DVB‐H antenna structure using Z‐type hexagonal ferrite for folder‐type mobile phones

Abstract

The use of relatively small cavities of any shape is introduced for radiation efficiency measurements. Numerical simulations clearly show that the AUT location in the cavity does not change the estimation of radiation efficiency. To take into account cavity losses, a modified Huynh formulation is more adapted at high frequencies than the classical one. Both assumptions are strongly consistent with numerical and experimental results, which are based on antenna measurements in different shapes cavities. 2. P.-S. Kildal, K. Rosengren, J. Byun, and J. Lee, Definition of effective diversity gain and how to measure it in a reverberation chamber,

Internal digital video broadcasting‐handheld antenna with a low loss Z‐type hexaferrite for folder‐type mobile phones

“…However, the performance of an antenna using ferrite as the substrate is not satisfactory due to large magnetic and dielectric losses. Rhyu et al [13] proposed a compact DVB‐H antenna using a Z‐type hexagonal ferrite material. To achieve a good impedance matching of the antenna element and a dipole‐type wave mode, various design parameters are studied.…”