Vivek Singh Kushwah

Size Reduction of Microstrip Patch Antenna Using Defected Microstrip Structures

Use of discontinuities in ground planes or in micro strip lines is currently employed to improve the performance of different passive circuits. It includes size reduction of amplifiers, enhancement of filter characteristics and applications to suppress harmonics in patch antennas. This paper presents an improved method of size reduction of a micro strip antenna using Defected Micro strip Structure. It does so by introducing imperfections in the micro strip antenna on the conducting layer using a DMS designed defect. The design was simulated using IE3D Electromagnetic Simulator. The results are very encouraging as it increases the number of components in a given constant area. On the other hand, a new proposal, called defected micro strip structure (DMS), has been successfully used in reducing the size of, and can be further used as tuning technique for, rectangular patch antennas.

Design of Microstrip Patch Antennas Using Neural Network

This paper presents the general design of microstrip antennas using artificial neural networks for rectangular patch geometry. The design consists of synthesis in the forward side and then analyzed as the reverse side of the problem. In this work, the neural network is employed as a tool in design of microstrip antennas. The Neural network Training algorithms are used in simulation of results for training the samples to minimize the error and to obtain the geometric dimensions with high accuracy for selective band of frequencies.

Artificial neural network design of stub microstrip band-pass filters

In this paper, an artificial neural network (ANN) design technique for a stub microstrip band-pass filter is presented. Essential dimensions of the microstrip filter layout are used to get the relationship of the input-outputs for ANN model. This paper presents the design and analysis of stub microstrip band-pass filter at mid-band frequency 1.8 GHz, which produced improved bandwidth and minimum insertion loss of –0.5899 dB and return loss of –36.67 dB. Artificial neural network architecture has been proposed to determine the magnitude variation of scattering parameters (S-parameters) of the microstrip band-pass filters for various dimensions. The ANN model produced has been exposed to be as exact and veracious as an EM simulator and it is computationally more effective in the design. The simulation is performed using the commercial software IE3D 14.1 and ANN training of S-parameters are performed in MATLAB 7.1.

Designing Stepped Impedance Microstrip Low-Pass Filters Using Artificial Neural Network at 1.8 GHz

In this paper a design technique for a Stepped impedance Micro strip Low-pass filters is presented by using the artificial neural network (ANN) modeling method. Required dimensions of the micro strip filter layout are used to get the input-output relationships in the ANN model. This paper presents the design and analysis of Stepped impedance Micro strip Low-pass filters at cut-off frequency 1.8 GHz which gives insertion loss (S21) of-3 dB at cut-off point. Subsequently an artificial neural network model is developed to find out the Magnitude variation of scattering parameters (S-parameters) of Micro strip Low-pass filters at 1.8 GHz for different dimensions. After developing the ANN model of micro strip low-pass filter, it is computationally more efficient in the design and it has been displayed to be as accurate as an Electromagnetic simulator. The simulation is performed using the commercial software IE3D 14.1 and MATLAB programming language GUI Tools are used for ANN Training.

Tag antenna analysis for RFID

To maintain high performance in communication systems, it is required have optimal design and analysis of antenna for RFID tags at UHF and Microwave Frequency. In this approach paper the main focus is on the specific characteristics of RFID for advanced applications in current development of RFID antenna. To reduce size of antenna meander line structure of antenna is adopted. The antenna modeling and system simulation of an RFID communication has been investigated in this paper. The basic need in RFID is to miniaturize the size of tag, which contains the antenna and an integrated circuit. In this paper we have paid a large attention to reduce the size of an antenna by using meander line structures.

Design of Microstrip Patch Antenna Using Defected Microstrip Structure

In this paper, the design of compact size Micro strip patch antenna is presented at resonant frequency 2 GHz using defected micro strip structure which has various wireless communication applications. The antenna is constructed using micro strip feed line technique and fabricated using dielectric FR4 substrate which has dimensions of (35.4 mm×45.6 mm). The frequency response gives a very sharp cut off at 2 GHz with return loss of-31.27dB. The simulation is performed using the commercial Electromagnetic simulation software IE3D 14.1.

Design of Microstrip Low Pass Filter with Defected Ground Structure

In this paper, a micro strip low pass filter has been designed having circular shaped defects on ground structure (DGS). For obtaining the proposed defected ground structure, two circular shaped defected ground structure are connected by slot in the ground plane and three such defects are used for obtaining the design. The cut-off frequency of the designed filter is 1.6 GHz which is useful for the purpose of L-Band cellular communication. The highest insertion loss of the proposed filter is 31 dB and maximum return loss of 79 dB is obtained. IE3D 14.1 simulation software is used for obtaining the result.

INVESTIGATION ON CIRCULARLY POLARIZED RING DIELECTRIC RESONATOR ANTENNA FOR DUAL-BAND WIRELESS APPLICATIONS

In this article, design and analysis of a dual-band ring dielectric resonator based radiator with circular polarization features is explored. The presented ring DRA is excited with the help of a tilted modified square-shaped aperture. Two important attractive features of the present article are: (i) two radiating modes originated inside the ring DRA, i.e., HEM11δ and HEM12δ mode; (ii) tilted modified square aperture generates circular polarized (CP) wave in both the operating frequency bands. For verifying the simulated results, practical model of the proposed antenna has been fabricated and verified. Experimental outcomes display that the proposed radiator functions over dual frequency bands, i.e., 2.8–3.58 GHz and 5.5–5.92 GHz respectively. 3-dB axial ratio (AR) frequency ranges of the proposed radiator are 2.8–3.2 GHz and 5.85–6.0 GHz, respectively. These appearances make it appropriate for some important wireless applications such as wireless LAN (2.4/5.2 GHz) and WiMAX (2.5 GHz) applications.

Design of Grooved Microstrip Band Pass Filter at 4.2 GHz

In advanced communication systems, the filters play an important role in terms of selectivity and rejection of the unwanted signals. In microwave frequency applications the design of filter is difficult as lumped components cannot be used in this range of frequency. Microstrip filters are always chosen over the lumped filters at greater frequency for their higher performance, smaller size, lighter weight and lower cost. In this paper design of parallel grooved band-pass resonator filter has been presented at mid-band frequency 4.25 GHz, which is new concept in filter design. This filter has high attenuation in stop band, return loss of 35.16 dB and small insertion loss of 1.102 dB in the pass band.

Designing of Open Stub Low Pass Filter for 1.4 GHz

This paper presents the design and analysis of folded open stub impedance Micro strip Low-pass filters at cutoff frequency 1.4 GHz which gives insertion loss (S21) of -3. 413 dB and return loss of-2.571 dB at cut-off point. Design with making by the micro strip technology, it becomes more practical and widely used in modern Microwave circuits. This filter has less complexity and more compact size rather than other filters. Simulation is performed with the help of IE3D 14.1 Electromagnetic simulator, based on method of moments and results have been fairly good.