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CuO-doped Nd(Mg0.4Zn0.1Sn0.5)O3 ceramics prepared by the conventional solid-state method were investigated for application in monopole antenna loaded with high permittivity superstrate. A dielectric constant of 19.5, a quality factor (Q×f) of 18,600 GHz, and a temperature coefficient of resonant frequency (τƒ) of −59.0 ppm/ °C was obtained when 0.1 wt% CuO-doped Nd(Mg0.4Zn0.1Sn0.5)O3 ceramics sintered...
The microwave dielectric properties of rutile (Zn1/3B2/3) x(TiySn1-y)1-xO2 (B=Nb5+,Ta5+, 0.05 les x les 0.35, y=0.2, 0.8) were investigated with structural characteristics. A single phase with tetragonal rutile (P42/mnm, No.136, Z=2) structure was obtained through the entire range of compositions. With an increase of (Zn1/3B2/3)O2 content, the dielectric constant (K) of sintered specimens with (Ti...
Microwave dielectric properties of ATiO3, ATa2O6 and AWO4 (A = Ni, Mg, Co) ceramics were investigated based on the structural characteristics of oxygen octahedra. ATiO3 (trigonal ilmenite), ATa2O6 (tetragonal tri-rutile) and AWO4 (monoclinic wolframite) ceramics have A- and B-site oxygen octahedra with the different sharing type. Quality factor (Qf) of the specimens was affected by the sharing types...
A cavity perturbation technique is presented for measurement of dielectric constant and dielectric loss of the dielectric materials at X-band microwave frequency. A tunable rectangular cavity to operate in TE103 mode was designed and fabricated. Tunable cavity is calibrated to read its resonance frequency directly from the micrometer screw arrangement attached with the cavity. Shift in resonance frequency...
Dielectric Resonator has wide application in satellite communication because of its small size, large bandwidth and high Q-factor at microwave and millimeter wave frequencies. Dielectric Resonator also finds its application as an antenna element due to high radiation efficiency, small size and low losses. The resonant frequency is determined by the overall physical dimension of the puck and the dielectric...
The behavior of {111}-textured Pb(Zr0.53Ti0.47)O3 (PZT) deposited by the sol-gel technique in thin film bulk acoustic resonators (TFBAR's) was investigated at a resonance frequency of about 1 GHz. The resonators were fabricated on Si wafers using deep silicon etching to create a membrane structure and using platinum as top and bottom electrodes. The best response of the resonators was observed at...
Measurements of dielectric properties of the homogeneous and isotropic medium in the microwave frequencies by a waveguide reflection dielectric resonator are studied. A dielectric rod sample is put inside of a rectangular cavity made by a microwave waveguide. The sample's dielectric constant and loss tangent are measured at the resonant frequency of the TE01delta mode. A simple field model of the...
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