Search results for "High-gain antenna"

showing 4 items of 4 documents

Using an Adaptive High-Gain Extended Kalman Filter With a Car Efficiency Model

2010

The authors apply the Adaptive High-Gain Extended Kalman Filter (AEKF) to the problem of estimating engine efficiency with data gathered from normal driving. The AEKF is an extension of the traditional Kalman Filter that allows the filter to be reactive to perturbations without sacrificing noise filtering. An observability normal form of the engine efficiency model is developed for the AEKF. The continuous-discrete AEKF is presented along with strategies for dealing with asynchronous data. Empiric test results are presented and contrasted with EKF-derived results.Copyright © 2010 by ASME

0209 industrial biotechnologyHigh-gain antennaEngineeringbusiness.industry020208 electrical & electronic engineering02 engineering and technologyKalman filterFilter (signal processing)Invariant extended Kalman filter[SPI.AUTO]Engineering Sciences [physics]/AutomaticExtended Kalman filter020901 industrial engineering & automationControl theoryEngine efficiency[ SPI.AUTO ] Engineering Sciences [physics]/Automatic0202 electrical engineering electronic engineering information engineeringFast Kalman filterObservabilitybusinessComputingMilieux_MISCELLANEOUS
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A circularly polarized wideband high gain patch antenna for wireless power transfer

2018

This article deals with a microstrip patch antenna working at 868 MHz, suitable for the radio frequency wireless power transfer and energy harvesting applications. The proposed monolithic antenna is compact, lightweight and it is printed on a thick substrate in order to maximize the total gain in the broadside direction. The antenna radiates at 868 MHz with a fractional impedance bandwidth of 5% and it shows a gain of 4.14 dB.

High-gain antennaAtomic and Molecular Physics and OpticComputer science02 engineering and technologyCondensed Matter PhysicSettore ING-INF/01 - Elettronicawireless energy transferAtomic and Molecular PhysicsElectronic0202 electrical engineering electronic engineering information engineeringcapacitive compensation; enhanced gain antenna; radiofrequency energy harvesting; wireless energy transfer; Electronic Optical and Magnetic Materials; Atomic and Molecular Physics and Optics; Condensed Matter Physics; Electrical and Electronic EngineeringOptical and Magnetic MaterialsWireless power transferWidebandElectrical and Electronic EngineeringPatch antennabusiness.industryElectronic Optical and Magnetic Material020208 electrical & electronic engineeringElectrical engineering020206 networking & telecommunicationsradiofrequency energy harvestingCondensed Matter PhysicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialscapacitive compensationenhanced gain antennaand Opticsbusiness
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Anode current saturation of ALD-coated Planacon MCP-PMTs

2018

We have measured and compared the characteristics of ALD-coated Planacon MCP-PMTs (XP85112/A1-Q-L) with their non-ALD counterparts (XP85012/A1-Q). While the later show excellent performance, the ALD-coated sensors have surprisingly low current saturation levels (~two orders of magnitude lower than expected) and extremely high gain recovery time (more than 7 orders of magnitude higher than expected). We suspect that these problems might be caused by the unexpected side-effects of the ALD process. To make a definite conclusion, more samples need to be tested, preferably from different production runs. If our observation were confirmed, it would mean a serious technological setback for ALD-coa…

High-gain antennaMaterials sciencePhysics - Instrumentation and Detectors010308 nuclear & particles physicsbusiness.industryFOS: Physical sciencesInstrumentation and Detectors (physics.ins-det)01 natural sciencesAnode0103 physical sciencesOptoelectronics010306 general physicsbusinessInstrumentationSaturation (magnetic)Mathematical Physics
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Flashlamp-pumped Nd:KGW laser in MOPA configuration: comparative study of several rods

1999

The laser performance of the Nd:KGW crystal has been studied in a master oscillator and power amplifier configuration (MOPA). Several crystals from two different producers were investigated for the oscillator and the amplifier. A maximum single-pass gain of 25 was observed in free-running and Q-switched mode. We obtained a maximum output amplified energy of 400 mJ at 30 Hz (with a pulse duration of 10 to 30 ns) with a divergence less than 3 mrad. We also studied the limitations of this configuration due to the very high gain of the Nd:KGW crystal.

Quantum opticsHigh-gain antennaMaterials sciencePhysics and Astronomy (miscellaneous)business.industryAmplifierGeneral EngineeringGeneral Physics and AstronomyPulse durationLaserRodlaw.inventionCrystalMaster oscillatorOpticslawbusinessApplied Physics B: Lasers and Optics
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