High gain antennas have many applications in wireless communication systems as they produce focused and narrow beamwidth, which allow for more precise targeting of the signal. Therefore, various gain enhancement techniques for antennas have been studied in the past decades [1–21]. Specifically there are three important methods to achieve this purpose: (1) Using antenna array, (2) Adding superst...

The need for directional antennas possessing high gain, wideband and circular polarization characteristics for different wireless applications has increased considerably. In this research paper, a slotted coaxial line fed cavity backed U-shaped cross dipole antenna is developed to achieve wide bandwidth and reconfigurable circular polarization. The cross dipole consists of two orthogonal U-shap...

This paper demonstrates a novel kind of cavity-backed self-quadplexing slot antenna for the S and C-band applications. The proposed consists 4 distinct “U”-shaped slots different lengths produces quad frequency band wireless communication systems. These are excited through separate orthogonal placed microstrip feed lines 50 Ω; generates four operating bands at 3.2 GHz, 4.1 5.8 7.2 GHz. Due to p...

In this paper a particle swarm optimization (PSO) algorithm is presented to design a compact stepped triangle shape antenna in order to obtain the proper UWB bandwidth as defined by FCC. By changing the various cavity dimensions of the antenna, data to develop PSO program in MATLAB is achieved. The results obtained from the PSO algorithm are applied to the antenna design to fine-tune the bandwi...