iosr-JECE   Volume-14 ~ Issue-6 ~ Nov.-Dec. 2019

Abstract: One of the main concerns in actual antenna design is enhance bandwidth to cover the wide communications standards. Since years ago researchers work in newtechniques looking for better performance in this antenna behavior [1-5]. As others, our group have worked in different techniques to enhance antenna bandwidth as circular or quasi-circular structures, softening sharp corners for both ground and main structures, we also apply slots and cuts, modifying current distribution for field pattern uniformity [6,7].This paper presents application of those techniques over a small ultra-wide band antenna, working from 800 MHz to 10 GHz, covering most of the standards required for actual cellular phones but also for other applications, as satellite communications. Design is applied to a small patch antenna,looking -10 dB for S11 parameter; good field omnidirectional pattern response and an increasingly frequency linear gain. We use electromagnetic simulation to define the best patch and ground plane geometry, selecting a low cost substrate, with the best performance......

Keywords: Antenna, ultra-wide band antenna, multiple standard of antenna.

[1]. Hans G. Schantz, "A brief history of UWB antennas", IEEE Aerospace and Electronic Systems Magazine, vol. 19, 2004, Pp. 22-26.
[2]. J. Becker, D. Filipovic, H. Schantz, and S. Y. Suh, "Ultra-Wideband Antennas", International Journal of Antennas and Propagation, Hindawi, Publishing Corporation, 2008.
[3]. SebastianoBarbarino y FabrizioConsoli, "Effect of the substrate permittivity on the features of a UWB planar slot antenna", Microwave and optical technology letters, Vol. 52, No. 4, April 2010
[4]. Hemant Kumar Varshney, Mukesh Kumar, A. K. Jaiswal, RohiniSaxena and KomalJaiswal "A Survey on Different Feeding Techniques of Rectangular Microstrip Patch Antenna" International Journal of Current Engineering and Technology, Vol. 4 No. 3 June 2014
[5]. AnindyaGhosh, Malay Gangopadhyay, "Bandwidth Optimization of Microstrip Patch Antenna A Basic Overview" International Journal on Recent and Innovation Trends in Computing and Communications, Volume 8 Issue 2 February 2018

Abstract: This Project implements Emergency Retrieval(ER) system for unconscious patients using Medical Bracelets offers an empowering option for individuals affected with chronic illnesses or medical conditions who may present more frequently to the Emergency Medical Service. The project is trying to provide medical help at correct time to an unconscious patient or patient who is unable to communicate can lead to delays in treatment. With Medical Bracelets emergency departments improve efficiency while enhancing the level of patient care. If you have a medical condition such as a life threatening food or medicinal allergy, a pre-existing medical condition or maybe even a rare blood type, a medical bracelet may be the only communication you have to let emergency medical staff know so that they can provide the proper treatment for you without potentially doing more harm. RF Transmitter is used as Medical Bracelet. Receiver section is equipped with RF receiver.

Keywords: Emergency Medical Service(EMS),Radio Frequency(RF),radio frequency identification (RFID),Emergency retrieval(E.R)

[1]. Shivangi Agarwal, Asha Rani,Vijander Singh ,A. P. Mittal "FPGA Based Wireless Emergency Medical System for Developing Countries",2015 Annual Global Online Conference on Information and Computer Technology (GOCICT),available at https://ieeexplore.ieee.org/document/7545102
[2]. REED M. GARDNER AND M. MICHAEL SHABOT,"Patient-Monitoring Systems",available at http://eknygos.lsmuni.lt/springer/56/585-625.pdf
[3]. Why is India's emergency healthcare system in tatters? Available:http://www.thehealthsite.com/news/why-is-indias-emergencyhealthcare-system-in-tatters/
[4]. Emerging Healthcare: Available:http://modernmedicare.co.in/articles/emergency-healthcaretakingoff-to-the-next-level
[5]. Chanakya Mothukuri1 , K. CH. Prathap Kumar. M,"Patient Monitoring System",International Journal of Science and Research (IJSR), India Online ISSN: 2319‐7064

Abstract: VLSI technology has developed over the year's enhancing the performance of chips in terms of two basic constraints viz., delay and power. This paper basically focuses on the implementation of the technique on combinational logic circuits and experimental delay results have been produced. A 4*4 array multiplier can be designed using logical circuits such as AND gate, EXOR gate, Full adder and Half adder .The multiplier is designed using Gate Diffusion Input (GDI) technique. Multiplier is implemented in digital schematic tool. The Layout of the multiplier is obtained and power is calculated in microwind tool along with input and output analysis. This paper shows the comparative study of 4*4 array multiplier using GDI and CMOS technique. The comparative study between GDI and CMOS technique shows GDI is the better one in terms of delay and area.

[1]. K. Yano, Y. Sasaki, K. Rikino, and K. Seki, "Top-down pass-transistor logic design," IEEE J. Solid-State Circuits, vol. 31, pp. 792–803, June 1996.
[2]. T. Sakurai, "Closed-form expressions for interconnection delay, coupling, and crosstalk in VLSI's," IEEE Trans. Electron Devices, vol. 40, pp. 118–124, Jan. 1993.
[3]. V.Adler and E.G.Friedman, "Delayand power expressions for a CMOS inverter driving a resistive-capacitive load," Analog Integrat. Circuits Signal Process., vol. 14, pp. 29–39, 1997.
[4]. J. R. Burns, "Switching response of complementary symmetry MOS transistor logic circuits," RCA Rev., vol. 25, pp. 627–661, Dec. 1964.
[5]. A. Morgenshtein, A. Fish, I.A Wagner, 2002, "Gate-Diffusion Input(GDI)-A Power efficient Method for Digital Combinational Circuits", IEEE Tran.VLSI,Vol.10,n0.5 pp 566-58