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 67 for “"network analyzer"”.
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A low-cost pulsed Fourier transform network analyzer.
… development a low-cost pulsed Fourier transform network analyzer which can be used to measure the electrical properties of materials. New silicon-germanium integrated circuits allow for the pulse system to be implemented for under $300.
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Development of a real-time automatic network analyzer measurement system
… with the development of a real-time automatic Network Analyzer measurement system based on Hewlett Packard's manual HP8410C. The major limitation in non real-time systems is the time required to perform a measurement. Real-time systems have greater measurement speed than their non real-time …
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Using an Agilent E5071B Vector Network Analyzer and Rotating Platform
… and implemented using an Agilent E5071B Vector Network Analyzer and a rotating pedestal. The two ports of the device are used as a transmitter and receiver, measuring the frequency domain data of the scene in front of the antennas at each angular position as the rotating pedestal rotates in …
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Power system stability evaluation using the miniaturized A-C network analyzer
… methods. Present-day techniques, using network analyzers, cut the amount of work ad time considerably. For handling problems which are too complicated for conventional computation but too small to justify time on the large network analyzer are available, miniaturized network analyzers …
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Online Identification, Monitoring, and Control of A Dc/Dc Converter System Using Digital Network Analyzer Techniques
… controller can also act as an online digital network analyzer capable of identifying a converter and its surrounding distribution system, including system interactions, in real time. This method is non-parametric and does not assume a particular model structure, but measures the converter as …
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Obstacle avoidance robot applying fuzzy control system
… glass with FSS structure was also analyzed using network analyzer. The result of computer simulation was confirmed and consistent with the network analyzer results that showed the improvement of SnO2 coated glass with the FSS structure. Thermal analysis demonstrated that FSS structure had allows …
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Fabrication of frequency selective structure and evaluation of microwave transmission on energy saving glass
… glass with FSS structure was also analyzed using network analyzer. The result of computer simulation was confirmed and consistent with the network analyzer results that showed the improvement of SnO2 coated glass with the FSS structure. Thermal analysis demonstrated that FSS structure had allows …
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Fabrication of frequency selective structure and evaluation of microwave transmission on energy saving glass
… glass with FSS structure was also analyzed using network analyzer. The result of computer simulation was confirmed and consistent with the network analyzer results that showed the improvement of SnO2 coated glass with the FSS structure. Thermal analysis demonstrated that FSS structure had allows …
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Novel modulated antennas and probes for millimeter wave imaging applications
… and designing a simple and accurate vector network analyzer (VNA) for in-situ imaging applications. The concept of modulating millimeter wave antenna and scatterer structures, directly to increase the overall system sensitivity and reduce the image acquisition time, is central to the …
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Energy deposition into heavy gas plasma via pulsed inductive theta-pinch
… using a Helmholtz coil driven by a vector network analyzer and a pulsed-power system. Calibration in a pulsed-power environment yielded calibration factors at least 9.7% less than the vector network analyzer.</p> <p>In the second paper, energy deposition into various gases using a pulsed …
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Performance Analysis of Multicomputer Interconnection Network Designs
… issues of multicomputer interconnection networks are addressed. Analytic models are used to evaluate the performance of large scale multicomputer networks. Performance is measured as the average end-to-end delay between communicating nodes. The models consider the communication processing …
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Observing the Sedimentation of TiO2 Nanoparticles in Aqueous Solution Using a Quartz Crystal Microbalance with Dissipation Monitoring
… monitoring (QCM-D) is explored. Using a vector network analyzer (VNA) to measure harmonic ranges from the primary to the 89th harmonic of a 5 MHz crystal. The fast read and processing ability of the VNA let us monitor the change in frequency, full width at half max, and amplitude. This data …
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Dielectric properties of polymers at microwave frequencies
… end group concentrations. The Hewlett-Packard network analyzer has been used to measure both the real and imaginary parts of the dielectric in the frequency range of 1-18 GHz. Both coaxial airline and waveguide techniques were used.
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A calibrated dual-port acoustic Vector Network Analyser
The Vector Network Analyzer (VNA) is a workhorse in electrical engineering, and has been refined over the last fifty years to offer many advantages. This technology is continually expanding and branching into other fields including optics. This thesis presents the design and calibration of an …
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Design and Implementation of an Analog High Power Broadband Self Interference Canceller for In Band Full Duplex
… on a four layer PCB and measured with a network analyzer. Simulated results for variable attenuator and overall vector modulator are presented.
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High Frequency Study of Magnetic Nanostructures
… <p>In part two we focused on using the Vector Network Analyzer (VNA) to measure the Ferromagnetic Resonance (FMR))of various magnetic Nanowire arrays. We employed different measurement geometries using microstripline and coplanar waveguide as microwave transmission lines.</p> <p>In part three …
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Transmission line simulation for transient network analyser at Virginia Tech
… of a transmission line for a Transient Network Analyzer was designed. The pi sections modeled single and double circuit lines at 34.5, 69, 138, 345 and 765 KV levels. Representations of mutual impedances produced by nontransposition and mutual impedances and electrostatic coupling in …
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Development of a frequency-domain electromagnetic scattering measurement system
… frequency Cw waveform and utilizes an HP-8510B network analyzer as an RF front- end and a coherent receiver. A pair of AEL H1498 antennas was installed to cover a frequency range of 2 GHz to 18 GHz. An HP-82300C BASIC Language Processor was installed on a COMPAQ Deskpro-386 PC, and an HP-BASIC …
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Development of triple band planar inverted F-antenna (PIFA) for GSM 800 MHz, DCS 1800 MHz and Bluetooth 2400 MHz
… fabricated, assembled together and tested using network analyzer. The result obtained for the S11 parameter in measurement for the three bands are 0.966 GHz, 1.836 GHz and 2.50 GHz with return loss of -25.84 dB, -32.52 dB and -24.2 dB respectively. Comparison for the measurement and the …
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Development of triple band planar inverted-H antenna for DCS, WIMAX and WLAN application
… and assembled together and tested using network analyzer. The result obtained for the S11 parameter in measurement for the three bands are 1.764 GHz, 2.739 GHz and 3.17 GHz with return loss of -15.14 dB, -15.88 dB and -25.77 dB respectively. Comparison for the measurement and the …
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