Dual‐frequency magneto‐dielectric resonator antenna based in a YIG matrix with control of HEM_11δ and TE_01δ modes

Abstract

This work presents a magneto-dielectric cylindrical resonator antenna (MDCRA) based on the YIG matrix, presenting two relevant new features. The first feature is to allow independent control of modes and the second one a dual-band response. The MDCRA has two distinct propagation modes HEM 11δ (5.78 GHz) and TE 01δ (6.75 GHz) which can be controlled independently. The magneto-dielectric resonator is manufactured using the magnetic ceramic material originated from the ferrites (Yttrium Iron Garnet, YIG) of composition Y 3 Fe 2 (FeO 4) 3 , which is placed on low cost FR4 dielectric substrate. The microstrip feeding mechanism design assures the decoupling of the two modes by using orthogonal microstrip lines. The proposed MDCRA antenna was designed, fabricated, and then characterized inside an anechoic chamber. The scattering S-parameters were analyzed in the frequency bands from 4.9 GHz to 7.6 GHz, with results within the expected range. The 2-D and 3-D radiation patterns are also presented. The validation was carried out with analytical mathematical equations, numerical formulation using the commercial CST Studio software, and experimental results, which shows a good agreement.