Slotted microstrip antennas for circular polarization with compact size

Nasimuddin, Zhi Ning Chen, Xianming Qing

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Circularly polarized diagonally symmetric slotted microstrip-patch antennas are proposed with compact size. The compact circularly polarized (CP) diagonally symmetric slotted microstrip-patch (DSSMP) antenna design rules are also summarized. Circularly polarized radiation can be achieved using any arbitrarily shaped slots in diagonal directions on the square microstrip-patch antenna. Different shapes for the slots are studied and compared, based on the fixed overall volume of the antenna for circularly polarized diagonally symmetric slotted microstrip-patch antennas. The crossshaped-slot diagonally symmetric slotted microstrip-patch antenna is compact when compared with the circular-, square-, and circular-ring-shaped diagonally symmetric slotted microstrip-patch antennas. A measured 3 dB axial-ratio (AR) bandwidth of around 0.7% (6.0 MHz) with 2.0% (18.0 MHz) impedance bandwidth was achieved. The measured boresight gain was more than 3.3 dBic over the operating band, while the overall antenna size was 0.272λ0×0. 272λ0×0.0138λ0 at 0.905 GHz.

Original languageEnglish
Article number6529322
Pages (from-to)124-137
Number of pages14
JournalIEEE Antennas and Propagation Magazine
Volume55
Issue number2
DOIs
Publication statusPublished - Apr 2013
Externally publishedYes

Keywords

  • Circularly polarized antennas
  • Compact antennas
  • Microstrip antenna
  • Slots
  • Slotted microstrip antennas
  • Square patch

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