Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"stripline"”.
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Characterization of materials using stripline resonators
This thesis describes a method for using stripline resonators to characterize the electrical properties of materials used in the construction of planar geometry transmission lines and circuits. The method characterizes both dielectric and conductor materials. It can be used to find the relative …
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A Method of Moments Solution of Stripline Discontinuity Problems
… series acceleration technique to the infinite stripline problem constitutes the second topic. In this application, the cutoff frequencies, model currents, and field distributions are found from a method of moments solution of an electric field integral equation. Finally, the scattering …
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Suspended stripline filters for ultrawide bandwidth and high RF power
… peak power ultra-wideband filters in suspended stripline. Ultra-wideband pre-selector filters play a vital role in current electronic warfare systems as they are expected to cover a wide passband and handle high power simultaneously. Suspended stripline filters provide a good compromise solution …
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Optimization Study of the Stripline Resonator Technique for Dielectric Characterization
… at microwave frequencies is the coplaner coupled stripline resonator technique. This technique is an enhancement to the classical stripline resonator technique. In this technique, the measured resonance frequency and quality factor of the resonator are used to determine the complex permitivity. …
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Composite Right-Left Handed Stripline Structures for Antenna Array Feed Networks
… this dissertation composite right/left-handed striplines are proposed as viable key structures in antenna array applications, enabling reduction of the overall feed network sizes as well as allowing integration opportunities and possible reduction of radiating beam pattern distortions.</p> <p>A …
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Experimental study of realization of stable antenna patterns using a stripline fed slot array
U of I Only Restriction set for Item 123057 on 2022-04-19T18:05:20Z with date by eliasbh2@illinois.edu.
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FAR-END CROSSTALK MODELING AND PREDICTION FOR HIGH-SPEED PCB DESIGN WITH INHOMOGENEOUS DIELECTRIC LAYERS (IDLS)
… in fabricated printed circuit boards (PCB). The stripline is laminated by multiple inhomogeneous dielectric layers (IDL). The dielectric layers of the stripline are laminated with epoxy resin and glass bundles. The dielectric permittivity of the epoxy resin and glass bundles are different, which …
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Time domain synthesis applied to modeling of microwave structures and material characterization
… permittivity and the complex permeability in a stripline geometry is presented. The new technique uses both Time Domain Reflectometry (TDR) and Time Domain Transmission (TDT) measurements for determining an optimum frequency dependent lossy transmission line model for the stripline under test. …
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Digitally controlled microstrip phased array.
… array consists of three parts: firstly, eight stripline 3-bit-PIN diodes-controlled hybrid ring coupled phase shifters, secondly, an equi-spaced half-wavelenth linear array of 8 square microstrip patch antennas and lastly, a stripline 8-way hybrid ring reactive corporate feed. A simple …
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Cavity-backed T-fed slot antenna
… of feeding a thin cavity slot antenna with a stripline leading to a T-bar, which lies beneath or in the slot, greatly enhances the impedance bandwidth over a range of 10 to 30 percent depending on the slot width.
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A Dual Resonant Microstrip Antenna for UHF RFID in the Cold Chain Using Corrugated Fiberboard as a Substrate
… superior solution compared to conventional stripline dipole antennas widely used in commodity tags.
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Micromachined microwave filters
… is compact compared with a microstrip or a stripline, and gives better loss performance. Through this thesis, the way of optimising the square coaxial transmission line to provide a low loss will be presented, which will end in the presentation of one dielectric supported coaxial structure …
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Low loss microwave power combiners/dividers
… culmination of this work a low loss 8-way planar stripline combiner/divider was constructed that gave a peak combining efficiency of 94 percent which approaches the combining efficiency of 98 percent that was obtained with the cylindrical resonant cavity combiner. The former offers its broader …
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Experimental studies of multipass beam breakup and energy recovery using the CEBAF injector LINAC
… consisted of a series of RF measurements using a stripline kicker to deflect the beam to excite cavity HOMs and a superconducting cavity as a pickup device to detect HOM signals. The lll (normalized) amplitude of the cavity HOM signal was measured as a function of the average CW beam current for …
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Study of nonlinear microwave properties of high-temperature superconducting film
… of a dielectric-resonator technique and a stripline-resonator technique. We have concluded that patterning process contributes to neither the low-power surface resistance nor the power dependence of the surface resistance. To understand the grain-boundary contributions to the nonlinear …
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Investigation, design and implementation of circular-polarised antennas for satellite mobile handset and wireless communications. Simulation and measurement of microstrip patch and wire antennas for handheld satellite mobile handsets and investigations of polarization polarity, specific absorption rate, and antenna design optimization using genetic algorithms.
… Antennas (QSAs), two arm Square Spiral and stripline or coaxially-fed microstrip patch antennas are developed and tested. These antennas are investigated and discussed to operate at L band (1.61-1.6214GHz) and ISM band (2.4835-2.5GHz) A substantial size reduction was achieved compared to …
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STUDY OF MULTI- AND BROAD-BAND INTERNAL ANTENNAS FOR MOBILE APPLICATIONS
… aperture coupling annular-ring antenna fed by stripline is the hybrid structure of the aperture coupling feed MSA and the proximity feed MSA. The proximity feed enable to concentrate the field strength toward the direction of the radiating element and the modified aperture layer contributes to …
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Architectural & circuit level techniques to improve energy efficiency of high speed serial links
… at the ends of 60$\,$inch and 96$\,$inch stripline channels are 78$\,$mV/0.6$\,$UI and 8$\,$mV/0.3$\,$UI, respectively. This transmitter achieves an energy efficiency of 3.1$\,$mW/Gb/s while compensating for 16-28$\,$dB channel loss, which compares favorably with the state-of-the-art. In …
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Characterization of the Integration of Additively Manufactured All-Aromatic Polyimide and Conductive Direct-Write Silver Inks
… was able to decrease the gap in microwave stripline transmission line performance when compared with ULTEM 1010 processed at 200°C, with peak 10 GHz S21 loss differences decreasing from 2.46 dB to 1.32 dB after increasing the UV-DIW processing temperature from 200 °C to 400°C.
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Electron Beam Diagnostic at the ELBE Free Electron Laser
… the framework of this effort. The design of our stripline BPM, the corresponding electronics and software is described in Chapter #4 along with the system performance as measured with the ELBE beam.
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