Open AccessPrinted inverted‐F antennas over lossy magneto‐dielectric materials: Theoretical approach and validations
Author(s) -
Niamien Manouan Aka Constant,
Collardey Sylvain,
Sharaiha Ala,
Mahdjoubi Kourosh
Publication year - 2014
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2013.0244
Subject(s) - lossy compression , dielectric , bandwidth (computing) , permittivity , materials science , radiation , magneto , optics , dielectric permittivity , radiation pattern , optoelectronics , acoustics , physics , computer science , antenna (radio) , electrical engineering , engineering , telecommunications , magnet , artificial intelligence
Closed‐form formulas for radiation efficiency and bandwidth predictions, suitable for printed inverted‐F antennas (PIFAs) over lossy magneto‐dielectric materials, are proposed. The formulation uses the field expressions inside the cavity for the first resonant‐mode (fundamental mode) based on the cavity model. It includes the substrate effective permittivity ( ε re ) and permeability ( µ re ) in addition to the radiation from both the shorting‐pad and the slot. The derived expressions for efficiency and bandwidth are validated with measurements and full‐wave CST simulations based on the finite integration technique. Various sizes and types of magneto‐dielectric materials are considered. It is noticed that magneto‐dielectric materials having √( ε re µ re ) > ε r or simply with µ r > ε r are advantageous for both radiation efficiency and bandwidth enhancement.