This short paper presents the concept of particle swarm optimization technique applied for the design of broadband microwave amplifiers. The method that is developed is based on Particle Swarm Optimization (PSO) technique applied to a compensated matching network on a single stage transistor amplifier to get the best optimized result in the design. To prove the concept four different operating ...

A continuous flow reactor equipped with a low-loss flow channel and a microwave cavity was developed for synthesizing nanophosphors. A continuous solution synthesis of YVO4:Eu,Bi nanophosphor was succeeded through the rapid hydrothermal method using this equipment. Internal quantum efficiency of YVO4:Eu,Bi nanophosphor obtained by 20 minutes microwave heating is about 30% at 320 nm as high as t...

background: pentachlorophenol (pcp) is one of the most fungicides and pesticides. acute and chronic poisoning from pcp may be occurred by dermal absorption, and respiration or ingestion. with respect to health and environmental effects of pcp, many methods were considered regarding its removal. microwave assisted other methods are environmental friendly, safety, and economical method, consequen...

Abstract: Microwave processing is one of the novel methods for combustion synthesis of intermetallic compounds andcomposites. This method brings about a lot of opportunities for processing of uniquely characterized materials. In thisstudy, the combustion synthesis of TiAl/Al2O3 composite via microwave heating has been investigated by thedevelopment of a heat transfer model including a microwave...

In alkaline medium the benzil reacts with urea or thiourea in presence of base like 30% w/v NaOH, using ethanol as solvent to give the cyclic hydantoin compounds, or phenytoin (5,5’dipenylimidazolidine-2,4-dione) and thiohydantoin (5,5-diphenyl-2-thioimidazolidine-4-one) respectively. The first step in the reaction involve the attack by urea or thiourea on the carbonyl group of the benzil to gi...

One-step facile synthesis of monoporous polymer microspheres via microwave-controlled dispersion polymerization is introduced. This template-free method employing the dispersion polymerization of styrene under microwave irradiation induces directly the formation of uniform monoporous polymer microspheres, with controllable morphologies and sizes, which can be tuned by simply adjusting parameter...

We demonstrate a novel method for spectral analysis of microwave signals that employs time-domain processing in fiber. We use anomalous dispersion in single-mode fiber to perform a Fresnel transform followed by a matched amount of dispersion-compensating fiber to perform an inverse Fresnel transform of an ultrashort pulse. After the Fresnel-transformed waveform is modulated by the microwave sig...

A microwave assisted extraction technique was developed to optimize the extraction of mucilage from the fruits of Abelmoschus esculentus plant. The plant has been extracted by conventional and microwave assisted methods for the isolation of mucilage. Microwave extraction at 160 W intensity and 40 min heating duration increase 11.55% in the yield of mucilage when compared to 1 h conventional hea...

This paper presents the Waveguide Filter Design (WFD) program using principle of electromagnetic wave theory and Wave Iterative Method (WIM) based on propagation of incident, reflected and transmitted waves in the waveguide for microwave engineering education. After the surveying by questionnaire about the nature in the microwave engineering course, the instructors found that the microwave engi...

Microwave technology is a highly effective approach to fast and uniform heating. This article investigates that the microwave heating as a novel method is used to rapidly foam and actuate biocompatible and biodegradable shape memory crosslinked-polycaprolactone (c-PCL) foams. The optical microscope proves that the resulting c-PCL foams have homogenous pore structure. Mechanical behavior and sha...