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 10 of 10 for “"meander line"”.
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Multi-Angle Beam Generation and Steering via Meander-Line-Coil EMATs
This thesis investigates Meander-Line Coil (MLC) Electromagnetic Acoustic Transducers (EMATs) for the purposes of Non-Destructive Testing (NDT), focusing on their theoretical foundations, simulated modelling, and experimental validations. Whilst the detection of defects was not investigated, this …
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Research and Development of Low-Profile, Small Footprint Antennas for VHF-UHF Range Applications
… is to exploit the broadband characteristics of meander-line and helical (or "spiral") antennas typically applied in the microwave frequency range to the UHF-VHF range. I will also propose novel antenna geometries that combine spiral and meander-line properties and analyze their performance. …
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Tunable microwave filters using ferroelectric thin films
… element lowpass filter incorporating integrated meander line inductors and BST parallel plate capacitors is implemented on a high resistivity silicon substrate and demonstrates 32.1 % tuning of the cut-off frequency at 15 V. A combline bandpass filter employing integrated BST parallel plate …
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Development of wideband phased array antenna
… antenna was realized by adding one element and meander line T-divider, partial ground plane and two slots at ground plane. The antenna was designed and optimized using CST Microwave studio (CSTMWS). The proposed antenna‟s parameters were optimized with various options such as differing the …
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Superconducting coplanar delay lines
Two 25 ns wideband HTS delay lines with a novel double-spiral meander line (DSML) structure are designed, fabricated 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 …
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Analysis and solutions for RFID tag and RFID reader deployment in wireless communications applications. Simulation and measurement of linear and circular polarised RFID tag and reader antennas and analysing the tags radiation efficiency when operated close to the human body.
… been successfully employed to design examples: meander-line, two linear cross elements and compact Helical- Spiral antennas. In addition, a hybrid method to model the human body interaction with RFID tag antenna operating at 900MHz has been studied. The near field distribution and the radiation …
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Design, Fabrication, and Measurement of a Multiple-Input Multiple-Output (MIMO) Antenna for Mobile Communication
… hybrid monopole antenna coupled to a meander line element and parasitic structures. The 115×55×1.54 mm antenna was fabricated using an FR4 composite material and occupies only a fractional volume within the size of an average cellular phone allowing ample space to integrate with …
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Design a high gain UWB mimo uniplanar monopole antenna with FSS array for metallic object microwave imaging
… 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 mid-band. A T-strip is inserted between the two proposed MIMO antennas to improve the isolation. Moreover, the …
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Efficiency Improvement of RF Energy Transfer by a Modified Voltage Multiplier RF DC Converter
… RF transfer system experimentally, microstrip meander line antennas and microstrip patch antenna arrays are designed for different ISM bands, where relevant requirements for RF energy transfer are respected. For each antenna a modified voltage multiplier RF DC converter circuit has been applied …