الفهرس 
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Abstract
Millimeter wave (Mm-Wave) communication systems have attracted
significant interest regarding meeting the capacity requirements of the
future 5G network. The Mm-Wave systems have frequency ranges in
between 30 and 300 GHz. Although the available bandwidth of Mm-Wave
frequencies is promising, the propagation characteristics are significantly
different from microwave frequency bands in terms of path loss, diffraction
and blockage, rain attenuation, atmospheric absorption, and foliage loss
behaviors. In general, the overall loss of Mm-Wave systems is significantly
larger than that of microwave systems for a point-to-point link. Fortunately,
however, the small wavelengths of Mm-Wave frequencies enable large
numbers of antenna elements to be deployed in the same form factor
thereby providing high gains.
The main objective for the thesis is designing four antennas operating at the
Mm-Wave range.
This thesis is organized as follow: Simulation and fabrication the four
prototypes:
The first two model are log periodic dipole array antennas (LPDA), one of
which cover a frequency range between 26 GHz to 44 GHz implemented
on RT5880 as a dielectric medium and a thickness of 0.508 mm utilized for
5G applications, and the second prototype is also LPDA antenna which has
a super wide range between 40 GHz and 70 GHz fabricated on RT5880 as
a dielectric medium and a thickness of 0.254 mm utilized for V-band
applications like, wireless personal area network (WPAN) supported by
IEEE 802.11ad and IEEE 802.15.3c. The two models have little
dimensions, stable radiation characteristics, high realized gain, side lobe suppressions.
The third model is an antipodal Vivaldi antenna (AVA), which is designed
and implemented on FR-4 substrate with a dielectric thickness of 1.5mm
which includes a wide range from 58GHz to 62 GHz. Moreover, the
antenna accomplishes high gain, a stable radiation pattern and a
miniaturized size to be convenient for short-range communications and
millimeter wave imaging.
The fourth prototype is a coplanar waveguide antenna (CPW) which
simulated on a lossy metallic silver glass substrate with a conductivity of
4.41084 + e07 s/m and a metal thickness of 1.1 mm. This antenna operates
at a bandwidth extend from 50 GHz to 70 GHz and is utilized for WiGig
applications known as Wi-Fi 60 GHz.
Finally, The simulated and fabricated results are agree well and achieved
better results compared to the literature work.