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In this paper, we implement hybrid Woodward-Lawson Neural Networks and weighted Fourier method to synthesize antenna arrays. The neural networks (NN) is applied here to simplify the modeling of MIMO antenna arrays by assessing phases. The main problem is obviously to find optimal weights of the linear antenna array elements giving radiation pattern with minimum sidelobe level (SLL) and hence ameliorating...
In this paper, we study an electromagnetic optimization technique using Taguchi's method and apply it to circular antenna array (CAA) design. Taguchi's method was developed on the basis of the orthogonal array (OA) concept, which offers systematic and efficient characteristics. The newly proposed idea is the implementation of Taguchi optimization method for CAA of order 10, 16 and 24 respectively...
In this paper, we study an electromagnetic optimization technique using Taguchi's method and apply it to concentric ring antenna array design. Taguchi's method was developped on the basis of the orthogonal array (OA) concept, which offers systematic and efficient characteristics. The newly proposed idea is the implementation of Taguchi optimization method for Concentric Circular Antenna Array (CCAA)...
In this paper, we are proposing a new formal framework for reasoning on authentication in security protocols based on analytic functions. We give sufficient conditions that, if satisfied, the protocol is declared correct with respect to authentication. We validate our approach on the Yahalom-Lowe protocol. First, we show that it satisfies these few conditions, thus, we conclude that it is correct...
Phase shifters present the key components in the field of phased array antenna. They are used to electrically shape and steer the antenna beam. In this paper, the design and simulation of S-band 6-bits phase shifter based on semiconductor switch is suggested. The proposal is designed by combining the properties of reflection and switched lines and it consists of two stages. The first stage is realized...
Multiple-input multiple-output (MIMO) systems are commonly used in wireless communications to ensure high bit-rate and high capacity transmission. Space time block coding (STBC) is a technique used in MIMO to provide transmit diversity in communication over fading channels. Although STBC has full diversity gain, the coding gain need to be improved by using channel coding such as low density parity...
This paper presents a compact coplanar waveguide(CPW) fed planar slot antenna. The antenna consists of a rectangular tuning stub. The band notching of WiMAX (5.5–5.65 GHz) is achieved by inserting a ‘U’ slot. The size of the antenna is around 28mm (L) × 21mm (W) × 0.16 mm (T). The prototype of the proposed antenna is simulated for its optimal values and tested. This paper combined also the Taguchi...
The objective of this paper is to present a beam synthesis technique for circular antenna array antennas with efficient tapering. This paper describes a Taguchi to synthesize circular antenna arrays controlled by the phase and amplitude excitation, to synthesize directive lobe. The advantage of Taguchi's optimization technique is the ability of solving problems with a high degree of complexity using...
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