Regensburg 2010 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
DF: Fachverband Dielektrische Festkörper
DF 2: Optical and nonlinear optical properties, photonic I
DF 2.4: Talk
Monday, March 22, 2010, 12:00–12:20, H11
Glass-ceramics as dielectrica for mobile applications in the GHz-range — •Stephan Knöner1,2, Martin Letz2, and Gerhard Jakob1 — 1Universität Mainz — 2Schott AG , Mainz
There is an increasing number of mobile applications, which are working in the range of several GHz, for example GPS-handsets. Important elements of these applications are antennas, which have small dimensions and are working also in the direct vicinity of interfering dielectrica or lossy material, as for example a human body, which is called *body-loading*. Such a *body-loading* leads to detuning of resonances. One approach for solving this problem is to use a dielectric material to confine the electric-field component of the near-field of the antenna in a material so that the antenna characteristics show fewer changes under body-loading. The material, normally ceramics, for so called *Dielectric-Loaded Antennas* need to have several properties, as e.g. a large dielectric constant and a small dielectric loss. Besides having advantages in manufacturing, glass-ceramics obtained from a glassy phase are intrinsic pore free materials, which can be produced with high geometry accuracy. We present results of such glass-ceramics by leaning on known configurations of low loss GHz-ceramics, which were obtained.