Microstrip Rectangular Patch Antenna Printed on LiTi Ferrite with Perpendicular DC Magnetic Biasing

Characterization of a tunable & switchable microstrip rectangular patch antenna printed on synthesized LiTi ferrite substrate with a normal magnetic bias field is presented. In this paper the concept of switching and tuning has been described by magnetostatic and spin waves phenomenon. The DC magnetic biasing generate these both type of waves which response a number of novel magnetic and electrical characteristics including switchable and polarized radiations from a microstrip antenna. In such a case of substituted polycrystalline ferrite antenna due to the DC biasing, most of the power will be converted into mechanical waves and little radiates into air. Under such condition the antenna become switch off, in the sense of effectively absence as radiator. The preparation of ferrite by the solid state reaction technique is also précised with the short description of electric and magnetic properties. [Journal of American Science 2010;6(3):46-51]. (ISSN: 1545-1003).