DESIGN OF RECTANGULAR WAVEGUIDE ARRAYS FOR GENERATING LOW SIDE LOBES

Antenna or Aerial is a transducer which converts one form energy into another form of energy, like that antenna is an electrical device which converts electric power into electromagnetic waves and vice versa. Single antenna element characteristics are not sufficient in wireless communication and radar applications. In view of this array antenna system is preferred in the wireless communication and radar applications. An antenna array is group of antennas connected and arranged in linear &planar structures to form a single antenna that is able to produce radiation patterns not produced by individual antennas. They provide a solution to the problems caused by single antennas. In general, it is required to design an array to produce a pattern with narrow beam width, low side lobes and decaying minor lobes. Antenna array synthesis is a technique which determines input or source distribution for a specified radiation pattern. In this Design of Rectangular Waveguide Arrays for Generating Low side Lobes some standard amplitude distribution techniques are used. Some of those techniques are Uniform Amplitude distribution, Circular Amplitude distribution, Parabolic Amplitude distribution. If minor lobe decays the total energy concentrate only on main lobe and having narrow beam width. The above three amplitude distributions are used to produce required beams and gain for wireless and radar communication.