New dielectric material system of Nd(Mg1/2Ti1/2)O3–CaTiO3 with V2O5 addition for microwave applications

Dielectric Properties and Applications of Low‐Loss (1−x)(Mg0.95Ni0.05)2TiO4‐xSrTiO3 Ceramic System at Microwave Frequency

“…Research for new materials with such an optimum combination has been ongoing and reported in these few years. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Microwave dielectric properties of binary titanate ceramic Mg 2 TiO 4 has a spinel-type structure, belonging to the cubic space group Fd-3m (2 2 7). It exhibits a high dielectric constant e r $ 14, a high-quality factor Q9f $ 150,000 (GHz), and a temperature coefficient of resonant frequency s f $ À50 ppm/°C.…”

Dielectric properties and crystal structure of Mg2TiO4 ceramics substituting Mg2+ with Zn2+ and Co2+

“…The unique electrical properties of ceramic dielectric resonators have revolutionized the microwave-based wireless communications industry by reducing the size and cost of filter and oscillator components in circuit systems [3][4][5][6]. At the same time, in order to work with high efficiency and stability, many researches have been focusing on developing new dielectric materials with a high quality factor (Q × f) and a near-zero temperature coefficient of resonant frequency ( f ) for use as dielectric resonator and microwave device substrate [7][8][9].…”

Microwave Dielectric Properties of (1 − x)(Mg0.95Ni0.05)TiO3–x(Ca0.8Sr0.2)TiO3 Ceramic System With Near‐Zero Temperature Coefficient

“…In particular, size reduction is mainly a result from the use of high dielectric constant material as the wavelength (λ) in dielectrics is inversely proportional to according to the relation where λ o is the wavelength in vacuum. However, as the frequency of interest is extended from ISM (industrial, scientific, and medical) bands to millimeter wave range, materials with high dielectric constant tend to become a less of interest . Consequently, high quality factor together with low dielectric constant would play a more prominent role instead, as high quality factor can significantly reduce the dielectric loss, and low dielectric constant allows a fast time for electronic signal transition at ultra high frequencies.…”

“…Zero τ f value (temperature coefficient of resonant frequency) is also one of the major requirements for dielectric materials to allow a frequency‐stable passive component. The most convenient and promising way to achieve a zero τ f value is to combine two compounds having negative and positive τ f values to form a solid solution or mixed phases . However, high dielectric constant materials, in general, exhibit high dielectric loss (low Q × f value) and large positive τ f value, whereas low loss ceramics are usually accompanied by low ε r value and negative τ f value .…”