sn0.05)O4–y(Ca0.61Nd0.8/3)TiO3 for microwave applications

2016 ◽  
Vol 124 (4) ◽  
pp. 460-463 ◽  
Author(s):  
Bing-Jing LI ◽  
Sih-Yin WANG ◽  
Yi-hong LIAO ◽  
Shih-Hung LIN ◽  
Yuan-Bin CHEN
Keyword(s):  
Dielectric Constant ◽  
High Dielectric Constant ◽  
Microwave Dielectric Ceramics ◽  
Low Loss ◽  
Microwave Dielectric ◽  
Microwave Applications ◽  
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).

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

Polytypic intergrowths in barium polytitanate dielectric ceramics

1986 ◽  
Vol 44 ◽  
pp. 456-459
Author(s):  
P. K. Davies
Keyword(s):  
Dielectric Constant ◽  
High Dielectric Constant ◽  
Ceramic Materials ◽  
Microwave Filters ◽  
Potential Candidate ◽  
Low Loss ◽  
The Past ◽  
Communications Industry ◽  
Dielectric Ceramics ◽  
High Dielectric

Over the past ten years several new ceramic materials have been developed for incorporation in high quality microwave integrated filters. A suitable ceramic dielectric microwave resonator material must have low loss in the microwave region, a low temperature coefficient of dielectric constant, and a high dielectric constant, typically 35-40. Most of the research conducted on the ceramic systems has focused upon phases in the BaO-TiO2 system. Many of the barium polytitanates have dielectric properties suited toward their use in microwave filters. Ba2Ti9O2O and BaTi4O9 are used commercially in the communications industry, and BaTi5O11 may also be a potential candidate for use in these systems.

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