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Monofilar Spiral Slot Antenna for Dual-Frequency Dual-Sense Circular Polarization
Bao, Xiulong; Ammann, Max
A dual-band antenna with right-hand circular polarization for the first frequency and the counter polarization at the second frequency is realized with compact printed spiral slots. The coupled spiral slots are fed by a 50 Ω microstrip line. Dual-sense circularly-polarized performance is achieved by realizing oppositely-directed current rotation for the two frequency bands. A parametric study shows that the additional slot significantly improves the bandwidth for both frequency bands. Measured results show that the fractional impedance bandwidth is greater than 18% for both bands. The 3 dB axial-ratio bandwidths are 4.5% and 3.5% for the RHCP and LHCP bands, respectively.
Keyword(s): monofilar; slot; antenna; dual-frequency; dual-circulation; Systems and Communications
Publication Date:
2011
Type: Other
Peer-Reviewed: Unknown
Contributor(s): Science Foundation Ireland
Institution: Dublin Institute of Technology
Citation(s): Articles
Publisher(s): Dublin Institute of Technology
File Format(s): application/pdf
First Indexed: 2012-04-17 05:50:24 Last Updated: 2017-12-14 07:09:02