Characterization Techniques for Thin and Thick Ferroelectric Films

A few measurement techniques are presented for characterization of thin and thick ferroelectric films at microwave frequencies. Broadband reflection type measurements using a probe station are considered for on wafer characterization of thin films. The accuracy of the method is analyzed with respect to measurement residual systematic errors. A test structure is introduced allowing quick and accurate extraction of the film parameters based on the rigorous full-wave model. Two measurement techniques are reported for electrode-less characterization of thick ferroelectric films. The first method (X-band) is based on the reflection type measurement of a resonator established by a layered alumina/ferroelectric sample loaded in a cut-off waveguide. The second method (B-band) utilizes an open resonator (OR) technique. Theoretical and experimental results are presented

Full wave analysis of coupled strip-slot guiding structures

In this paper, the coupled strip-slot lines are modeled using hybrid mode analysis. Standard spectral-domain analysis is employed to solve the eigenvalue problem in multilayered media and a novel formulation is proposed to obtain strip and slot modal impedances. Comparisons with available published data are presented. The model is used to obtain scattering parameters of a bandpass filter with a novel topology. These scattering parameters are then compared with those obtained using rigorous Sonnet simulations, thereby confirming the reliability of the model

Analysis of trcuncated 2D periodic structures

A multiport admittance/impedance matrix for the truncated 2D periodic structure is derived via expansion of node voltages and currents in terms of Floquet`s waves. It is shown that for uniaxial propagation, the structure comprised of a finite number of columns/rows is identical to multicoupled lines with properly defined parameters. The 4x4 unit cell array fed at different sides is analyzed using the developed formulation. The results are then verified with a rigorous Sonnet simulation, thereby confirming the validity of the presented approac

Analysis of trcuncated 2D periodic structures

A multiport admittance/impedance matrix for the truncated 2D periodic structure is derived via expansion of node voltages and currents in terms of Floquet`s waves. It is shown that for uniaxial propagation, the structure comprised of a finite number of columns/rows is identical to multicoupled lines with properly defined parameters. The 4x4 unit cell array fed at different sides is analyzed using the developed formulation. The results are then verified with a rigorous Sonnet simulation, thereby confirming the validity of the presented approac

Full wave analysis of coupled strip-slot guiding structures

In this paper, the coupled strip-slot lines are modeled using hybrid mode analysis. Standard spectral-domain analysis is employed to solve the eigenvalue problem in multilayered media and a novel formulation is proposed to obtain strip and slot modal impedances. Comparisons with available published data are presented. The model is used to obtain scattering parameters of a bandpass filter with a novel topology. These scattering parameters are then compared with those obtained using rigorous Sonnet simulations, thereby confirming the reliability of the model

Low loss left-handed media using dielectric ring resonators

A low loss left handed 1D media using thick film technology is proposed in this work. The design uses a rectangular cut off waveguide periodically loaded by high permittivity dielectric ring resonators. These are considered as a low loss replacement for the split-ring resonators (SRR), responsible for magnetic activity of the media. Simulations are made using eigen-mode solver of HFSS. There the periodic boundary conditions are utilized to emulate the effect of the infinite media. The analysis reveals the propagation of the backward waves below the cut off frequency of the WG indicating left handedness of the propagation media. Another pass-band with the forward wave exists below the cut off of the WG. It is shown that two first pass-bands can be linked so that continuous backward-to-forward transmission is observed

Design of the Compact Band-Pass Filter Utilizing Dielectric Loaded

A design of a compact Ku-band four pole band-pass filter is reported. The filter is based on twodual-mode dielectric loaded waveguide (WG) resonators providing a significant reduction of the sizesas compared to its single mode counterpart. Each resonator is comprised of a square shaped cut-offwaveguide loaded with a silica glass plate. The filter is realized using a quadruplet cell, which allowstwo symmetric transmission poles to be placed at an arbitrary distance from the pass-band edges. Thisis a welcome feature making this filter useful for both Tx and Rx duplexer channels. A number ofnumerical issues are addressed concerning the modelling using High Frequency Structure Simulator(HFSS). Experimental results are compared with the simulations validating the design approach