Magnetically tunable microstrip linear resonator on polycrystalline ferrite substrate

A low cost conventional half-wave microstrip linear resonator has been designed at 2 GHz. central frequency and fabricated photolithographically by depositing metallic films oil prepared LiMnTi poly-crystalline ferrite substrate. Resonator characteristics have been examined by keeping it in the low biasing magnetic,field values (front 0 to 298 Guass) applied in transverse direction of wave propagation and normal to ground plane. Tunability of 339 MHz (17%) was achieved which is the best reported so far for such a structure for low magnetic field values with a minimum insertion loss of 10.68 dB. (C) 2007 Wiley Periodicals, Inc.