H-Plane Sectoral Horn Antennas in Substrate-Integrated Waveguide Technology Electrical and

113 Pages·2017·62.19 MB·English

by  Guilherme Silva

H-Plane Sectoral Horn Antennas in Substrate-Integrated
Waveguide Technology
Guilherme Coelho Grácio da Silva
Thesis to obtain the Master of Science Degree in
Electrical and Computer Engineering
Supervisor: Prof. Custódio José Oliveira Peixeiro
Examination Committee
Chairperson: Prof. José Eduardo Charters Ribeiro da Cunha Sanguino
Supervisor: Prof. Custódio José Oliveira Peixeiro
Member of the Committee: Prof. Marco Alexandre dos Santos Ribeiro
November 2017
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Dedicatedtomybelovedfamilyandfriends
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Acknowledgments
First and foremost, I would like to thank my supervisor Professor Custo´dio Peixeiro for all support,
dedication,knowledgeandguidance,providedcontinuouslyduringthedevelopmentofthepresentwork.
To Instituto Superior Te´cnico, the school where I found the tools and knowledge that helped me
completethishardjourney.
Toallmycolleagueswhichhelpedmethroughoutthisdegree,Iamdeeplygrateful.
To Mr. Jorge Farinha and Mr. Anto´nio Almeida for the knowledge, experience and ability for the
constructionandtestsoftheprototypes.
Tomyparents. Ioweeverythingtothem,andIwillbeforevergratefulfortheirunconditionalsupport
andencouragementduringmyentirestudentlife.
Tomyfriendsforenduringthisprocesswithmeandalwaysofferingsupport,adviceandloveduring
thetoughesttimes.
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Resumo
A comunicac¸a˜o e a transmissa˜o de informac¸a˜o sem fios tornaram-se uma parte essencial da nossa
sociedade e economia actual e a sua importaˆncia e interesse esta˜o a aumentar continuamente a um
ritmoacelerado. Asantenassa˜oelementosessenciaisdequalquercomunicac¸a˜osemfios,oqueimplica
quemelhoriasestejamsempreaserestudadasparaacompanharaevoluc¸a˜odemuitossistemassem
fios e melhorar a qualidade das comunicac¸o˜es. Medir antenas e´ um processo meticuloso que e´ feito
quasesempreusandoantenaspadra˜o.
Esta dissertac¸a˜o tem como objectivo estudar antenas corneta de sector magne´tico usando a tec-
nologia substrate-integrated waveguide (SIW) para serem utilizadas como antenas padra˜o no Instituto
deTelecomunicac¸o˜es/InstitutoSuperiorTe´cnicoeassimmelhoraracolecc¸a˜odeantenaspadra˜oexis-
tente. Nestecontexto,atecnologiaSIWpermiteobtercornetasdepesoaceita´veleta˜orobustascomo
ascornetaspiramidaispadra˜o. Estatecnologiapermitedimensionarestruturasplanarescompactas.
Para cumprir estesobjetivos, um par decornetas no plano H usandotecnologia SIW foi projectado
e constru´ıdo. Este par de antenas foi dimensionado para utilizac¸a˜o na banda-L de microondas, com
ganhode10dBinafrequeˆnciacentral. Umatransic¸a˜ocoaxial-guiafoiintegradanosproto´tipos.
O dimensionamento e as simulac¸o˜es em espac¸o livre foram realizadas usando o software CST
MWS.Apo´saconstruc¸a˜odasantenas, oseudesempenhofoimedidousandoumanalisadorderedes
vectorial e uma caˆmara aneco´ica, permitindo uma comparac¸a˜o dos resultados experimentais com os
simulados. Aboaconcordaˆnciaobtidapermitevalidarosprocedimentosutilizadosnoprojectoeprovar
oconceitoproposto.
Palavras-chave:
Antenacornetadesectormagne´tico,Substrate-integratedwaveguide(SIW),
Antenasdeganhopadra˜o,Transic¸a˜ocoaxial-guia,Banda-L
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Abstract
Communication and wireless transmission of information has become an essential part of our current
society and economy and its importance and interest is continuously increasing at an acelerated pace.
Antennas are essential elements of any wireless communication, which implies that improvements are
always under study to follow the developments of many wireless systems and improve the quality of
communications. Measuringtheperformanceofantennasisameticulousprocesswhichismadebythe
useofstandardgainantennas.
Thisdissertationaimstostudysubstrate-integratedwaveguide(SIW)H-planesectoralhornantennas
tobeusedasstandardgainantennasinInstitutodeTelecomunicac¸o˜es/InstitutoSuperiorTe´cnicoand
enhance the existing standard gain antennas collection. In this context, the SIW technology allows to
build horns of acceptable weight and as robust as the standard gain pyramidal horns. This technology
allowstodesigncompactplanarstructures.
Inordertofulfilltheseobjectives,onepairofSIWH-planehornshavebeendesignedandmanufac-
tured. ThispairofantennashaveworkingfrequencyinthemicrowavesL-bandandgainofabout10dBi
atthecentralfrequency. Acoaxial-to-waveguidetransitionhasbeenintegratedintheprototypes.
The design and the free space simulations were performed using the CST MWS software. After
manufacturing the antennas, its performance was measured using a vector network analyzer and an
anechoic chamber, and thus allowing a comparison of experimental and simulated results. The good
agreementobtainedprovidedvalidationofthedesignprocedureandprovedtheproposedantennacon-
cept.
Keywords:
H-plane sectoral horn antenna, Substrate-integrated waveguide (SIW), Standard
gainantenna,Coaxial-to-waveguidetransition,L-band
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