Study of a microwave ferrite resonator antenna, based on a ferrimagnetic composite (Gd ₃ Fe ₅ O ₁₂ )GdIG _X –(Y ₃ Fe ₅ O ₁₂ )YIG _{1− X}

Abstract

The authors report a study on microwave properties of a ferrimagnetic ceramic composite (Gd 3 Fe 5 O 12 )GdIG X -(Y 3 Fe 5 O 12 )YIG 12X . The magnetic and dielectric measurements at microwave frequency were made through the Hakki -Coleman's procedure and through the excitation of a cylindrical ferrite resonator antenna (FRA). The hysteresis loops of the GdIG X YIG 12X ferrimagnetic composite were obtained. The numerical simulation study was performed using Ansoft's High Frequency Structure Simulator (HFSS TM ) software. The agreement between the experimental data and the simulated results is very good. These results demonstrated that, by varying the material composition of the resonator, ferrimagnetic composite GdIG X YIG 12X could operate as a magneto-dielectric antenna with bandwidth in the range of 7.5 -11% and in the frequency range of 4.4 -5.3 GHz. Additionally, all FRAs presented a low negative value of t f , which indicates suitability for microwave applications such as mobile communication systems or satellite broadcast systems.

A Study of the Dielectric Properties of Al2O3–TiO2 Composite in the Microwave and RF Regions

“…Thus, air gaps used for the simulated results were the closest to the experimental results for the far field data for the DRA analyzed. 15 It is relevant to point out that the frequencies of all the DRA measured were in agreement with the empirical expression for HE 11d mode (Eq. 7).…”

An UHF RFID reader antenna made of recycled and reutilized materials from construction debris

“…9, compile those impedance informations in Figs. 7 and 8 together, showing that the simulation and experimental result are not identical, like presented in [16] and [17] , but very similar. This is probably due to the difficulty to model some parts of the prototype, such as screws and welds, leading to some inaccuracy among the simulated and experimental results.…”

Experimental and numerical investigation of the microwave dielectric properties of the MgTiO3 ceramic matrix added with CaCu3Ti4O12

“…It is important to note that both experimental and simulation results showed great variability in the results, according to the DRA distance to the probe. This particular challenge finds its origin in the presence of an air gap between the dielectric resonator and the metallic conductors, which have been thoroughly studied previously [26]. Furthermore, in order to illustrate the relevant effect, we defined in Fig.…”