Microwave Dielectric Properties of Ni0.2CuxZn0.8{xFe2O4 for Application in Antenna

Abstract

Structural, vibrational and microwave dielectric properties of Nickel-Copper-Zinc ferrite (Ni0:2CuxZn0:8ixFe2O4) ceramics have been presented in this paper. Samples have been prepared using conventional auto-combustion method. The X-ray difiraction (XRD) results conflrmed the ferrite samples to be of cubic spinel structure, which further was validated by Fourier transform infrared (FT-IR) and Raman spectroscopy. The relative permittivity (r) increased from 7.474 to 8.132 with successive increase in Cu content. The observed and calculated permittivity using Clausius- Mossoitti relation have been in good agreement. The temperature coe-cient of resonant frequency (?f) decreased from i75:85ppm/ - C to i32:12ppm/ - C with increase in successive Cu content. The relative permeability (r) have been calculated by using the Nicholson-Ross-Weir conversion technique. Using Ni0:2Cu0:2Zn0:6Fe2O4 sample the ferrite resonator antennas have been designed in three difierent shapes. The experimental and theoretical characteristics of the antennas have been compared and a good agreement has been achieved.