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Register a new userImproving bandwidth of fractal antenna
تحسين عرض مجال الهوائي التجزيئي
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تم في هذا البحث دراسة التغير في هندسة المستوى الأرضي للهوائي التجزيئي و أثره على عرض الحزمة و ذلك عند أكثر من حزمة ترددية، و كانت النتائج التي تم التوصل لها مشجعة، حيث تم التوصل إلى هوائي تجزيئي متعدد المجالات الترددية و بعرض حزمة يصل إلى أكثر من 100%.
changing in the ground plane for the fractal antenna has been studied in this research and its effects on the antenna frequency bandwidth for more than frequency bands, results are encouraging, where we get multi band fractal antenna with wide BW for more than 100%.
References used
Amandeep Kaur, 2013 – Design And Simulation of Sierpinski Pre fractal Antenna Using HFSS, International Journal on Recent and Innovation Trends in Computing and Communication, Vol. 1, Issue 10, 4P
Ancy P V, Satya Bhushan Sukla, A K Prakash, K Mukundan, 2014 – Multiband Fractal Antenna for wireless communication, International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, Vol. 3, Isuue 7, 8P
Archana Singh, Manish Kumar Singh, 2014 - Design and Simulation of Miniaturized Minkowski Fractal Antennas for microwave applications, International Journal of Advanced Research in Computer and Communication Engineering, Vol. 3, Issue 1, 3P
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Software Defined Networks (SDN) is the qualitative movement in the field of networks due to that fact that it separates the control elements from the routing elements, and the function of the routing elements was limited to the implementation of the
decisions that are sent to it by the controller through the OpenFlow Protocol (OF) which is mainly used in SDN. We explain in this paper the benefit of the new concept which is presented by SDN and it makes network management easier, so instead of writing the rules on each device, we program the application in the controller, and the infrastructure devices run the received commands from the controller. In order to achieve the best performance of this technology, a Quality of Service (QoS) must be applied within it, where it includes several criteria, the most important are the used bandwidth, delay, packet loss and jitter. The most important of these criteria is the bandwidth, because by improving this standard, we can improve the rest of the other criteria. Therefore, in this paper, we provide the necessary improvement on the RYUcontroller to use the best bandwidth, which improves the quality of service in SDN.
Modern and future optical networks rely on wavelength divisional multiplexing
technology, it was necessary to developed the whole network elements to keep up with the
increasing need to offer a wide band and a very short time delay and high reliabi
lity, and
replacement of electro optic equipment with optical equipment.
Optical amplifiers have taken an important part in this evolution, and the Raman amplifier
(RAMAN) had a great deal of attention, for its high gain and flattened gain.
In this paper, we have examined the effect of both fiber parameters and pump parameters
on the performance of Raman optical amplifier in terms of gain and bandwidth and the
used pump power.
This research demonstrated the effect of multi pump on this amplifier performance and its
flattening and bandwidth, and we reached a flattening gain on a wide bandwidth.
The simulation was done by using MATLAB and OPTISYSTEM program based on the
mathematical equations that describe the amplifier model for 1450nm-1650nm bandwidth.
The wireless communication devices became very important. They have been fastly
developed fastly in the last few years, so, it was necessary to propose new types Antenna .
A new printed patched Antenna design as, printed, a lenses and wire Antenna,
are
objected to improve the performance, gain and beam width of Antenna.
This work propos a design and simuling of patch fractal Antenna, using Zeland. This
type which depends on fractal geometry (sierpinski carpet) has a very good radiation
pattern and has wide applications.
The proposed Antenna parameters were studied by the help of Zeland simulator, The
variation of the antenna parameters happens when the fractal parameters (as stage of
growth) changes, were analysed.
Finally, the proposed Antenna was praticly applied and measured at the frequency
10Ghz allowed by the microwave and Antenna laboratory.
This research has studied the effect of changing the Lacunarity’s value on the radiation characteristics of square fractal antenna arrays. For the array, which has fractal distribution for its elements on both Y and Z axis, the result indicate that t
he half power beamwidth (HPBW) decrease when the value of Lacunarity increase.
The combination of fractal geometry with antenna array led to increase the freedom degrees of design parameters of this antenna array, by adding the fractal shape's parameters to the regular antenna array's parameters. Which help us to improve some of radiation characteristics of these antennas. One of the most important results of this combination is the advantage of side lobe level (SSL). By the analyzing of the effect of changing the Lacunarity’s value and give different values for another antenna design parameters, the level of side lobe decrease in some models and many lobes appear in another models which can be used as smart antenna models.
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.
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