In this work a new approach to synthesize sum and difference pattern in the radiation pattern of linear antenna arrays is proposed. To reduce the design cost of the feed network of the array for the desired array pattern, only part of the radiating elements are excited non-uniformly whereas the remaining elements are excited uniformly at constant amplitude. The work is illustrated with a 30 ele...

In this work, the method of iterative Fourier transform phase reconstruction, conventionally used in holography and optical image reconstruction, is applied to phase only synthesis of antenna patterns. The method is applied to two types of pattern synthesis problems: "main lobe beam shaping" and "side-lobe-level reduction". The proposed method is most useful in the efficient employment of attai...

The development of a feedback control sensor for flame‐based infrared (IR) heaters used in animal agriculture is described. The intended use of this sensor is to control the heating pattern at desired levels for young animals in enclosed housing applications to desired micro‐climate specifications. The sensor developed was sensitive to placement position in the IR heat pattern but once a suitab...

An efficient method based on the hybrid model with breeding and subpopulations, between genetic algorithm and a modified particle swarm optimizer for the linear antenna arrays pattern synthesis with prescribed nulls in the interference direction and multi-lobe beam forming by the complex weights of each array element is presented. In general, the pattern synthesis technique that generates a des...

The paper considers the maximum facilitation of rock breaking at a predetermined optimum pattern placement weapons and completeness saturation by cutter teeth. conditions for increasing productivity newly established drill bit obtaining desired effect in kinetic interpretation are given.

This paper deals with the possibilities of cancellation of unwanted signals by steering nulls of the pattern in the direction of arrival of signal while keeping the main beam to the desired direction. New iterative adaptive digital beam forming technique is presented here to enhance the conventional effectiveness of beam forming in common commercial application. Simulation and measurement resul...