nan Kamakshi

Analysis of Microstrip Line Feed Slot Loaded Patch Antenna Using Artificial Neural Network

In this article, the parametric analysis of the slot-loaded microstrip line feed patch antenna is investigated using artiflcial neural network model. The bandwidths of the proposed antenna obtained at TM01, TM02, and TM03 frequency modes are 10.2GHz, 13.6GHz, and 17.2GHz, respectively. The performance of the proposed antenna is analyzed using artiflcial neural network model. The changes obtained in bandwidth due to the position of slot length and slot width are reported. The antenna parameters such as return loss, VSWR, gain and e-ciency are also calculated. The simulated results obtained with the help of IE3D simulation software are trained and tested using ANN. Theoretical results are compared with simulated and experimental ones, and they are in close agreement. Microstrip antennas have sparked interest among researchers because of their attractive features like low proflle, light weight, and conformal to mounting structures, but they have two most serious limitations, narrow bandwidth and low gain (1). Available methods for the analysis of MSA have high level of complexity. Generally, there are two methods for analysis of microstrip antenna such as numerical method and analytical method. The numerical methods is complicated compared to analytical methods and require much more time, whereas, analytical methods are easy and specifled to only some deflnite shapes of microstrip antenna. An artiflcial neural network (ANN) is used here for reducing some of these problems. ANNs are computational tools that learn from experience (training), which provide fast and accurate models for microwave modeling, simulation, and optimization. Using artiflcial neural network microstrip patch antenna was reported by Vegni and Toscano (2) in which they proposed the analysis of MSA using artiflcial neural network. Further, Mishra and Patnaik (3,4) proposed a CAD model for the design of square patch antenna and artiflcial model for efiective dielectric constant of microstrip line. Later, CAD model using spectral domain formulation (5) was also reported for the designing of rectangular patch antenna. Therefore, Guney and Sarikaya (6) proposed a comparative study of MAMDANI and Sugeno fuzzy interface system models for the resonant frequency calculation of rectangular microstrip patch antenna. Several other papers have also used ANN model to analyze and synthesize the microwave circuits (7{15). Thakare and Singhal (16) proposed the analysis of broadband slot-loaded inset feed microstrip patch antenna using ANN model. Most of these papers are based on ANN model presented only simulated and experimental results. In this paper, we provide a theoretical investigation and compare its results with simulated and experimental ones. In this paper, the microstrip line feed slot-loaded patch antenna is proposed. Its theoretical, simulated and ANN results have also been verifled experimentally. The proposed antenna is investigated for triple frequency-band operation, so that single antenna can be utilized for more than one frequency bands. The theoretical analysis of the proposed antenna is discussed using circuit theory concept based on modal expansion cavity model whereas ANN used RBFNN model.

RBF Neural Network Modeling of Rectangular Microstrip Patch Antenna

In this paper, a design procedure has been proposed for rectangular micro strip patch antenna using artificial neural network, which has been demonstrated using radial basis function neural network. The Neural model was analyzed for 20 sets of input output parameters. The radial basis function outputs are optimized by variation of spread constant and number of neurons. By applying this model we can reduce output error as well as time delay of system. The testing of output of neural model is found in good agreement with theoretical values.

INVESTIGATIONS FOR PERFORMANCE IMPROVEMENT OF X-SHAPED RMSA USING ARTIFICIAL NEURAL NETWORK BY PREDICTING SLOT SIZE

In this paper, an application of artiflcial neural network based on multilayer perceptron (MLP) model is presented for predicting the slot size on the radiating patch for improvement of the performance of patch antenna. Several performance afiecting parameters like resonance frequencies, gain, directivity, antenna e-ciency, and radiation e-ciency for dual band frequency are observed with the variation of slot size. For validation of this work, a prototype X-shaped patch antenna is fabricated using glass epoxy substrate and its performance parameters are measured experimentally and have been found in good agreement with ANN and simulated values.

Design and Analysis of Microstrip Line Feed Toppled T Shaped Microstrip Patch Antenna using Radial Basis Function Neural Network

This paper deals with the design of a microstrip line feed toppled T shaped microstrip patch antenna that gives dualband characteristics at 4 GHz and 6.73 GHz respectively. The simulation of proposed antenna geometry has been performed using method of moment based IE3D simulation software. A radial basis function neural network (RBFNN) is used for the estimation of bandwidth for dualband at 4 GHz and 6.73 GHz respectively. In RBFNN model, antenna parameters such as dielectric constant, height of substrate, and width are used as input and bandwidth of first and second band is considered as output of the network. To validate the RBFNN output, an antenna has been physically fabricated on glass epoxy substrate. The fabricated antenna can be utilized in S and C bands applications. RBFNN results are found in close agreement with simulated and experimental results.

Analysis of L-strip fed gap coupled compact semi-circular disk patch antenna

In this paper, a dual frequency resonance antenna is achieved by L-strip fed semi-circular disk patch antenna with parasitic elements. It is analyzed by using circuit theory concept in which theoretical results are compared with IE3D simulation. It is found that, the bandwidth of lower and upper resonance frequency of simulated result are 6.61% and 6.02 %, whereas for theoretical result are 10.64 % and 9.06 % respectively.

Broadband rectangular microstrip antenna loaded with a pair of U-shaped slot

In this paper analysis of double U-slot loaded patch antenna is presented. The parameter of the antenna significantly depends on slot dimensions. Bandwidth of the proposed antenna is found 21.59 %. The 3dB beamwidth of the antenna is found to be 90° for the central frequency of 1.9 GHz. The theoretical results obtained from the analysis are compared with IE3D simulated and experimental results which are in good agreement.

Analysis of pair of L-shaped slot loaded patch antenna for WLAN application

A pair of L-shaped slot loaded rectangular patch antenna is analysed by using circuit theory concept which exhibits dual resonance behaviour. Two resonance frequencies are at 2.45 GHz and 5.125 GHz (experimental 2.44GHz and 5.12GHz, simulated 2.48 GHz and 5.2 GHz). The −10 dB bandwidth of lower and upper resonance frequency is 4.13 % (experimental 3.4 %, simulated 3.51 %) and 8.82 % (experimental 8.79 %, simulated 8.78 %) respectively. The frequency ratio of the antenna for a given dimension of L-slot is found to be 2.092 (experimental 2.098, simulated 2.097). The theoretical results are compared with the simulated results obtained from IE3D which are in close agreement.

Inset fed rectangular microstrip patch antenna with parasitic Element

In this paper, a dual frequency resonance antenna is achieved by inset fed rectangular microstrip patch antenna with parasitic Element. It is analyzed by using circuit theory concept in which theoretical result is compared with IE3D simulation. It is found that, the bandwidth of lower and upper resonance frequency of simulated result are 1.01% and 2.42 %, whereas for theoretical result are 1.83 % and 3.43 % respectively.

Analysis of L-strip feed slot loaded dual band microstrip patch antenna

A dual band L-strip proximity fed slot loaded rectangular microstrip patch antenna is proposed and investigated theoretically as well as simulated by IE3D. Numerical results for the input impedance, VSWR and return loss are presented and compared with simulated results. The effect on varying height h2, slot width and width of the strip are analyzed to obtained the optimum values for dual band operation. The resonance frequency of proposed antenna is found to be 3.26GHz and 6.20 GHz for lower and upper resonance frequency. The frequency ratio is found to be 1.95. The bandwidth of the proposed antenna is found to be 1.63% and 1.18 % (simulated) and 3.35 % and 2.5 % (theoretical) for lower and upper resonance frequency respectively.

Analysis of slots and notches loaded patch antenna for dualband operation

In this article, the theoretical analysis is carried out of the slots and notches loaded microstrip patch antenna for dual-band operations. It is observed that antenna resonates at three distinct modes of frequencies. The bandwidth of the proposed antenna at TM01 is 3.42%, TM02 is 3.81% and TM03 is 4.80%. The theoretical results of proposed antenna are compared with IE3D simulation results.