Metamaterial Surface Plasmon-Based Transmission Lines and Antennas

97 Pages·2018·3.92 MB·English

by  Amin Kianinejad

Springer Theses
Recognizing Outstanding Ph.D. Research
Amin Kianinejad

Metamaterial
Surface
Plasmon-Based
Transmission Lines
and Antennas
Springer Theses
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Amin Kianinejad
Metamaterial Surface
Plasmon-Based Transmission
Lines and Antennas
Doctoral Thesis accepted by
the National University of Singapore, Singapore
123
Author Supervisor
Dr. AminKianinejad Prof. ZhiNingChen
Department ofElectrical andComputer Department ofElectrical andComputer
Engineering Engineering
National University ofSingapore National University ofSingapore
Singapore Singapore
Singapore Singapore
ISSN 2190-5053 ISSN 2190-5061 (electronic)
SpringerTheses
ISBN978-981-10-8374-7 ISBN978-981-10-8375-4 (eBook)
https://doi.org/10.1007/978-981-10-8375-4
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’
Supervisor s Foreword
Advancedelectroniccircuitsandsystemsarecomposedoftheguidingwave-based
electronicdevicesandcomponentswithdoublemetalconfigurations.Recently,the
spoofsurfaceplasmon(SSP)modeshavebeenproposedasanovelconceptforthe
design of electronic circuits. With the high field confinement, the SSP-based
structuresdonotsufferfromthecompactnesslimitationsofconventionalcircuitsso
that they are capable of playing the new and crucial role of an alternative for the
future generation of electronic circuits and electromagnetic systems. Despite the
vast number of research effort devoted to the study of the SSP modes, a deep
theoretical study and a reliable and repeatable modeling for the SSP structures are
strongly demanded for engineering applications. Here, we tackle the quest by
elaborating the basic requirements for the implementation of the SSP modes in
microwave circuits to enable the SSP-based circuit component designs.
For the SSP-based transmission systems, the equivalent circuit models for the
electromagnetic structures are important for the analysis and the design of their
characteristics. This thesis first proposes the equivalent circuit models for the
accuratecharacterizationoftheSSPstructures,servingasaninsightfulguidelineto
design the SSP-based circuits.
ToefficientlyexcitetheSSPmodes,itisnecessarytocoupletheSSPstructures
to the guiding mode-based microwave sources and the conventional transmission
lines (conventional TLs) through a transition. Here, a new type of efficient transi-
tionsisdevelopedfortheconnectionoftheSSPstructurestotheconventionalTLs
in order to form slow-wave transmission lines (SW-TLs). The simulation and
experiments have verified that the proposed SW-TL achieves as low as half of the
ohmicloss oftheconventional counterparts. Moreover,thelow crosstalk between
the proposed SW-TLs is numerically and experimentally substantiated to be up to
one order of magnitude lower than that between the conventional microstrip TLs.
For the antenna feeding systems, the presence of the ground plane impedes the
proper operation of the antenna and distorts their desired radiation performance.
This thesis tackles this challenge and proposes a new method based on the
SSP-based structure to remove the unwanted effect of the ground plane in the
antenna systems. As an example, a cylindrical dielectric resonator antenna excited
v
vi Supervisor’sForeword
to operate at the otherwise unavailable TE dominant modes. The simulation and
measurementhaveevidencedtheuniquefeaturesofprohibitedTE01dmodesuchas
thelowerthicknessdependencyoftheresonantfrequencies,ultra-compactness,and
horizontally polarized omnidirectional radiation pattern.
In addition to non-radiative transmission lines, the SSP structures have a great
potentialtoformhighlyefficientantennas.Thisthesisappliesthesemodestosolve
one of the persistent challenges in traveling wave antennas. These antennas are
highly demanded for frequency scanning imaging systems, although they are suf-
fering from the inconsistent performance over their wideband frequency response.
Here, a single-layered leaky-wave antenna (SL-LWA) using a meander SSP struc-
tureisproposedandprovedtoprovideaconsistentgainvariationlessthan2.5dBof
scanningbeams within the 80%fractional frequency bandwidth.
In summary, the concept of the SSP has opened a new field for guided and
radiative systems in electronic systems. The work is at the early stage of research
anddevelopment.Withdeeperanddeeperstudy,wecanexpectthemoreandmore
applications of SSP-based structures in electronic systems in future.
Singapore Prof. Zhi Ning Chen
January 2018
Parts of the thesis have been published in the following journal articles:
1. A. Kianinejad, Z. N. Chen, and C.-W. Qiu, “Design and modeling of spoof
surface plasmon modes-based microwave slow-wave transmission line,” IEEE
Trans. Microw. Theory Tech., vol. 63, no. 6, pp. 1817–1825, Jun. 2015.
2. A. Kianinejad, Z. N. Chen, L. Zhang, W. Liu, and C. W. Qiu, “Spoof
plasmon-based Slow-wave excitation of dielectric resonator antennas,” IEEE
Trans. Antennas Propag., vol. 64, no. 6, pp. 2094–2099, Jun. 2016.
3. A. Kianinejad, Z. N. Chen, and C. W. Qiu, “Low-loss spoof surface plasmon
slow-wavetransmissionlineswithcompacttransitionandhighisolation,”IEEE
Trans. Microw. Theory Tech., vol. 64, no. 10, pp. 3078–3086, Oct. 2016.
4. A. Kianinejad, Z. N. Chen, and C. W. Qiu, “A single-layered
spoof-plasmon-mode leaky wave antenna with consistent gain,” IEEE Trans.
Antennas Propagat., vol. 65, no. 2, pp. 681–687, Feb. 2017.
5. A. Kianinejad, Z. N. Chen, and C.-W. Qiu, “Modeling and implementation of
meanderspoofplasmonmodesfordesignofhighlytunabletransmissionlines,”
to be submitted.
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Acknowledgements
Firstly, Iwould liketoexpressmysincere gratitude tomyadvisorsProf.ZhiNing
ChenandProf.Cheng-WeiQiufortheircontinuoussupportofmyPh.D.studyand
related research, for their patience, motivation, and immense knowledge. Their
guidance helped me in all the time of research and writing of this thesis.
Besides my advisor, I would like to thank the rest of my thesis advisory com-
mittee:Prof.TatSoonYeo,Prof.XudongChen,andProf.MinghuiHong,fortheir
insightfulcommentsandencouragement,andforthehardquestion whichincented
me to widen my research from various perspectives.
Special thanks to my family. Words cannot express how grateful I am to my
mother,Nasrin,myfather,Abodlrahim,andmybrothers,ImanandMohammad,for
all of the sacrifices that they’ve made on my behalf. Their prayer for me was what
sustained me thus far. I would also like to thank all of my friends in the MMIC
Modelling and Packaging Laboratory, specially Wei Liu, Srien Sithara, Andong
Huang, Yuanyan Su, and Ashraf Adam Salih who supported me in writing and
incentedmetostrivetowardmygoal. I wouldalsoliketothank myfriends outside
NUS, specially SajjadSeifozzakerini,Hossein DehghaniTafti,MohammadDanesh,
and Rasool Maghareh, who made the journey more rewarding and enjoyable.
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Declaration
I, Amin Kianinejad, declare that the thesis submitted is my own original work.
Ideclarethatthethesiscontainsresearchreportedinco-authoredworkthathasbeen
published, accepted for publication, or submitted for publication. I declare that the
thesis does not contain material which has been accepted, or submitted, for any
other degree or diploma at a university or other institution of higher learning.
January 2017
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