Rahul Kumar Verma

Design and fabrication of window shaped fractal antenna for RFID

This paper describes the window shaped fractal antenna and uses it as application in RFID by reducing the size of an antenna along the use of fractals technique. The proposed antenna possess the properties of miniaturizations by 15.1% in second iteration of window shaped based antenna. The FR4_epoxy uses as the substrate with height of 1.6mm. The proposed antenna has been fabricated and tested on analyzer, the outcome result comparison with simulated result, have found the similar characteristics. The return Loss (S11) <; -10dB of the proposed antenna at second iteration found frequencies of 2.25 GHz, 3.5GHz and 5.3GHz.

Investigation of the effect of substrate material on the performance of microstrip antenna

In designing of microstrip antenna the suitable substrate is an important. The substrate properties such as its dielectric constant, loss tangent have a good effect on the antenna characteristics. In this paper a detailed study of the effect of various substrate material on the antenna properties. The fork type antenna is analyzed for different substrates using the software HFSS.

Design and implementation of fork type fractal antenna for multiband

This paper describes the theory and technique for reducing the size of an antenna through the use of fractals. This fork shape fractal antenna can be used in satellite communications, terrestrial communications, and space communications and radar system. The dimensions of the proposed antenna are 42×42×3.26 mm. FR4_epoxy material is used as the substrate. The proposed antenna has the return loss, of -23.25dB, -17.37dB and -21.57dB at an operating frequency of 17.76GHz, 19.51GHz and 21.15GHz.

Rectangular grid type patch antenna for S band and X band applications

This paper present the design of rectangular grid type patch antenna especially for S Band and X Band applications. Now a days different antenna are used for different wireless application, so different band in communication system can be conventionally served in one antenna. This is achieved by formation of grid in patch antenna. For design of proposed antenna FR-4 substrate having thickness of 1.6mm is used as a substrate material. HFSS Software is used to design and simulate the proposed antenna. The return loss of −10db and less is achieved at frequency ranges of 3.6 GHz, 4.1GHz, 8GHz and 9.5GHz. The band width is gradually increased at different resonance frequency.

Development of smart meter

The proposed design is the work presented in this report explores wireless smart metering system that fully realizes the potential of smart grid. Real time monitoring of the electricity parameters like voltage, current, real and reactive power of the significant devices in a home is important for the control and optimization of the energy usage of those devices. However by optimizing the time of usage of heavy load devices, it is possible to make the electricity generation, transmission and distribution more stable and economically profitable. Granular control over the user devices is required to obtain this optimization goal. Wireless metering can enable the user as well as the utility to obtain that necessary control by providing real time data reading and by facilitating command and control. Smart power meter based on ZigBee communication has been proposed in for the Advanced Metering Infrastructure (AMI) of smart grid.

Wireless 3-D Gesture and Chaaracter Recoginition

A 3-d gesture recognition system can be used for a host of application including gesture base user interface, character recognition system, wireless human interface devices and virtual reality in 3d gaming. Human machine interaction has reached the point where machines are capable of interrupting gesture of human beings. The gestures are made by hand movement and facial expression. A gesture is detected and interrupted due to the movement of the hand and body. The data is wirelessly transmitted to the receiving station where for processing, some application.

Performance analysis of microstrip line matching network for 2.4 GHz microwave LNA via Matlab programming

As frequency increasing and correspondingly reduced wavelength, the influence of parasitics in discrete elements becomes more noticeable. This limits their use of in high frequency applications. As an alternative to lumped elements, distributed components are widely used when wavelength becomes significantly small compared with the characteristic circuit component length. Therefore, this paper presents a method to design matching networks using single stub microstrip line for input and output port of microwave LNA in a prescribed frequency band with requirements about the transducer gain flatness is presented. The superior performance characteristics of the microstrip line make it one of the most important medium of transmission in microwave transistor amplifiers in the microwave integrated-circuit technology. Matlab programming is used to obtain the Smith chart results for input and output microstrip line matching networks.