الفهرس 
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Abstract
Finite Difference Time Domain (FDTD) is a popular computational
technique used in the field of electromagnetics to simulate and analyze the behavior of electromagnetic waves in various environments.
It is widely used in the design of communication systems, photonic
devices, antennas, sensors etc. in this thesis we present two different designs of antenna applications based on FDTD Method using a computer-based simulator CST. The first design is an ultradirective microstrip Yagi design (frequency = 2.4 GHz) used in Wireless Communications while the second design is a novel compact-size
microstrip antenna (frequency = 6.6 GHz) proposed as microwave
imaging to diagnose breast cancer. The design of those antennas on
PC simulators takes long time to get the optimum device structure.
where a huge number of iterative simulations are required because
FDTD method is computationally intensive and requires a significant
amount of processing power, especially for large-scale problems. This
can make the simulation process time-consuming and limit the scope
of applications that can be modeled using FDTD. So also, we proposed in this thesis a design of FPGA-based (FDTD) simulator to
accelerate the simulation process. The proposed technique is tested
using the analysis of two-dimensional horn antenna and photonic
crystal bend structure. The computational speed of FPGA-based
hardware design is about 130 times faster than a software implementation on a 3GHz PC.