A Horizontally polarized rectangular stepped slot antenna for ultra wide bandwidth with boresight radiation patterns

Raj Kumar, Rajas K. Khokle, R. V. S. Ram Krishna

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

In this paper, a horizontally polarized UWB antenna is proposed. The UWB nature of the antenna is achieved using a stepped impedance microstrip feed line to excite the stepped slot configuration. The -10 dB experimental impedance bandwidth acquired from VNA is 10 GHz (from 3.2 GHz to 13.2 GHz) which is 122% at the center frequency of 8.2 GHz. Symmetric feeding of the slot ensures good polarization characteristics and uniform radiation patterns throughout the operating band. The measured co to cross polarization ratio in boresight direction is around 15 dBi over most of the frequencies while the average peak gain is around 5 dBi. With the help of parametric studies, the choice of the antenna dimensions is justified. Finally, a modified design with band-notch characteristics to suppress interference from 5 GHz WLAN systems is presented. The simulated and measured results are in good agreement.

Original languageEnglish
Article number6808515
Pages (from-to)3501-3510
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Volume62
Issue number7
DOIs
Publication statusPublished - Jul 2014
Externally publishedYes

Keywords

  • horizontal polarization
  • slot antennas
  • ultra wideband antennas

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