Substrate Integrated Waveguide (SIW) is an important technology that
helps to get benefit of metal rectangular waveguides and Micostrip,
allowing for microwave circuits with high-performance, high-integrity
and low-cost. Using this technology, mic
rowave circuits with high
performance, small size and high integrity could be designed.
In this study, samples of cotton fabric were dyed using direct dye
by the traditional method as well as using microwave energy at
different energy levels. It was noted that the use of microwave
energy increase the dye exhaustion at the used energy
levels
compared to the traditional method, as well as improving the
fastness to washing and wet rubbing.
In this paper we will study the usage of equivalent circuit; in
modeling a round shaped metal cylinder in rectangular waveguide
to get filters that can be calibrated and used in the microwave
domain. We will study the structure of a rectangular re
sonant
cavity linked stimulatory through thick openings. Also a metal
shape to be calibrated in rectangular resonant cavity linked
stimulatory through thick openings. We will use matlab for showing
transition and reflection factors for the suggested filters.
In last decade, many of researches have proposed to study materials with periodic
structures,These structures can be engineered to realize novel electromagnetic properties
and to achieve behaviors that are not found in naturally materials. These ma
terials have
negative permittivity and permeability .Those are called meta-material or Left Hand
Material (LHM), They are fabricated, studied and analyzed within different applications of
microwave and optical communication. Recently, the microwave engineering applications
of artificial metamaterials have been widely discussed and various novel microwave
components were achevid for example, filters, antennas and fiber optic. This paper studys
and analyzes the reflection from fractal distribution of MMs layers in RHM medium, using
the recursive method, and applies it in the design of microwave narrow band filters.
This work aims to analyze the performance of the microwave radio link’s parameters
used to connect different systems and intra systems. Fuzzy logic technique is used to study
the difficulties of the radio link’s parameters based on type of modulati
on, and distance
between the receiver and transmitter. Four parameters are used as an input parameters for
the fuzzy logic system mainly: required power, the length of the microwave radio link,
modulation type and the signal to noise ratio(S/N). The output parameter is determined to
be the microwave link capacity.
Analytical study to select the optimal microwave radio link parameters to examine
the efficiency of the radio link capacity will be shown. Additionally, studying the input and
output memberships of the microwave radio link parameters using fuzzy logic will be
explained.
The objective of this investigation was to determine the effective of
microwave radiation on Escherichia coli contaminating milk and in white cheese manufactured of milk by traditional method.
This investigation was conducted at the laboratory of Food Science
Department, Faculty of Agriculture, University of Damascus to determine the
effectiveness and the impact of using microwave radiations to reduce or
eliminate Salmonella typhi in co
ntaminated milk and in white cheese
manufactured by traditional method made of contaminated milk.
Results showed that the duration of 60 sec. was enough to eliminate the
S.typhi from milk heated up to 90₀ C and the best treatment was when exposing
cutting cheese for a period of 240 sec, and the temperature reached 85 ?C and
for a period of 300 sec with a temperature reached 100₀C. Presence of water
helped raising the temperature of the cuttings to be equivalent to the hot water
temperature, (100₀C) and to eliminate greatly bacteria S.typhi in cutting cheese.
It was concluded that the use of microwave radiation was safety to destroy
S.typhi in milk and white cheese.
