to college DESIGN OF TAPER SLOT ARRAY FOR ULTRA WIDE review 1.1.ppt

DESIGN OF TAPERED SLOT ARRAY FOR ULTRA WIDE BAND ANTENNA

APPLICATIONGuided by

Dr.Abhai kumarProfessor-Department of ECE

submitted by S.Srinivasan

M.E – Communication systems

INTRODUCTIONUltra-Wide band Technology:• Ultra-Wide band Technology transmits digital data over a

wide spectrum of frequency bands with very low power. • Ultra wideband radio can carry a huge amount of data over a

distance up to 230 feet very low power (less than 0.5 milliwatts).

• At higher power levels, UWB signals can travel to significantly greater ranges.

• Ability to carry the signals through door.• Its range is about >500MHZ to several GHZ

Applications of UWB Technology:• Radar: which the signal penetrates nearby surfaces but

reflects surfaces that are farther away, allowing objects to be detected behind walls or other coverings.

• Communication Application: Voice and data transmission using digital pulses, allowing a very low powered signal to carry information at very high rates within a restricted range.

• Positioning Applications: UWB devices can be used to measure both distance and position. UWB positioning systems could provide real time indoor and outdoor precision tracking.

• Medical Application: Medical Imaging and to monitor the patient moments.

Why UWB?• Compared with other technologies UWB technology allows an

unprecedented amount of high-density bandwidth applications, cost-effective, power-efficient.

Characters of UWB Antenna:• Small electrical length.• Operates for wider bandwidth.

OBJECTIVE

• To design tapered slot antenna array .• Increased gain.• Ultra wide band.• Dual slant polarization.

LITERATURE SURVEYPaper Year Author Description

Time-Domain Design of UWB Vivaldi Antenna ArrayUsing Multiobjective Particle Swarm Optimization

2010

Somayyeh Chamaani, Member, IEEE, Mohammad Sadegh Abrishamian, and Seyed Abdullah Mirtaheri

A method to obtain optimum tradeoffsbetween sidelobe level (SLL) and beamwidth (BW) in time domainfor ultrawideband (UWB) antenna arrays is presented.

Balanced Antipodal Vivaldi Antenna With DielectricDirector for Near-Field Microwave Imaging .

2010

Jeremie Bourqui, Member, IEEE, Michal Okoniewski, Fellow, IEEE, and Elise C. Fear, Member, IEEE

A balanced antipodal Vivaldi antenna is designed to be used as a sensor for a microwave breast cancer detection system.

A Single Polarized Triangular Grid Tapered-SlotArray Antenna

2009

Anders Ellgardt and Andreas Wikström

A triangular grid single polarized tapered-slot arrayantenna for radar applications is studied.

A Small Antipodal Vivaldi Antenna forUltrawide-Band Applications

2008

Aaron Zachary Hood, Student Member, IEEE, Tutku Karacolak, Student Member, IEEE, andErdem Topsakal, Senior Member, IEEE

A compact antipodal Vivaldi antenna for ultrawide- band (UWB) applications is proposed based on two different substrate.

Vivaldi Antennas for Microwave Imaging:Theoretical Analysis and Design Considerations

2006

Marco Chiappe and Gian Luigi Gragnani

The geometrical and electrical features of the Vivaldi antenna are studied in the light of the frequency-independentantenna theory.

Dual-Polarized Wideband WidescanMultibeam Antenna System FromTapered Slotline Elements Array

2005

Jacob Remez, Avigdor Segal, and Refael Shansi

The progress in the radiating array design is followed in our paper with feeding structures that feed the radiating array. The final goal is to realize a complete dual-polarized multibeam antenna system with the same capabilitiesof the radiating array.

Study and Design of a Differentially-Fed TaperedSlot Antenna Array

2003

Vincent F. Fusco, Senior Member, IEEE, and Patnam Hanumantha Raodiscription

A traveling-wave subarray is used togenerate wide-band dual slant 45 polarization. The antenna exhibits well-defined radiation patterns over a bandwidth of 1.7 to 2.7 GHz

Study and Design of a Differentially-Fed Tapered Slot Antenna Array

2002

Eloy de Lera Acedo, Student Member, IEEE, Enrique Garcia, Member, IEEE, Vicente González-Posad José Luis Vázquez-Roy, Rob Maaskant, and Daniel Segovia, Member,IEEE

The results of a parametric study and design of an ultra wideband dual-polarized array of differentially-fed tapered slot antenna elements are presented.

Copolar and Cross-Polar Radiation of VivaldiAntenna on Dielectric Substrate

2000

Benoit Stockbroeckx and Andre Vander Vorst, Fellow, IEEE

The copolar and cross-polar radiation patterns of the Vivaldi antenna on a dielectric substrate are calculated andvalidated by measurements.

Analysis of the tapered slot antenna

1987 Janaswamy.,R.Naval and D. H. SchaubertPostgraduate School,Monterey, CA, USA, IEEE Trans. Antennas Propagat., Vol. AP-35, 1058-1064, 1987.

Paper discribes a method for calculating the radiation pattern of end-fire tapered slot antennas with or without dielectric substrate is presented. The method involves a two-step procedure: 1) determine the field distribution of a traveling wave along the tapered slot, and 2) compute the radiation from this slot field by using the half-plane Green's function to account for termination effects. Acceptable estimates of the slot field usually can be obtained from a stepped approximation to the tapered geometry

The Vivaldi Aerial 1979 Gibson, P.J. Philips Research Laboratories, Redhill, Surrey, England. , IEEE Trans ,Microwave Conference, 1979. 9th European

This paper discusses about the aperiodic continuously scaled antenna structures and, as such, it has theoretically unlimited instantaneous frequency bandwidth. One such design has been made with approximately 10 dBI gain and 20 dB sidelobe level over an instantaneous frequency bandwidth extending from below 2 GHz to above 40 GHz.

SPECIFICATION

• Band width: 8 to 16 GHZ.• VSWR: 2:1.• Hplane 3dB beamwidth:120°.• Eplane 3 dB beamwidth:60°.• Gain:-4.6dB for 8GHZ, .14 dB for 9GHZ,3.5 dB for 9 to 16GHZ.

DESIGN ISSUES

• To design a taper slot antenna for wide bandwidth.• obtain the dual slant polarization using the taper slot

antenna.• choose the proper feeding technique.

• design strip line to slot line transition.

Vivaldi Antenna - Theory• The Vivaldi antenna is a special type of Tapered Slot Antenna

with an exponential flare profile.• They produce a symmetrical end-fire beam with appreciable

gain and low side lobes.• An important step in the design of the antenna is to find

suitable feeding techniques.• Thus to achieve a wider bandwidth The transition from the

main input transmission line to the slot line for feeding the antenna. This is designed for a low reflection coefficient to match the potential of the antenna.

• The curvature of tapered profile has a significant impact on the gain, beamwidth and bandwidth of tapered slot antennas.

Vivaldi Antenna - Design•The microstrip is an unbalanced transmission line while the medium used for feeding the Vivaldi is a slot line which is a balanced medium. •The microstrip line is terminated in an open circuit a quarterwave away, while the slot-line is terminated in a short circuit, one quarter-wave away. The effect of this interface ,the energy in the microstrip is fed to the slot line, and propagates to the right.

• The radius of the radial microstrip stub (Rrad) and the diameter of the circular slot stub (Ds) may be approximated by λm/4 and λs/4, respectively.

• The λm is the effective wavelength of the micro strip and λs is the effective wavelength in the slotline

ACTION PLAN

Simulation and validation

Tolerance study based on fabrication aspects

Release of dimensions for CAD drawing

Deign of exponential taper with taper feed

synthesis of dimensions

Optimization

Design of balun M-S transition

Simulation and Validation

Design of exponential taper

Simulation and Validation

Layout Model

• The layout of the vivaldi antenna was simulated using a FDTD based Simulator (CST microwave Studio)

Return lossSimulated Return loss

3 D Radiation patternFreq 8GHz

Freq 10GHz

3 D Radiation patternFreq 12GHz

Freq 14GHz

3 D Radiation patternFreq 16GHz

REFERENCES1. Wide-Band Dual Slant Linearly Polarized AntennaVincent F. Fusco, Senior Member, IEEE, and Patnam Hanumantha Rao 2003

2. The design of a dual polarized vivaldi array Microwave journel 2004 by Adrian T. Sutinjo, Edwin Tung

3. Design of a Compact Tapered Slot Vivaldi Antenna Array for See Through Concrete Wall UWB Applications Yazhou Wang, Aly E. Fathy EECS Department, University of Tennessee, Knoxville, USA 2006 [email protected]

4. Parametric study and design of vivaldi antennas and arrays A thesis submitted to the graduate school of natural and applied sciences of middle east technical university by yakup erdoan 2009.

5. Basic Properties and Design Principles of UWB Antennas By Werner Wiesbeck, Fellow IEEE, Grzegorz Adamiuk, Student Member IEEE, and Christian Sturm, Student Member IEEE 2009

6. Designing Vivaldi Antenna with Various Sizes using CST Software proceedings of the world congress on engineering 2011 vol ii wce 2011, july 6 - 8, 2011, london, u.k. by NORHAYATI HAMZAH, KAMA AZURA OTHMAN.

Thank you