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Journal Article Broadband Circularly Polarized Crossed Dipole With Parasitic Loop Resonators and Its Arrays
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Authors
Jung-Woo Baik, Tae-Hak Lee, Seongmin Pyo, Sang-Min Han, Jichai Jeong, Young-Sik Kim
Issue Date
2011-01
Citation
IEEE Transactions on Antennas and Propagation, v.59, no.1, pp.80-88
ISSN
0018-926X
Publisher
IEEE
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1109/TAP.2010.2090463
Project Code
10MR3500, Study of technologies for improving the RF spectrum characteristics by using the meta-electromagnetic structure, Choi Jae Ick
Abstract
A novel printed crossed dipole with broad axial ratio (AR) bandwidth is proposed. The proposed dipole consists of two dipoles crossed through a 90째 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) ?돞q2 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. © 2006 IEEE.
KSP Keywords
15 GHz, 3.5 GHz, 6 GHz, Center frequency, Circularly polarized, Loop resonator, Parasitic loop, Voltage Standing Wave Ratio(VSWR), axial ratio (AR) bandwidth, crossed dipoles, delay line