Design and analysis of nickel ferrite resonator antenna for C band applications

Abstract

This article shows the design of dielectric resonator antenna with nickel ferrite as dielectric material. Its main characteristics and measurements are described. Nickel ferrite was synthetized by sol–gel modified by ionic coordination reaction technique. Calcination was performed at 1100°C (10 h, 10°C/min step), followed by compression procedure at 227 MPa, to manufacture the bulk. Sintering process was applied at calcination temperature, for 4 h, to ensure bulk's physical resistance, and its electrical characterization was performed for antenna design and simulations. Simulated radiation patterns are presented, as reflection coefficient, which is compared with measurements. Measured reflection coefficient presented good agreement with performed simulations, with a difference of 0.74% in resonance frequency. Simulated radiation patterns also presented good results, with relatively high gain in co‐polarization planes, 2.11 dB for E plane, and low cross‐polarization E plane value, −47 dB.

NiFe2O4 nanoparticles for non-volatile bipolar resistive switching memory device

“…Especially, the spinel ferrites are a diverse class of materials with significant technological applications in both magnetic and electronic devices. Because of their diverse characteristics, spinel ferrites have been widely used in various applications like electromagnetic devices [12], resonators [13], high-density data storage [7], and spintronics devices [14]. Previously, spinal ferrites were employed to develop the RS devices [8,[15][16][17] and demonstrated the non-volatile memory applications [18,19].…”

Impact of Co2+ on the spectral, optoelectrical, and dielectric properties of Mg0.25Ni0.25Cu0.5−xCoxFe1.97La0.03O4 ferrites prepared via sol–gel auto-combustion route

“…They can easily be magnetized and demagnetized, also they have high resistivity at room temperature (RT). Soft ferrites are used in biomedical applications [2], cores of transformers [3], drug delivery [4], antennas [5], pharmaceutical [6], sensors [7], highfrequency power [8], and storage devices [9]. From various literature, there are several methods of preparation including the co-precipitation method [10-14], sol-gel auto combustion method [15][16][17], solid-state method [18], hydrothermal route of preparation [8], which have successfully been used to study the properties of ferrites.…”