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Compact dual-band circularly polarized patch antenna with bandwidth enhancement

THEAN SONG OOI1,* , S.K.A.RAHIM2, A. Y. ABDULRAHMAN1, BOON PING KOH1, SIN KENG LEE1

Affiliation

  1. Enterprise Mobility Solutions, Motorola Solutions Malaysia Sdn Bhd. Pulau Pinang, Malaysia
  2. Wireless Communication Centre, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia

Abstract

This paper introduces a bandwidth enhanced version of dual-band circularly polarized stacked microstrip antenna for ISM Bands (2.45GHz & 5.8GHz) applications. The aim is to reduce the limitation of patch antenna which is narrowband. Implementing two frequencies on a single antenna with circular polarization can be significant because of the presence of mutual coupling and interference effect between the two radiating elements. With the enhanced bandwidth the application area of the proposed antenna is further widened. The stacking antenna with two different corner-truncated square patches, had achieved dual-frequency circular polarization (CP) with 9.1% and 26.2% measured impedance bandwidth at VSWR of 2.5:1. The obtained results show that the proposed dual band CP antenna achieves high antenna efficiency and provides better bandwidths, while still maintaining the structural compact size. The antenna is therefore a promising candidate for smart antenna systems, cognitive radios, and radar applications in the future..

Keywords

Patch Antenna, Circular Polarized, Dual Bands, ISM Band, Bandwidth enhancement..

Submitted at: Aug. 23, 2011
Accepted at: Oct. 20, 2011

Citation

THEAN SONG OOI, S.K.A.RAHIM, A. Y. ABDULRAHMAN, BOON PING KOH, SIN KENG LEE, Compact dual-band circularly polarized patch antenna with bandwidth enhancement, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 10, pp. 1279-1284 (2011)