A study on miniaturization of 900 MHz and 2GHz band antennas utilizing magnetic material

Experimental determination of magnetocrystalline anisotropy constants and saturation magnetostriction constants of NiZn and NiZnCo ferrites intended to be used for antennas miniaturization

“…The use of highpermittivity substrates also allowed size reduction, but causes a considerable decrease in antenna efficiency and bandwidth [2][3][4]. For applications in the low-UHF frequency band (300-862 MHz), the use of magneto-dielectric substrates is expected to overcome these limitations by offering larger bandwidths and improved efficiency [5][6][7][8][9]. Indeed it has been shown [10] that, although the permittivity (ε 0 ) increases the impact of losses, as well as the stored energy, the permeability (μ 0 ) plays the opposite role by decreasing them.…”

Structural and microwave characterization of Ni0.2CoxZn0.8−xFe2O4 for antenna applications

“…The use of magneto-dielectric material offers an additional degree of freedom in order to improve the performance of antenna. Hence some characteristics of antenna can be improved to satisfy the requirement of applications by suitably tuning the material parameters [2].…”

“…At this time, one of the solutions for the antenna-downsizing is using materials with permittivity and permeability greater than one. In recent years, many studies on miniaturization of the antenna using magneto-dielectric material have been reported [2][3][4][5]. The use of magneto-dielectric material offers an additional degree of freedom in order to improve the performance of antenna.…”

Comparative study of different feeding mechanisms on thermally stable resonator antenna

“…For miniaturization, picking magneto-dielectric material (materials having both permittivity and permeability greater than one) as ferrite might be a good solution because it has one more degree of freedom than simple dielectric materials, which could be used to improve the performance of antennas. Hence, the performance of antenna could be enhanced to fulfil the necessity of applications by appropriately tuning the material parameters [2].This paper presents a thermally stable composite material and their performances as an antenna with different feeding mechanisms. [4]) in appropriate manner such that the value of its temperature coefficient is near to zero, by using the following formula:…”