A compact circularly polarized cross-shaped slotted microstrip antenna

Nasimuddin*, Zhi Ning Chen, Xianming Qing

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

136 Citations (Scopus)


A compact cross-shaped slotted microstrip patch antenna is proposed for circularly polarized (CP) radiation. A symmetric, cross- shaped slot is embedded along one of the diagonal axes of the square patch for CP radiation and antenna size reduction. The structure is asymmetric (unbalanced) along the diagonal axes. The overall size of the antenna with CP radiation can be reduced by increasing the perimeter of the symmetric cross-shaped slot within the first patch quadrant of the square patch. The performance of the CP radiation is also studied by varying the size and angle variation of the cross-shaped slot. A measured 3-dB axial-ratio (AR) bandwidth of around 6.0 MHz is achieved with the CP cross-shaped slotted microstrip antenna, with an 18.0 MHz 10-dB return-loss bandwidth. The measured boresight gain is more than 3.8 dBic over the operating band, while the overall antenna volume is 0.273λ o × 0.273λ o × 0.013λ oo operating wavelength at 910 MHz).

Original languageEnglish
Article number6107544
Pages (from-to)1584-1588
Number of pages5
JournalIEEE Transactions on Antennas and Propagation
Issue number3
Publication statusPublished - Mar 2012
Externally publishedYes


  • Circular polarization
  • circularly polarized microstrip antenna
  • microstrip antenna
  • slotted patch


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