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
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)