Rajeev Kumar Kanth

Design of multiband fractal antenna for mobile and handheld terminals

The main objective of this paper is to give detailed analysis of a Dual Band fractal antenna operating simultaneously at L and S Band. A L/S band Sierpinski fractal stacked multilayer patch antenna has been designed, and analyzed for achieving −4 dBi gain at ±50 degree using Ansoft Designer Tool. To evaluate the performance of this dual band antenna in comparison to two separate antennas, efforts are also made to design two separate triangular patch antennas resonating at individual L and S band frequencies. The analyzed performance of the antenna indicates two distinct frequency bands, meeting the VSWR requirement and its gain radiation pattern. The designed topology of the dual band fractal antenna can be employed for satellite navigation.

Insight into quantitative environmental emission analysis of printed circuit board

This paper presents quantitative analysis of environmental emissions in different life cycle stages such as raw material preparation (RMP) and production processing (PP) of printed circuit board. A general emission model for printed circuit board (PCB) has been developed to analyze the emissions to air, fresh water, sea water and industrial soil. This work also demonstrates the quantities of renewable and non-renewable resources that are required to manufacture PCBs. Based on these generic models, the environmental assessment has been carried out in a production of one million PCBs. We also make an attempt to give an analytic description for evaluating the amount of emissions in each life cycle stages of the printed circuit board.

Analysis, design and development of novel, low profile microstrip antenna for satellite navigation

International Telecommunication Union Radio Communication Sector ( ITU-R) has assigned 1.176 GHz and 2.487 GHz respectively in L and S band to Regional Navigational Satellite System (RNSS) for satellite navigation purpose. In this paper attempt has been made to design a novel, low profile compact microstrip antenna which achieves required specification such as gain of −4dBi up to ±50° and bandwidth of 30 MHz. The design of L band antenna was carried out using Ansoft Designer Version 2 software and was fabricated and measured the required performance of antenna in terms of its return loss, VSWR and gain radiation pattern. The return loss of the developed antenna was measured with the vector network analyzer and its gain radiation pattern in anechoic chamber and the performance of its measurements were compared with the analyzed results.

Metamaterial based slotted patch antenna

Metamaterial like EBG (Electromagnetic Band Gap) structures are used in slotted microstrip antenna and mobile handset applications for increasing efficiency and better return loss characteristics. As we know that traditional microstrip antennas have inferior feature in case of bandwidth. In this paper an antenna with slotted ground plane and patch has been developed in which EBG structure is used as a metamaterial above the ground plane for reducing surface wave losses. This antenna has desirable characteristics for use in mobile communications at two frequency bands (2067–2245 MHz) covering UMTS band and (2390–2795 MHz) covering ISM band whereas antenna using EBG structure is working at three frequency bands covering GSM, UMTS and ISM band. The patch size of this antenna is relatively small and is compatible with integrated circuits, and with EBG structures it covers three frequency bands.

Evaluating Sustainability, Environmental Assessment and Toxic Emissions during Manufacturing Process of RFID Based Systems

The present state of the art research in the direction of embedded systems demonstrate that analysis of life-cycle, sustainability and environmental assessment have not been a core focus for researchers. To maximize a researchers contribution in formulating environmentally friendly products, devising green manufacturing processes and services, there is a strong need to enhance life-cycle awareness and sustainability understandings among embedded systems researchers, so that the next generation of engineers will be able to realize the goal of a sustainable life-cycle. In this work an attempt has been made to investigate and evaluate the life-cycle management and environmental assessment in fabricating processes of the RFID based systems. We have chosen a general life cycle assessment approach which involves the collection and evaluation of quantitative data on the inputs and outputs of materials and energy associated with the RFID based systems. Based on the developed generic models, we have obtained the results in terms of environmental emissions for a production of paper substrate printed RFID antennas. We also make an attempt to raise several sustainability issues and quantify the toxic emissions during the manufacturing process.

Autonomous use of fractal structure in low cost, multiband and compact navigational antenna

Different fractal structures and their relevance in navigational antennas have been studied. Based on multiband characteristics and pe rformance of si erpinski gask et fr actal structures, a dual band, low profile antenna is devised in thi s paper. Cla ssical fra ctal st ructures h ave be en g enerated with extensive use of MATL AB, dime nsions o f the parasitic lay ers are determined v ia sev eral optimizations in Ma thCAD and finally design analysis is carried out using Ansoft Designer. The performance of this antenna is theoretically measured in terms of its return loss, gain radiation pattern and axial ratio. The multi layered physical antenna has been fabricated using glass epoxy substrate material contributing acceptable bandwidth in both bands. The measured performance of the fabricated antenna has been analyzed and evaluated with the theoretical outcomes.

Analysis, design and development of novel, low profile 2.487 GHz microstrip antenna

International Telecommunication Union Radio Communication Sector (ITU-R) has assigned 1.176 GHz and 2.487 GHz respectively in L and S band to Regional Navigational Satellite System (RNSS) for satellite navigation purpose. In this paper attempt has been made to design a novel, low profile compact microstrip antenna which achieves required specification such as gain of −4dBi up to ±50° and bandwidth of 30 MHz. The design of S band antenna was carried out using Ansoft Designer software, was fabricated and the required performance of antenna was measured in terms of its return loss, VSWR and gain radiation pattern. The return loss of the developed antenna was measured with the vector network analyzer and its gain radiation pattern in anechoic chamber and the performance of its measurements were compared with the analyzed results.

Information and communication system technology's impacts on personalized and pervasive healthcare: A technological survey

This paper presents information and communication system technological development towards personalized and pervasive healthcare systems. In the recent years, information and communication technology has been providing an innovative health care solution to the society. With the massive increase in aging and stressed population, the health care solutions necessitate the use of more in-home monitoring and tracking system. In this paper, we have gathered the data from early 1970s to present date in terms of information and communication technologys developments, use of wireless communication systems, and state-of-art of body area sensor network in personalized and pervasive health care. We have also put an effort to present our work in developing a robust, privacy compliant, accurate and cost-effective system that facilitates monitoring of patient status, patient activity and compliance with therapy. The proposed system will also be capable in developing patient-oriented services to support patient empowerment, self-care, adherence to care plans and treatment at the point of need.

Study on Glass-Epoxy-Based Low-Cost and Compact Tip-Truncated Triangular Printed Antenna

Printed antennas based on glass epoxy substrate have been developed. On the basis of required specifications and assigned frequencies, tip-truncated triangular printed antennas have been designed, analyzed, and fabricated. The performances of the antennas have been measured in terms of return loss, frequency of operation, bandwidth, and radiation pattern. Triangular microstrip antenna (TMSA) configuration consisting of copper as active radiating patch and glass epoxy as dielectric substrate has been screened out to achieve the essential characteristics and satisfying recommended low-cost antenna. The Method of Moment (MOM) analyzing techniques have been employed to realize the required specific properties, whereas optimized tip truncation technique and varying feed point location give rise to suitable LHCP or RHCP configuration of the printed antenna. The coaxial probe signal feed arrangement have been considered for this work. The proposed printed antennas are suitable for communication links between ships or buoys and satellites specially for navigation purpose.

Green wideband RFID tag antenna for supply chain applications

In this paper, we demonstrate an RFID tag antenna manufactured by advanced inkjet printing technology on paper substrate using novel hole-matching technique for reducing the consumption of substrat ...