1,721,062 research outputs found
Design and Optimization of Microwave Lumped Elements Fllters using mixed Circuital-Electromagnetic Simulations
No full textThis paper presents the design, fabrication and experimental results of the switchable band-pass lumped elements filters. The design is based on a new optimization approach that integrates mixed circuital and electromagnetic simulations. The use of horizontal internal ports and the connection of external capacitors at circuital level make the optimization procedure very efficient. A very good agreement between measurements and simulations validate the new design approach
Computer aided design of mm wave circuits fabricated on micromachined silicon
No full textThis paper presents the design methodology for the micromachined circuits operating in the microwave and mm-wave frequency region. The design is based on dividing the circuit into membrane-supported components, bulk components and membrane to bulk transitions. Every region is modeled using appropriate and techniques using full-wave electromagnetic simulation software. As illustrative examples, the design of band-pass filter structures and double-folded slot antenna arrays are briefly described. The micromachined structures were fabricated and measured results are presente
Micromachined Coplanar Millimeter Wave Band-Pass Filters
No full textIn this paper theoretical, technological and experimental results on a millimeter wave micromachined band-pass filter are presented. The design is based on the image parameters representation of two-port networks, and the device has been realized on a trilayer dielectric membrane. A good agreement between numerical and experimental data has been obtaine
Micromachined hybrid integrated receiver modules for 38 GHz and 77 GHz, on silicon substrate, technology and manufacturing
No full textThis paper present the fabrication process for the manufacturing of hybrid integrated receiver modules for 38GHz and 77GHz operating frequency, on micromachined silicon substrate. The hybrid receiver structures consists in a membrane-supported antenna as well as a GaAs Schottky detector diode, a matching network and a low-pass filter on a bulk material area of the chip.
The technological process as well as the manufacturig characteristics are presented.
AFM, SEM, and White Light Interferometry have been used. for microphysical characterizatio
Modelling, design and realization of micromachined millimeter-wave band-pass filters
No full textThis paper describes the design, the realization and the experimental characterization of a micromachined band-pass filter with a working frequency of 38 GHz. The synthesis of the structure has been carried out by means of the image parameter representation of two-port networks. A coupled line coplanar configuration has been adopted for the filtering network. The good agreement between theoretical and experimental results demonstrates the validity of the proposed design approach
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Design, Manufacturing and Characterization of membrane supported Antennas for 38 GHz Wireless Applications
No full textNew configurations of double slot CPW feed micromachined antennas arrays were realized on a 1.5um thin three-layer dielectric membrane fabricated on Si and GaAs substrates. The antennas were designed for 38 GHz operating frequenc
Computer-Aided Design for Membrane Supported mm-Wave Circuits
No full textThis paper presents the design methodology for the micromachined circuits operating in the microwave and mm-wave frequency region. The design is based on dividing the circuit into membrane-supported components, bulk components and membrane to bulk transitions. Every region is modeled using appropriate and techniques using full-wave electromagnetic simulation software. As illustrative examples, the design of band-pass filter structures and double-folded slot antenna arrays are briefly described. The simulation results are compared with experimental dat
Circuital and electromagnetic modeling of bulk and membrane supported lumped elements for microwave and millimeter wave applications
No full text- …
