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 16 of 16 for “"coplanar waveguide (CPW)"”.
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Design and Analysis of an Electronically Steerable Microstrip Patch and a Novel Coplanar Waveguide (CpW) Fed Slot Antenna Array
… Then the study and design of a wideband Coplanar Waveguide (CPW)-fed slot phased array antenna is presented. In both cases the array beam scanning properties are elucidated by incorporating the measured delay line scattering parameters inside Ansys Designer simulation models and then …
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Impedance measurements at W-band using an array of bismuth microbolometers
The voltage standing wave on a coplanar waveguide (CPW) is measured at W-band (75-110 GHz) using an array of bismuth microbolometers placed over the CPW. From this information, the impedance of the load at the end of the line can be determined in addition to the propagation and attenuation constant …
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QUBIT COUPLED MECHANICAL RESONATOR IN AN ELECTROMECHANICAL SYSTEM
… transmon which is embedded in a superconducting coplanar waveguide (CPW) cavity. The difficulty of achieving high quality of superconducting qubit in a high-quality voltage-biased cavity is overcome by integrating a superconducting reflective T-filter to the cavity. Further spectroscopic and …
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Superconducting coplanar delay lines
… and measured. One is based on the conventional coplanar waveguide (CPW), and the other based on a conductor-backed coplanar waveguide (CBCPW). Systematic design work is presented in this thesis on the calculations of transmission-line parameters, the selection and optimisation of delay line …
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Design a high gain UWB mimo uniplanar monopole antenna with FSS array for metallic object microwave imaging
… uniplanar hexagon UMB monopole antenna with a coplanar waveguide (CPW) feed is designed. The proposed UMB antenna has an oscillate impedance (za) of 50Ω. A meander-line notch filter is loaded on the designed antenna that achieves a high rejection (S11=-1.75 dB) at the band of 3.0 GHz for 5G …
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Computational Design of the Electrical and Mechanical Performance of Steerable MEMS Antennas
… antennas presented were broadband and fed by a coplanar waveguide (CPW) transmission line which traversed the hinge structure. The antenna's orientation in space was designed to be changed through electrostatic actuation of the antenna platform's hinges.</p> <p>The goal of this thesis was to …
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BULK TITANIUM WAVEGUIDE- A NEW PLATFORM FOR UNIPLANAR MICROWAVE CIRCUITS AND RFMEMS
… lines of two basic topologies: Microstrip and Coplanar Waveguide (CPW). Microstrip offers low loss, while suffering from large circuit size, high dispersion, poor design flexibility, and the necessity of large via holes. CPW improves upon microstrip by bringing the ground to the same level as …
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Enabling Hybrid Optical-Microwave Space Communications with Optically Transparent RF Components Using Indium Tin Oxide (ITO)
… solar efficiency. Utilizing 4-point probes and coplanar waveguide (CPW) ground signal ground (GSG) probes, we investigated the electrical properties of ITO, including conductivity, permittivity, and loss tangent, and ensured the material's suitability for space conditions and electrical …
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An investigation of nanoscale materials and their incorporation in patch antenna for high frequency applications
… a good agreement with the simulated results. The coplanar waveguide (CPW) diamond-shaped MPA working in the MMW region was designed and fabricated with polymer materials as substrates using thermal evaporation technique and the RF measurement was carried out using Vector Network Analyser (VNA). …
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Atomically thin microwave biosensors
… graphene in a broadband radio-frequency (RF) coplanar waveguide (CPW). To combine both electrochemical and dielectric sensing concepts, a graphene channel is inserted into the CPW, which can then be functionalised using standard chemical processes developed for graphene direct-current (DC) …
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Investigation into the design of ultra-wideband (UWB) and multi-band antennas
… selection. Next, we considered the use of coplanar waveguide (CPW) fed printed UWB antenna for compact, body-worn applications. We investigated the antenna performance using empirical optimisation. The work on CPW-fed printed antennas has led to the development of multi-band antennas also. …
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Superconducting Microwave Resonators for Low Loss Sensor Applications
… then use this model to analyse the behaviour of coplanar waveguide (CPW) resonators. Using connection matrix theory, I design a half-wavelength resonator capacitively coupled a readout line, and outline the design of the test system and data analysis software used to analyse them. I present …
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Advanced Manufacturing and Dielectric Material Characterization Techniques for High-Temperature mm-Wave Antennas
… used to create a multilayer configuration of a coplanar waveguide (CPW).</p> <p>Performing RF probing on the CPW structure and measuring its S-parameters allows for the determination of the permittivity by extracting the propagation characteristics and then performing an analysis with conformal …
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Design and modelling of beam steering antenna array for mobile and wireless applications using optimisation algorithms. Simulation and measrement of switch and phase shifter for beam steering antenna array by applying reactive loading and time modulated switching techniques, optimised using genetic algorithms and particle swarm methods.
… antenna beam steering was investigated. A coplanar waveguide (CPW) to coplanar strip (CPS) transition was adopted to feed the printed dipole. A novel RF switch circuit, used to control the RF signal fed to the dipole antenna and placed directly before it, was proposed. The measured …
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Efficient Finite Element Electromagnetic Analysis for High-Frequency/High-Speed Circuits And Multiconductor Transmission Lines
This dissertation comprises the following four components. (1) Development of a robust and efficient 3-D finite element electromagnetic field solver with high-order vector elements for high-frequency and high-speed circuit simulations. The solver supports wave port and lumped port excitations as …
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Structure and Optimisation of Liquid Crystal based Phase Shifter for Millimetre-wave Applications
… 0-10V AC bias and structured in a novel enclosed coplanar waveguide (ECPW) including an enclosed ground plate in the design, which significantly reduces the instability due to floating effects of the transmission line. This structure screens out interference and stray modes, allowing …