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Radiating Column of SSR antennas play an important role in final pattern formation. In this paper, a microstrip array antenna with modified cosecant squared pattern is designed to work as radiating column of SSR's antennas in L band. This simple structure consists of a feed network with 11 elements of half-wave printed dipoles as radiating elements. Synthesis pattern method used to obtain required...
The design, simulation and enhancing performance of a new structure for X-band high-power, low-loss, low-bias, triangular-ferrite waveguide circulator is presented. Dual circulation property is obtained by triangular shape of ferrite post. The effects of circulator's structure parameters, such as ferrite parameters and magnetic DC bias, on isolation, insertion loss and return loss of circulator are...
Scattering parameters are the most widely used tools for characterization of the linear microwave circuits. Although they can be physically measured after the implementation of the microwave circuits, accurate calculation of these parameters plays a crucial role in the design process. By using a time domain technique such as finite difference time domain, it is possible to calculate the scattering...
Probabilistic perceptions are the most proper tools for building mobile robotics mapping especially if no accurate model of the sensory system and the environmental features are in hand. Here, we briefly introduce architecture of our Demining robot (DR) and then deeply investigate the scanning and mapping method it employs in order to gather the knowledge from the working environment, communicate...
The rapid calculation of the far-field radiation fields of a reflector antenna by optimum meshing size is reported. The reflector can be the intersection of a cone with any surface of revolution or an offset sector of any surface of revolution. The feed is assumed to be linearly polarized and located in a desired place in front of the reflector. The reflector is analyzed by Geometrical Optics (GO)...
Fractal geometry has been developed within the last quarter century for understanding geometries that cannot be easily defined by Euclidian geometry. Fractal geometry encompasses an iterative methodology for defining structures. A simple geometrical transformation is performed on a starting structure and the result is fed back into this same transformation many times.
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