Accordion shape monofilar axial mode helix for RFID reader

An accordion shape monofilar axial mode helical antenna designed by curving the helix along the axis is proposed. This antenna achieves a low-profile characteristic as the 10-turn helix's axial length is 0.354. The impedance bandwidth (SWR < 1.5) is 9% from the frequency of 880 to 963MHz and...

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Veröffentlicht in:	Electronics letters 2006-05, Vol.42 (11), p.607-608
Hauptverfasser:	LAU, P. Y, WONG, H, YUNG, E. K. N
Format:	Artikel
Sprache:	eng
Schlagworte:	Antennas Applied sciences Exact sciences and technology Radiocommunications Radiolocalization and radionavigation Telecommunications Telecommunications and information theory
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	An accordion shape monofilar axial mode helical antenna designed by curving the helix along the axis is proposed. This antenna achieves a low-profile characteristic as the 10-turn helix's axial length is 0.354. The impedance bandwidth (SWR < 1.5) is 9% from the frequency of 880 to 963MHz and the axial ratio bandwidth (AR < 3dB) is 6.5%. The measured gain is 10.2dBi. This antenna operated at the centre frequency of 915MHz and has a tilted radiation of 17 deg to the curving side.
ISSN:	0013-5194 1350-911X
DOI:	10.1049/el:20060398