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Register a new userDesign of multiband antenna support 4G applications
تصميم هوائي متعدد المجالات يدعم تطبيقات الجيل الرابع
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تم في هذا البحث تصميم الهوائي اللوغاريتمي الدوري المطبوع (LPDA (Log PeriodicPrinted Antenna بحيث يعمل على مجالات ترددية متعددة ضمن المجال (0.5 – 12) GHz و يتمتع بأبعاد صغيرة مناسبة للتطبيقات المحمولة.
This article proposes a possible improvement for a printed logperiodic dipole antenna (LPDA). The improvements makes the antenna capable to operate over a multi frequency bands between (0.5 – 12) GHz. This antenna has a small dimension suitable for any mobile application.
References used
IEEE Standard Test Procedures for Antennas, IEEE Std 149-1979, Published by IEEE, Inc., 1979, Distributed by Wiley-Interscience
Balanis C. A., 2005. "Antenna Theory Analysis and Design", United States: Jhon Wiley & Sons
J. S. Hollis, T. J. Lyon, and L. Clayton, Jr."Microwave Antenna Measurements", ScientificAtlanta, Inc., Atlanta, GA, July 1970
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.In this paper we present a new method to improve microstrip
patch antenna bandwidth to support 5Generatiton and previous
generations frequency bands ,at our proposed method multi slots
have been made in microstrip patch antenna to get the
maximu
m current distribution on the surface & get desired
improvements.
This paper illustrates a design of linear array antenna equal space and non uniform
excitation using Dolph – Chebyshev method , We will discuss the designing procedure
for antenna array having odd or even number of elements at two different values
of the
major to minor sidelobe level and at various between spaces , we will calculate the
excitation coefficients and plot the radiation pattern for each case in addition to calculate
both of the half power beam width angel and directivity. Finally : two curves will be
plotted : first of them for beam broadening factor as a function of the major to minor
sidelobe ratio ,the other one for directivity as a function of the array length.
this paper illustrates two methods of having a desired sectoral pattern using the
techniques of antenna synthesizing ,we will calculate the array excitation coefficients by
using Fourier transform and Woodward method , beside studying the effect of
increasing
the array elements on the desired radiation pattern and the side loop level at a constant
distance. Finally we will compare the results of the two methods showing their advantages
and disadvantages.
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 present a novel reconfigurable patch antenna
to support 5G and previous generations frequency bands ,at this
proposed method multi slots have been made in microstrip patch
antenna and three PIN diode at ground The Reconfigurability i
s
done by changing the status (ON - OFF) of the PIN diode on ground
substrate to get butter current distribution on the surface which
led to multiple BW .
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