أبوستة, مرعي2025-03-202025-03-20https://dspace.academy.edu.ly/handle/123456789/1579The rapid development of the wireless contributed to the transforming the existing global telecommunications networks into an integrated system that will provide a broad class of ubiquitous communications services to customers anywhere, anytime, in motion or fixed. Where the antenna is considered to have important roles in the performance and consistency of any device in WLAN communication system because its performance will directly impact the quality of wireless communications. The aim this of work is to investigate different design structures for multi-band microstrip antennas to be used in wireless systems; Including different Slot patch and defected ground plane structures (DGS) techniques. This will add to improve bandwidth and Investigation of different positions and view for the optimizations of various antenna parameters Using These Methodologies Roger RT/ duroid 5880 substrate with dielectric constant 2.2, and ground plane with an area 80mm×90mm has been used for operation at three different bands centered at (2.30-2.7) GHz, (4.0-4.7) GHz and (5.2-5.8) GHz. The Scope of operation is intended to be used for WLAN, IMT (International mobile telecommunications) and WiMAX applicationsThe rapid development of the wireless contributed to the transforming the existing global telecommunications networks into an integrated system that will provide a broad class of ubiquitous communications services to customers anywhere, anytime, in motion or fixed. Where the antenna is considered to have important roles in the performance and consistency of any device in WLAN communication system because its performance will directly impact the quality of wireless communications. The aim this of work is to investigate different design structures for multi-band microstrip antennas to be used in wireless systems; Including different Slot patch and defected ground plane structures (DGS) techniques. This will add to improve bandwidth and Investigation of different positions and view for the optimizations of various antenna parameters Using These Methodologies Roger RT/ duroid 5880 substrate with dielectric constant 2.2, and ground plane with an area 80mm×90mm has been used for operation at three different bands centered at (2.30-2.7) GHz, (4.0-4.7) GHz and (5.2-5.8) GHz. The Scope of operation is intended to be used for WLAN, IMT (International mobile telecommunications) and WiMAX applicationsDesingn and Improvement of Multiband Microstrip Antenna for Wireless APPlication