Small Fractal Antennas

1 Problem
Antennas for hand-held communication devices are necessarily small, and typically use wavelengths
that are large compared to the size of the antenna. This typically implies that
the magnitude of the antenna reactance X (= imaginary part of the antenna impedance) is
large compared to that of its radiation resistance Rrad (which is related to the time-average
radiated power P and the peak current I0 at the feedpoint by P = I2
0Rrad/2), so that it is
challenging to build an effective imped ....etc

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http://seminarsprojects.net/Thread-smart-antenna-full-report

http://seminarsprojects.net/Thread-smart-antenna-system-features-and-benefits ....etc

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Submitted by
NEERAJ MANI TRIPATHI


ABSTRACT
A detailed study on the various next generation nature inspired geometry antennas
i.e. fractal antennas is performed. Mainly four types of printed fractal antennas i.e.
Sierpinski Carpet, Quasi Koch Fractal, Mix fractal and Sierpinski Gasket Fractal
are designed using 3D FEM based solver (Ansoft HFSS), which are basically
variants of Patch antenna. Maximum iteration is three and these antennas are fed
using three basic techniques Transformer Feed, Inset Feed and ....etc

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AN OVERVIEW OF SMART ANTENNA TECHNOLOGY FOR MOBILE COMMUNICATIONS SYSTEMS


WHAT ARE SMART ANTENNAS?
Base station antennas have up till now been omnidirectional
or sectored. This can be regarded as a waste of power as
most of it will be radiated in other directions than toward the
user. In addition, the power radiated in other directions will
be experienced as interference by other users. The idea of
smart antennas is to use base station antenna patterns that are
not fixe ....etc

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his paper mainly concentrates on use of smart antennas in mobile communications that enhances the capabilities of the mobile and cellular system such a faster bit rate, multi use interference, space division multiplexing (SDMA),increase in range, Multi path Mitigation, reduction of errors due to multi path fading and with one great advantage that is a very high security. The signal that is been transmitted by a smart antenna cannot tracked or received any other antenna thus ensuring a very high security of the data transmitted.
http://ziddudow ....etc

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1. Mobile Phone Signal Jammer for GSM, CDMA and 3G Networks with Prescheduled
2. Implementation of high sensitive GSM signal detector with audio visual alert indication
3. Implementation of model Radar target direction identifier with remote station alert system
4. Study of Parabolic Antenna for Direct to Home Communication
5. PC to Microcontroller Secured Data Communication using Fiber Optic communication
6. Ultrasonic Target Range Estimation using SONAR Technology
7. Implementation of data and voice communication from PC to GSM network ....etc

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Smart Antenna
ABSTRACT
One of the most rapidly developing areas of communications is Smart Antenna systems. This paper deals with the principle and working of smart antennas and the elegance of their applications in various fields such a 4G telephony system, best suitability of multi carrier modulations such as OFDMA etc. This paper mainly concentrates on use of smart antennas in mobile communications that enhances the capabilities of the mobile and cellular system such a faster bit rate, multi use interference, s ....etc

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Carbon Nanotube Antennas for Wireless Communications


Wireless System Evolution
Cellular:
2G GPRS 56-114 kbps
2.5G - EDGE up to 400 kbps (Evolved EDGE 1 Mbps)
3G:
HSPA 7.2 Mbps (AT&T completed 2009)
HSPA+ 21/42 Mbps
LTE/WiMAX/IMT-Advanced 100 Mbps and higher
LTE: 50 Mbps UL, 100 Mbps DL (deployment in 2012 by AT&T)

WLAN:
802.11n:
>100 Mbps in MAC
>3 bits/sec/Hz
802.11ac (< 6GHz) and 802.11ad (60 GHZ)
>500 Mbps page link throughput
>1 Gbps multiuser a ....etc

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Presented By:
Kulbir Singh1, Vinit Grewal2 and Rajiv Saxena3
1ECED, Thapar University, Patiala, India,
2 National Institute of Technology, Jalandhar, India
3Jay Pee Institute of Engineering and Technology, Raghogarh, Guna , M.P., India

Abstract
Wireless applications, particularly with multiple resonances, put new demands on antennas pertaining to size, gain, efficiency, bandwidth, and more. One promising approach in this regard is to use fractal geometries to find the best distribution of currents within a volume to meet a par ....etc

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pls give details of fiber antennas for free space communicTION ....etc

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