Neural network analysis of switchability of microstrip rectangular patch antenna printed on ferrite material

Abstract

A switchable microstrip rectangular patch antenna printed on ferrite substrate in the X-band is presented using general artificial neural network (ANN) analysis. The ferrite substrate offers a number of unique radiation characteristics including switchable and polarized radiations from a microstrip antenna with DC magnetic biasing. In such a case, for particular frequency most of the power is converted into magnetostatic waves and little radiates into air. Subsequently, the antenna behaves as switch off, in the sense that it effectively absent as radiator. Both synthesis and analysis are mainly focused on the switchability of antenna. In this work, radial basis function (RBF) networks are used in ANN models. Synthesis is defined as the forward side and then analysis as the reverse side of the problem. Here, the analysis is considered as a final stage of the design procedure, therefore, the parameters of the analysis ANN network are determined by the data obtained reversing the input-output data of the synthesis network. In the RBF network, the spread value was chosen as 0.01, which gives the best accuracy. RBF is tested with 100 sample frequencies but trained only for particular cutoff 15 sample frequencies.

Modeling of microstrip antennas using neural networks techniques: A review

“…A neural model is more appreciated if it is created for computing several performance parameters, simultaneously. In microwave domain, the concept of creating a generalized neural network (GNN) model has recently gained very much popularity . Turker et al have used GNN model for simultaneous analysis and synthesis of RMAs.…”

“…Malathi and Kumar have proposed a GNN model for both analysis and synthesis of CMAs. A switchable MSA, printed on ferrite substrate, has been analyzed and synthesized by Saxena et al . Thus, on summarizing the literature, it is observed that the models from Refs.…”

“… are based on equivalent patch area concept, whereas the models from Refs. are based on making switching between forward‐ and reverse‐side. Thus, use of these two concepts becomes sometimes undesirable and time consuming when instant answer is required.…”

Analytical calculation for input impedance of a circularly‐polarized ferrite disk antenna including higher order modes

“…1 Microstrip patch antennas are the most popular structures for realizing CPA's. Microstrip patch CPA (MP-CPA) can be designed as a single feed [2][3][4][5][6][7][8][9] and dual (multiple) feed types. [10][11][12][13] Ferrite-based CPA's [14][15][16][17][18][19] provide a number of attractive features like beam scanning, 20,21 low radar crosssection scattering, 22,23 frequency tunability 24 and possible surface-wave reduction.…”

Application of Genetic Algorithm for Optimization of Important Parameters of Magnetically Biased Microstrip Circular Patch Antenna

“…Present analysis also incorporate the dispersion effects due to magnetic field biasing in the form of effective propagation constant (k) which is not discussed in the referenced articles. Some similar referenced works [7][8][9][10][11] also have done mathematically or by conventional methods for optimization but this technique is rather precise, accurate and sensitive to optimize parameters of patch antenna as well as other type of antenna also.…”