In this paper, a new design of Ultra Wide Band (UWB) antenna is proposed. The antenna parameters in frequency domain analysis have been investigated to show its capability as an effective radiating element. The voltage standing wave ratio is less than 2 (VSWR< 2) and return loss ( ) is less than -10 dB along the operation bandwidth of 4 GHz to 17 GHz. The simulated return loss, VSWR,input impedance and radiation pattern are presented in this paper.
The antenna is very useful for impulse and UWB communication systems (in radar communication, for military application (defense department), bio-medical technology, space communication through satellite) and as proposed antenna has end fire radiation pattern it is very useful in point to point communication with very high gain performance.
Keywords-Ultra wideband (UWB), triangular sheet, Voltage standing wave ratio (VSWR), Return loss ( ).
The paper presents the application of the hybrid neuro-fuzzy model for the analysis and synthesis of a square multiband Sierpinski carpet fractal antenna. For the analysis model, the antenna geometrical parameters were taken as the input, and the resonant frequencies were obtained as the output while for the synthesis model, the resonant frequencies were taken as the input, and geometrical parameters were obtained as the output. Also, a model was trained to obtain the return loss characteristics for the given set of geometrical parameters. The developed model was validated by comparing the resonant frequencies and radiation pattern of the simulated and fabricated antennas.
The paper presents a new UWB antenna named as Slotted Vertical Semi Elliptical Sheet Antenna. The simulated return loss, VSWR, input impedance and radiation pattern are discussed in this paper. The results show that the voltage standing wave ratio is less than 2 (VSWR< 2) and return loss ( ) is less than -10 dB along the operation bandwidth of 4.1 GHz to 12.5 GHz. The asymmetry in the feed position results in increase of the band width but degrades the radiation pattern. However, the radiation pattern can be made directional using an appropriate reflector. The simulated radiation patterns after adding a reflector have also been discussed in the paper.Keywords-Ultra wideband (UWB), Vertical semi elliptical sheet, Voltage standing wave ratio (VSWR), Return loss ( ).
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