Performance enhancement of small antennas and applications in RFID: Dissertation

Research output: ThesisDissertation

Abstract

The focus of this thesis is on the performance enhancement of small antennas and design and verification of antennas for radio frequency identification (RFID) and wireless sensors. The work is presented in eight scientific papers and in a summary, which introduces relevant fundamental concepts and previous work done in the field of small antennas. Previously, several performance enhancement methods have been proposed to improve the antenna performance especially in mobile communication applications. However, solutions for the fundamental small antenna problem, high reactive energy and low radiation resistance, which in practice lead to narrowband and low efficiency operation, are rarely provided. In this thesis, alternative methods to alleviate the high reactive energy and low radiation resistance like material loading, non-Foster tuning and multi-port loading are discussed. Also, lately antennas for RFID and wireless sensor applications have gained growing interest. However, several characteristic design features exist for these antennas. Especially, the concept of platform insensitivity is essential and discussed in detail. Also, antenna designs and dual-band tuning technique applicable to RFID antennas are presented. In addition, wireless measurement techniques for RFID antenna verification are reported.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • Aalto University
Supervisors/Advisors
  • Tretyakov, Sergei, Supervisor, External person
Award date7 Oct 2008
Place of PublicationEspoo
Publisher
Print ISBNs978-951-38-7108-6
Electronic ISBNs978-951-38-7109-3
Publication statusPublished - 2008
MoE publication typeG5 Doctoral dissertation (article)

Fingerprint

Radio frequency identification (RFID)
Antennas
Tuning
Radiation
Sensors
Communication

Keywords

  • small antennas
  • RFID
  • wireless sensors
  • quality factor
  • near-zero permittivity
  • non-Foster tuning
  • multi-port antennas
  • platform insensitivity
  • dual-band
  • backscattering
  • measurement

Cite this

Hirvonen, Mervi. / Performance enhancement of small antennas and applications in RFID : Dissertation. Espoo : VTT Technical Research Centre of Finland, 2008. 99 p.
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title = "Performance enhancement of small antennas and applications in RFID: Dissertation",
abstract = "The focus of this thesis is on the performance enhancement of small antennas and design and verification of antennas for radio frequency identification (RFID) and wireless sensors. The work is presented in eight scientific papers and in a summary, which introduces relevant fundamental concepts and previous work done in the field of small antennas. Previously, several performance enhancement methods have been proposed to improve the antenna performance especially in mobile communication applications. However, solutions for the fundamental small antenna problem, high reactive energy and low radiation resistance, which in practice lead to narrowband and low efficiency operation, are rarely provided. In this thesis, alternative methods to alleviate the high reactive energy and low radiation resistance like material loading, non-Foster tuning and multi-port loading are discussed. Also, lately antennas for RFID and wireless sensor applications have gained growing interest. However, several characteristic design features exist for these antennas. Especially, the concept of platform insensitivity is essential and discussed in detail. Also, antenna designs and dual-band tuning technique applicable to RFID antennas are presented. In addition, wireless measurement techniques for RFID antenna verification are reported.",
keywords = "small antennas, RFID, wireless sensors, quality factor, near-zero permittivity, non-Foster tuning, multi-port antennas, platform insensitivity, dual-band, backscattering, measurement",
author = "Mervi Hirvonen",
year = "2008",
language = "English",
isbn = "978-951-38-7108-6",
series = "VTT Publications",
publisher = "VTT Technical Research Centre of Finland",
number = "688",
address = "Finland",
school = "Aalto University",

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Performance enhancement of small antennas and applications in RFID : Dissertation. / Hirvonen, Mervi.

Espoo : VTT Technical Research Centre of Finland, 2008. 99 p.

Research output: ThesisDissertation

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T1 - Performance enhancement of small antennas and applications in RFID

T2 - Dissertation

AU - Hirvonen, Mervi

PY - 2008

Y1 - 2008

N2 - The focus of this thesis is on the performance enhancement of small antennas and design and verification of antennas for radio frequency identification (RFID) and wireless sensors. The work is presented in eight scientific papers and in a summary, which introduces relevant fundamental concepts and previous work done in the field of small antennas. Previously, several performance enhancement methods have been proposed to improve the antenna performance especially in mobile communication applications. However, solutions for the fundamental small antenna problem, high reactive energy and low radiation resistance, which in practice lead to narrowband and low efficiency operation, are rarely provided. In this thesis, alternative methods to alleviate the high reactive energy and low radiation resistance like material loading, non-Foster tuning and multi-port loading are discussed. Also, lately antennas for RFID and wireless sensor applications have gained growing interest. However, several characteristic design features exist for these antennas. Especially, the concept of platform insensitivity is essential and discussed in detail. Also, antenna designs and dual-band tuning technique applicable to RFID antennas are presented. In addition, wireless measurement techniques for RFID antenna verification are reported.

AB - The focus of this thesis is on the performance enhancement of small antennas and design and verification of antennas for radio frequency identification (RFID) and wireless sensors. The work is presented in eight scientific papers and in a summary, which introduces relevant fundamental concepts and previous work done in the field of small antennas. Previously, several performance enhancement methods have been proposed to improve the antenna performance especially in mobile communication applications. However, solutions for the fundamental small antenna problem, high reactive energy and low radiation resistance, which in practice lead to narrowband and low efficiency operation, are rarely provided. In this thesis, alternative methods to alleviate the high reactive energy and low radiation resistance like material loading, non-Foster tuning and multi-port loading are discussed. Also, lately antennas for RFID and wireless sensor applications have gained growing interest. However, several characteristic design features exist for these antennas. Especially, the concept of platform insensitivity is essential and discussed in detail. Also, antenna designs and dual-band tuning technique applicable to RFID antennas are presented. In addition, wireless measurement techniques for RFID antenna verification are reported.

KW - small antennas

KW - RFID

KW - wireless sensors

KW - quality factor

KW - near-zero permittivity

KW - non-Foster tuning

KW - multi-port antennas

KW - platform insensitivity

KW - dual-band

KW - backscattering

KW - measurement

M3 - Dissertation

SN - 978-951-38-7108-6

T3 - VTT Publications

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Hirvonen M. Performance enhancement of small antennas and applications in RFID: Dissertation. Espoo: VTT Technical Research Centre of Finland, 2008. 99 p.