Broadband circularly polarized crossed dipole with parasitic loop resonators and its arrays

Jung Woo Baik, Tae Hak Lee, Seongmin Pyo, Sang Min Han, Jichai Jeong, Young Sik Kim

Research output: Contribution to journalArticlepeer-review

176 Citations (Scopus)


A novel printed crossed dipole with broad axial ratio (AR) bandwidth is proposed. The proposed dipole consists of two dipoles crossed through a 90° phase delay line, which produces one minimum AR point due to the sequentially rotated configuration and four parasitic loops, which generate one additional minimum AR point. By combining these two minimum AR points, the proposed dipole achieves a broadband circularly polarized (CP) performance. The proposed antenna has not only a broad 3 dB AR bandwidth of 28.6% (0.75 GHz, 2.253.0 GHz) with respect to the CP center frequency 2.625 GHz, but also a broad impedance bandwidth for a voltage standing wave ratio (VSWR) ≤q2 of 38.2% (0.93 GHz, 1.972.9 GHz) centered at 2.435 GHz and a peak CP gain of 8.34 dBic. Its arrays of 1 × 2 and 2 × 2 arrangement yield 3 dB AR bandwidths of 50.7% (1.36 GHz, 23.36 GHz) with respect to the CP center frequency, 2.68 GHz, and 56.4% (1.53 GHz, 1.953.48 GHz) at the CP center frequency, 2.715 GHz, respectively. This paper deals with the designs and experimental results of the proposed crossed dipole with parasitic loop resonators and its arrays.

Original languageEnglish
Article number5617237
Pages (from-to)80-88
Number of pages9
JournalIEEE Transactions on Antennas and Propagation
Issue number1
Publication statusPublished - 2011 Jan

Bibliographical note

Funding Information:
Manuscript received October 29, 2009; revised April 26, 2010; accepted July 31, 2010. Date of publication November 01, 2010; date of current version January 04, 2011. This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government [NRF-2009-352-D00224].


  • Broad axial ratio bandwidth
  • circularly polarized dipole
  • crossed dipole
  • dipole array

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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