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- 2018
- Solar Photovoltaic (SPV)
- Fuzzy Logic Control (FLC)
- MATLAB/Simulink
- Simulation
- Variable Step Size Incremental Conductance (VSS InC)
- Maximum Power Point Tracking (MPPT)
- Electrical Engineering and Automation
- Cochin University College of Engineering
- T.K.M College of Engineering
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DESIGN OF NOVEL COMPACT TRI-BAND BANDPASS FILTER WITH CONTROLLABLE FREQUENCIES AND HIGH SELECTIVITY
摘要： This paper presents a compact tri-band bandpass ?lter (BPF) with high selectivity. The proposed ?lter utilizes novel stub-loaded quarter-wavelength resonators and conventional uniform quarter-wavelength resonators. The latter is embedded in the former, and they are separated by a feed line. Due to these quarter-wavelength resonators, the total size is greatly reduced. Moreover, the passband frequencies can be controlled individually. To enhance its selectivity, source-load coupling is employed. For demonstration, an experimental ?lter is implemented. High skirt selectivity and suppression levels are observed in the measured results. The circuit area of the ?lter is 0.17λg × 0.19λg, featuring compact size.
关键词： high selectivity,compact size,stub-loaded quarter-wavelength resonators,tri-band bandpass filter,source-load coupling
更新于2025-09-04 15:30:14
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Characterization of light flash signatures created by hypervelocity impact LY12 aluminum spacecraft shield material
摘要： Space debris is considered as a serious threat to man’s utilization and exploration of space. While some information is available on the material composition of orbital debris, most measurements of projectile size and velocity distributions can not distinguish material compositions and type. The analysis and understanding of impact ?ash signatures can determine projectile’s size and impact velocity distributions for projectile segregated by material composition and type. This paper based on the derivation of the shock jet initiated model for light ?ash and an understanding of how material shock properties govern the ?ash signature arising from the impact of a spherical projectile against a target. Analytical results are presented that identify the most promising target materials with respect to producing impact ?ash signatures that can characterize size effect of spherical projectile, impact angle and impact velocity effects during LY12 aluminum projectile hypervelocity impact LY12 aluminum spacecraft shield material.
关键词： Hypervelocity impacts,pyrometer,LY12 aluminum projectile,light ?ash,projectile’s size and impact velocity effects
更新于2025-09-04 15:30:14