Mohamed M. Elsewe

Modal analysis of patch slot designs in microstrip patch antennas

The Theory of Characteristic Modes is proposed as a systematic approach to antenna design to achieve the goal of finding the antenna structure with optimum broadband behavior. This theory provides a physical insight to the radiating nature of microstrip patch antennas and reduces the design optimization time. In this paper, the resonant behavior of different patch slot designs are analyzed using this theory. The modal analysis concludes that the U-slot patch design is the highest radiating structure and hence is a good candidate to achieve the highest impedance bandwidth.

Characteristic mode analysis of microstrip patch shapes

The Theory of Characteristic Modes provides physical insight to the radiating nature of microstrip patch antennas and hence reduces the design optimization time. In this research, the resonant behavior of different patch shapes are analyzed using this theory. The modal analysis concludes that the parallelogram and elliptical patch shapes are more resonant than other patch shapes with the same surface area and hence are good candidates for realizing ultra-wideband microstrip patch antennas.

Characteristic mode analysis of ground plane size in microstrip patch antennas

The Theory of Characteristic Modes is proposed as a systematic approach to antenna design to achieve the goal of finding the antenna structure with optimum broadband behavior. This theory provides a physical insight to the radiating nature of microstrip patch antennas and reduces the design optimization time. In this paper, the resonant behavior of different ground plane sizes are analyzed using this theory. The modal analysis concludes that the larger the ground plane the more resonant the antenna structure is. Hence, microstrip patch antennas with larger ground plane are a good candidate to achieve the highest impedance bandwidth.

Characteristic mode analysis of excitation feed probes in microstrip patch antennas

The Theory of Characteristic Modes is proposed as a systematic approach to antenna design to achieve the goal of finding the antenna structure with optimum broadband behavior. This theory provides a physical insight to the radiating nature of microstrip patch antennas and reduces the design optimization time. In this paper, the resonant behavior of different excitation feed probes are analyzed using this theory. The modal analysis concludes that a T-probe feed structure is more resonant and would be a good candidate to achieve the highest impedance bandwidth.

Modal analysis of substrate permittivities in microstrip patch antennas

The Theory of Characteristic Modes is proposed as a systematic approach to antenna design to achieve the goal of finding the antenna structure with optimum broadband behavior. This theory provides a physical insight to the radiating nature of microstrip patch antennas and reduces the design optimization time. In this paper, the resonant behavior of different substrate permittivities are analyzed using this theory. The modal analysis concludes that εr = 4.4 substrate is the most resonant dielectric and hence is a good candidate to achieve the highest impedance bandwidth.

Analysis of nonuniform excitation and element spacing in sidelobe reduction of wideband U-slot microstrip patch phased array antennas

The sidelobe reduction of a 17-element L-probe-fed U-slot microstrip linear phased array is effected. Results indicate that using nonuniform excitation and inter-element spacing can reduce the sidelobe levels by over -10dB when compared to nonuniform excitation only and by over -7dB when compared with nonuniform inter-element spacing only. This is mainly observed as the array is scanned 60° away from broadside.

Scan behavior of U-slot microstrip patch phased array antennas

Ultra-wideband (UWB) phased arrays are increasingly used in radar and medical applications. The scan behavior of 5×5 planar phased arrays using different patch orientations and U-slot topologies is examined for εr = 2.2 substrate. Results indicate that, in addition to low mutual coupling, symmetrical patch orientations, U-slot topologies and feed lines should be sought in the design of U-slot microstrip patch phased array antennas to achieve good scan performance with low cross-polarization.