Array pattern synthesis

This paper proposes an efficient beamformer based on the binary bat algorithm for uniform rectangular arrays of half-wavelength dipoles. The proposed beamformer utilizes the technique of controlling only the amplitude of excitation weights to produce optimal patterns with minimal distortions in sidelobe regions while maintaining the main beam and imposing nulls in the directions of interfering signals.

5p vifalcon 18-05-2023 8 4   Download

To achieve effective power delivery in space, this paper proposes an efficient beamformer that can focus energy on the direction of the desired people and minimize energy in the direction of undesired people (interferences).

6p vifalcon 16-05-2023 3 2   Download

In this paper, a feeding network based on Bat algorithm for pattern-nulling of a linear antenna array will be proposed. Bat algorithm has been used for calculating the amplitude of input weights for a uniform linear antenna array (ULA array) to place a wide null at a pre-defined position. A new feeding network structure to implement the excitation weights for a 12x1 ULA array will be proposed, designed and simulated.

4p wangziyi_1307 26-04-2022 12 1   Download

In this paper, we propose an adaptive beamformer based on a binary bat algorithm (BBA) for pattern nulling of uniformly linear array (ULA) antennas. The optimized array pattern is obtained by controlling the phase of each array excitation weight.

6p viericschmid 12-01-2022 19 2   Download

Nanotechnology has experienced a rapid growth in the past decade, mostly because of the rapid advances in nano-fabrication techniques employed to fabricate the nanodevices. Nano-fabrication can be divided into two categories: the first is the so-called “bottom up” approach, in which nano-structures are created either by chemical synthesis of nano-wires, nanotubes and nano-particles, or by self-assembly of nano-objects or thin layers to form quasi-periodic arrays or phase separation patterns....

362p bi_bi1 10-07-2012 92 17   Download

Many aircraft radars are now equipped with flat plane slot arrays instead of dish antennas, where the outline is approximately circular. These are usually fixed narrow-beam antennas with controlled sidelobes. Pattern synthesis typically usesthe product of two linear syntheses;one along the slot “sticks,” and a second across the sticks. These are often designed as Taylor ii patterns, as described in Chapter 3. Since the sticks near the edge are shorter, with fewer slots, than those at the center, the overall pattern will deviate somewhat from the product of the two orthogonal patterns...

21p huggoo 23-08-2010 87 12   Download

Linear Array Pattern Synthesis The fields radiated from a linear array are a superposition (sum) of the fields radiated by each element in the presence of the other elements. Each element has an excitation parameter, which is current for a dipole, voltage for a slot

59p huggoo 23-08-2010 100 17   Download