INDEX

Aanandan, C.KAgarwalAlexopoulos, N.GAn,HAnalysis

aperture modelelectric field variationinput impedancemagnetic wall model formationmulti-port connection methodpower radiatedquality factorradiation patternresonant frequencysegmentationstored energy

Antennasarray antennasdigital beam formingelectromagnetic hornelectronic eyes and earsheliceslinear conductorloopsreflectorswire antennas

Antennas; micro strip antennas

22,2616232493

11310712794

10012012711610295

1251222122222

2, 19

active antennasaperture couplingaperture modelarbitrary shaped antennasbandwidth enhancementbandwidth improvementbasic configurationboundary conditionsbroadband microstrip antennasbroadside directionbunny antennaburied feedC-shapedcavity modelcircularcoaxial feedcompact microstrip antennadesegmentation techniquedielectric constantdielectric lossesdielectric substratedrawbacksdrum-shaped microstrip antennadual frequency operationelectric wallselectric surface currentselliptical antenna

247

16I I

8, 2219

.3974

176

268,9,16

3. 85

8,26,29.322019193.3

321799

18

171

2124

16011

147148148148149149148149149148151149

IS17, 18

1381831292017

156141143143145142145142143

141, 142113137138137138136139137137139137139138139139

137. 139138139136138137138138138

113,126

ByronCarverCavity modelChadha, RChen, H.TChen, W.SChiba, TCipollaCircular microstrip antennaCompact dual frequency microstrip antenna

central widthcentre of the radiating edgeeo and cross polar patternsexperimental setupgainminiature dual frequencyresonant frequenciesshorting pin

Computed electric fieldarea requirementcavity modelcentral widthelectric field amplitudeexperimental investigationfield variation along the peripheryfrequency tuninggainimpedanceless areamode of operationport currentspossible applicationspower radiatedradiation patternrectangularresonant frequencyresonatingsegmentation techniqueshift of resonant frequencyspatial fourier transformtheoretical investigationtriangular

Cosine quarter wave

BhatnagarBokhari, S.ABooksBose, lC

short wavesBroadband dual frequency microstrip antenna

comparable gainelectromagneticallyintersection of Two circlesisolationlinearly polarisedproximity couplingradiation patternsreturn lossRT/Duroidtheoreticaltwo frequencies

BaileyBandwidthBandwidth enhancementBartelyBenalla, A

excitation techniques 4finite difference time domain 8, 10, 23finite element method 8, 10, 17generalised transmission line model 24Green's function 10,20ground plane 20H-shaped 21, 26ideal transmission line 9impedance bandwidth 18, 23integral equation 9log-periodic 20magnetic wall 9, 16Maxwell's curl equations 10method of moments 9,16,24,25microstrip antenna 2, 3microstrip feed 4, 6modelling 15models/techniques 8multiport network approach 23new geometrical shapes 8parasitic element 19,22, 25parasitic patch 7personal communication systems 8phased arrays 25piggy back antenna 17proximity coupled 7,25~~ti~~~ 9radiation 3radiation fields 16radiation losses 11radiation mechanism 4rectangular 3, 8, 9rectangular ring 26Richmond's reaction theorem 16segmentation technique 8, 11,23shorting posts 8, 27slot feed 7spherical annular microstrip 24square 9substrate thickness 19surface currents 16surface waves 8thicker substrates 7transmission line model 8,9,21trapezoidal shaped patch 17triangular 29U patch antenna 27wire grid model 16

Aperture model 113aperture field lISequivalent aperture antenna 113infinite conducting plane 116magnetic wall model 116radiation 116spatial fourier transform 113

1644

14017

22,23

172

GultonGupta, K.CHallHammerHeinrich rudolph hertz

end loaded half-wave dipolesquare loop antenna

Hemandez, D.SHowellHuang, c.vHwang, YImpedance bandwidthImpedance matrix element

300_600_900 triangular segment45°-45°-900 triangular segmentrectangular segment

Input impedancecomplex permittivityeffective loss tangentimpedance matrix elementsenergy lostwave number

Interconnection constraints

III107III1I0III110363636333334

34,35962143

1379417

39, 78, 137, 145comparative measurement 39gain transfer method 78network analyzer 39rectangular antenna 39relative gain 39wideband ridged horn 78

Gardiol 21Garg, R 21, ~2, 26George, J 28Green's function 103, 107, Ill, 112

30°_60°_900 triangular segment 112450_45°_900 triangular segment 112middle segment 111

Green's functions 18, 98Guglielmo marconi 2

transatlantic communication 2wireless signal 2

1518,19,22,23

2216

111

323, 15

322787

103,106104106103127128127128127128102

FFNTFongFrequency bandFrequency tuningFringing fieldsFurlongGain

field variation along the peripheryGreen's functionrectangularsimultaneous equationsZ-directed electric field

Excitation current densityExcitation techniques

coaxial feedmicrostrip feed

Fabrication of microstrip antennadimensional tolerancefast fabrication processphotolithographic technique

15520

9, 152, 15

1927,29

154155156155156

154,1551581551582723

32,42939741444241587842426340424242424141

41,44,63404341934344404225149999993939393939

107113113110110

Cylindrical dielectric resonatorDasDernerydDeschampsDeshpande, M.DDey,SDielectric resonator loaded microstrip antenna

antenna configurationcircular microstrip antennacylindrical dielectric resonatorcylindrical DRimpedance bandwidthradiation patternsrectangular microstripVSWR

Douglas, M.GDrewniak, lLDrum-shaped microstrip antenna

analysisantenna configurationsaperture modelbandwidthcompact microstrip antennaelectric field variationfrequency tuninggaingeometryglobal positioning systemimpedance bandwidthimpedance matrixJapanese drummobile satellite corrununicationpersonal corrununication systemphased arrayspower radiatedQ-factorradiation patternrectangularresonant frequencystored energytheoreticalTM0 1 modeTMlOmodetriangularUHF and L-bands

Duffy, S.MEarlier work in the fieldEffective dielectric constant

rectangular segmenttriangular segment

Electric field intensitynetwork analyzerprobe assemblyprobe platesemirigid cable

Electric field variationcomputed electric fieldcosine quarter waveelectric field at a pointexcitation current density

173

16,1825

21,22,2629282

20139139139139120125125

22,25120

21148

21127127127116

37,87,116,137117117118116119383838

12011637

11811944

220

15516023

44,49,82,102,1361031031023637

10921

925

27-29153117959595

NewmanOhmine, HPalanisamy, VPan, S.CPark, IPersonal communication systemsPoddar, D.RPossible applications

global positioning systemMMICspersonal communication systems

Power radiatedcomputationradiated power

Pozar, D.MPrincipal plane patternsPriorProximity couplingPues, HQuality factor

total power losttotal stored energy

Radiating apertureRadiation pattern

aperture excitation fieldscomputation of radiation patternsfar field componentsfield vriations along the peripheryFourier transformMERLsoftnetwork analyzerpositioner controllerprincipal plane patternsradiating apertureridged hornspatial fourier transformstotal far field

Radiation patternsRamsayRayleigh-ritz methodRectangular microstripReferencesReineix, AResonant frequency

cavity under the patchGreen's functioninput reactance

Return losssetup for the measurement

RF currentsRichards, W.FRichmond's reaction methodRowell, C.RSanad, MSanfordSatpathy, S.KSchaubertSegmentation

Green's functionrectangular

148192516232627

161242217243026

22220242029

14916291831

94,11694959495412317

36,3733403639363339373636

14218

28,292

13521

100100100102

3,9,152517

22,267836

Intersection of two circlesItoh, Tlwasaki, HJamesJecko, BJin, J.MJohnston, R.HJournal/symposium papersKashiwa, TKaufman, BKerrKishk,A.AKokotoff, D.MKossiavas, GKraus, J.DKurnar, GLeeLee, K.FLier, ELin, Y.FLinearly polarisedLoLo, T.KLongLu, lHMagnetic wall model

fringing fieldsheight of the substrateoutward Edge extensionsvirtual patch geometry

MATHEMATlCAMayes, P.EMcilvennaMerl softMethodology

analysis of the antennabandwidthelectric field intensityexcitation techniquesfabrication of microstrip antennagainradiation patternresonant frequencyreturn loss measurement

Miniature dual frequencyMinkMittra, RMobile satellite communication systemsModeling of fringing fieldMosigMulti-port connection method

connected portsexternalinterconnection constraints

MunsonMurch, R.DMurphyNair, K.GNear field probingNetwork analyzer

174

98,100,102.1079827

Z-matricesGreen's functions

Zhang, Y

979895

18,201825

141, 14230

113, 118, 13896

125, 12612612512612512512620243093

13849495878786349787863584963

49,5882,92

828787828223964232262328

28,30151716

29-3117, 19

3023

30,311726

segmentation into five segmentssegmented antenna Geometrytnangular

Sharma, P.CShenShen, X.HShorting pinSingh, DSpatial fourier transformStntStored energy

cosine quarter wave variationelectric and magnetic field energyrectangular segmentstored energy under a segmenttotal stored energytriangular segment

SUZUkl, YSvitak, AJTang, T.LTheoretical interpretationsTheoretical investigationTMo, mode

central widthfrequency tuninggaingain transfer methodimpedance bandwidthlinearly polarisedmode identificationnear field probingpercentage bandwidthphysical arearadiated fieldsradiation patternresonant frequency

TM IO modecentral widthimpedance bandwidthradiation patternresonant frequencyunmodified side

Tripp, V.KTsntUhf and l-bandsVaello, A.SVolakis, lLWang, U.HWaterhouse, RWaterhouse, R.BWeinschelWcissWilsonWong,K.LWoodWu, r.vYang, H.YYang, K.PYeeYung, E.K.N

LIST OF PUBLICATIONS OF THE AUTHOR

INTERNATIONAL JOURNAL

1. New Compact Microstrip Antenna, Electronics Letters(UK), vo1.32, No. 6, pp. 508-509,1996

2. Broadband Dual Frequency Microstrip Antenna, Electronics Letters(U.K), vol. 32, No.n, pp.1531-1532, 1996

3. Dielectric Resonator loaded Microstrip Antenna for Enhanced Impedance Bandwidth andEfficiency, Microwave and Optical Technology Letters (USA), vol. 17, No.3, pp.205­207,1998

4. Dual Frequency Miniature microstrip antenna (accepted for publication in ElectronicsLetters, UK, Issue No. 12, 1998)

5. Analysis of a compact microstrip antenna (accepted for publication in IEEETransactions on Antennas and propagation)

SEMINAR I SYMPOSIA

1. A Broadband Low Profile Microstrip Circular Patch Antenna, Proc. IEEE AP-S

176

International Symposium (USA), 700-703, 1995

2. A method for Lowering the Resonant Frequency ofa Rectangular Microstrip Antenna,IEEE AP-S International Symposium (USA), 1996

3. A Peripherally fed Broadband Modified Circular Microstrip Antenna, IEEE AP-SInternational Symposium (USA), 1996

4. Investigations on the band-width enhancement effect of dielectric resonator loadedmicrostrip antenna, presented in the Asia Pacific Microwave Conference APMC-96

5. A broad band microstrip antenna for dual frequency operation, presented in the AsiaPacific Microwave Conference APMC-96

6. Microwave Dielectric Properties ofBa(B'112Nbln)03 {B'=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy,Er, Y & In} Ceramics, Proc. ofAdvances in Microwaves and Light waves, New Delhi,1998.

7. A modi fied compact circular patch antenna, Proc. of the National Symposium onAntennas and Propagation (APSYM - 94), Cochin 682022,1994.

8. Design and development of a high Tc superconducting low pass filter at microwavefrequencies, Proc. of the National Symposium on Antennas and Propagation (APSYM­94), Cochin 682022, 1994.

9. Dielectric resonator loaded compact microstrip circular patch antenna, Proc. of theNational Symposium on Antennas and Propagation (APSYM - 96), Cochin 682 022,1996.

177

BIO-DATA OF JACOB GEORGE. Department of Electronics

Cochin University of Science and Technology, Cochin 682 022

Kerala, India

Phone: 91 484532161, Fax: 91 484532800

E-mail.cusatdoe@rnd2.vsnl.net.in

OBJECTIVE

To involve in Research and Development activities in the field ofAntennas, numerical modeling and biomedicalapplications ofelectromagnetics.

AREAS OF INTEREST

Computer aided design and development ofMicrostrip Antennas, biomedical applications ofelectromagnetics andhigh frequency measurements.

EDUCATION

a) Master of Science in Electronics Science

Specialization inArtificial Intelligence and Robotics, Cachin University ofScience and Technology, Cochin, India (April1993).

Score Obtained -1965/2400 (Fist rank withdistinction)

Project and Thesis

Design and Implementation ofaMicroprocessor based Distributed Digital Control System forRobotics and IndustrialProcess Control Applications.

b) Bachelor ofScience inPhysics

Mahatma Gandhi University, Kottayam , Kerala, India (JUly 1990).

Score Obtained - 900 /1000. (Fist class withdistinction)

POST GRADUATE LEVEL COURSES

a) M.Sc Electronics Science

System Theory & Circuit Analysis Artificial Intelligence

Electronic Circuits Robotics

Applied Quantum Electronics Physics ofSemiconductor Devices

Communication Electronics Numerical Methods

Electromagnetic Theory IC Technology &Transducers

Control System Microprocessors

b) Ph.D. course work

Microwave Network and Devices Microwave Antennas

178

COMPUTER PROFICIENCY

Operating Systems

General Applications

Technical Applications

Languages

RESEARCH AND WORK EXPERIENCE

DOS, WINDOWS 95/NT, UNIX

Proficient inMS OFFICE.

MATHEMATICA, MATLAB, PUFF,L1BRA

HP BASIC, VISUAL BASIC, FORTRAN, C, LISP, PROLOG,PASCAL.

1. Currently working as aSenior Research Fellow inthe Department ofElectronics, Cochin University ofScience andTechnology, Cochin, India. Present area ofresearch isthe theoretical simulation of the characteristics ofmicrostripantennas (NOV 1996 onwards).

2. Worked as aJuniorResearch Fellow inDepartment ofElectronics, Cochin University ofScience and Technology,Cochin, India. Was engaged in full time research in Microstrip antenna design and evaluation. Results include twonovel Microstrip patch antenna configurations. (AUG. 1993·OCT 1996).

3. Worked as aco-op engineer atAllied Electronics, Madras, India.(SEPT. 92- JUNE 93)

TECHNICAL SEMINARS ATTENDED

1. Attended and presented technical papers inthe VIII ASIA PACIFIC MICROWAVE CONFERENCE (APMC '96)held atNew Delhi.

PROJECTS COMPLETED

1. Conceived, fabricated and tested one new Microstrip antenna geometry for broadband, multi-port, dual frequencyoperation (please see the list ofpUblications).

2. Conceived, fabricated and tested one new Compact Microstrip antenna geometry for applications which demandcompact antennas (please see the listofpublications).

3. Designed aMicroprocessor Based DC Servomotor Control System with Optical Encoder.

4. Designed, fabricated and successfully tested a Shared Memory Data Transfer Scheme forInter-Processorcommunication inaParallel Processing environment using multiple microprocessors.

5. Designed and fabricated aDistributed Digital Control System forRobotic actuator control.

6. Developed Visual BASIC code for the automatic radiation pattern measurement using hp 8510B Network Analyzer

7. Worked towards the development ofacomputer controlled antenna positioner forthe automatic radiation patternmeasurement

ACADEMIC HONORS

1. First Class with Distinction (equivalent tohighest honor) inB.Sc. (Batchelor ofScience)

2. First Class with Distinction and First Rank (equivalent tohighest honor) inM.Sc. (Master of Science)

AWARDS & FELLOWSHIPS

1. First rank in the Msc Degree Examination, Cochin University ofScience and Technology, Cochin, India

2. Qualified in the National Eligibility Test forLectureship and Research fellowship (University Grants Commission,Govt. ofIndia)

3. Senior Research Fellowship (Council ofScientific and Industrial Research, Govt. of India)