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Bandwidth enhancement of epsilon negative zeroth‐order resonator antennas using a Co 2 Y hexagonal ferrite helical loading
Author(s) -
Ji Jeong Keun,
Kim Gi Ho,
Seong Won Mo
Publication year - 2011
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.25650
Subject(s) - microwave , ferrite (magnet) , resonator , materials science , hexagonal crystal system , planar , ferrite core , electrical engineering , optoelectronics , engineering , electromagnetic coil , composite material , telecommunications , chemistry , computer science , crystallography , computer graphics (images)
A method to extend the bandwidth of epsilon negative (ENG) zeroth‐order resonator (ZOR) antennas using a Co 2 Y hexagonal ferrite (Ba 2 Co 1 Zn 0.7 Cu 0.3 Fe 12 O 22 ) is presented.It is accomplished by using the ferrite helical loading for shunt inductance of ENG ZOR unit cell. The Co 2 Y hexagonal ferrite has been developed for performance improvement of mobile handset antennas. The permittivity of the developed Co 2 Y hexagonal ferrite is about 9.3, and the permeability is about 4. An ENG ZOR antenna based on simplified planar mushroom structure unit cell was fabricated, and bandwidth enhancement and good radiation performance were achieved. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:87–90, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25650