Electrically small antenna with frequency tuning circuit for wideband applications

Ick Jae Yoon, Se Hyun Park, Youngeil Kim, Young Joong Yoon

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This study proposes the concept of frequency tuning for an electrically small antenna to be used in wideband applications in low frequencies. An electrically small antenna has too narrow bandwidth to be utilized for wideband systems. However, in such mobile TV services that the band is composed of each sub channel in VHF band, the narrow bandwidth can be appropriately utilized with wideband frequency tuning. That is, each service channel is covered by the narrow resonant band of a small sized radiator and the entire service band is satisfied by moving its frequency. To prove the idea of this study, a small helical antenna with the size of less than λ/10 is chosen as a sample and the T-DMB senice, a kind of the mobile TV services allocated to 200-MHz band, is selected for testing. With the designed tuning circuit constituted of lumped elements and a varactor. a low impedance of the small radiator is matched to about 50 Ω and the wide bandwidth is satisfied by moving its narrow resonant frequency. The validity of the proposed antenna is also proved by the receiving measured result.

Original languageEnglish
Pages (from-to)244-247
Number of pages4
JournalMicrowave and Optical Technology Letters
Volume50
Issue number1
DOIs
Publication statusPublished - 2008 Jan 1

Fingerprint

antennas
Tuning
tuning
Radiators
Antennas
broadband
Bandwidth
Networks (circuits)
Helical antennas
radiators
bandwidth
Varactors
helical antennas
Natural frequencies
varactor diodes
Testing
resonant frequencies
impedance
low frequencies

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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Electrically small antenna with frequency tuning circuit for wideband applications. / Yoon, Ick Jae; Park, Se Hyun; Kim, Youngeil; Yoon, Young Joong.

In: Microwave and Optical Technology Letters, Vol. 50, No. 1, 01.01.2008, p. 244-247.

Research output: Contribution to journalArticle

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