A wide‐angle forward to backward scanning wideband leaky‐wave antenna based on microstrip spoof surface plasmon polaritons

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Micromachined conductor backed coplanar waveguides for millimeter wave circuit application

336-344Conductor Backed Coplanar Waveguide (CBCPW) lines on Si micromachined substrate are in use for more than a decade, but their detailed analysis is still not available in the open literature. This paper presents design data and closed form expressions on characteristic parameters of CBCPW lines on Si-micromachined structures that are valid up to 40 GHz. Effect of various physical parameters are studied. Procedure for deriving lumped equivalent circuit models for discontinuities on Si-Micromachined substrate as a function of discontinuity physical parameters is also presented. Scattering parameters obtained from equivalent circuit models agree well with those obtained from full wave FEM for all the discontinuity structures. To show the usefulness of the data generated on discontinuities, design of a Ka-band band pass filter is described. The results presented are useful in designing micromachined components at microwave and millimeter wave frequencies

Studies on RF MEMS shunt switch

387-394Radio Frequency Micro-Electro-Mechanical-Systems (RF MEMS) based switches are expected to play a key role in the field of microwave switching. Traits like low-loss performance; zero-power consumption and very low inter-modulation distortion have made these switches well suitable for high-performance microwave and millimeter-wave circuits. The design of RF MEMS switches, however, require sophisticated modeling techniques because of their complicated 3-D geometries with critical aspect ratios and strong in-homogeneities. In this paper, the effect of various geometric dimensional parameters on the electromagnetic and mechanical behaviour of a shunt capacitive MEMS switch using finite element method based Ansoft High Frequency Structure Simulator (HFSS) software tool has been presented. This exercise will provide a better insight into designing a reliable and high-performance MEMS shunt switch