期刊
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
卷 8, 期 -, 页码 295-298出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2008.2010722
关键词
Compact antennas; meandered line inductor; metamaterials; spiral inductor
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
A wideband and compact planar antenna is proposed using a doubly resonant transmission-line metamaterial (TL-MTM) structure. The antenna consists of two TL-MTM arms that resonate at different frequencies. Each arm comprises a microstrip transmission-line loaded with five spiral inductors and is well matched to 50 through an embedded series meandered line. Each arm is designed to work as a single antenna at its own resonant frequency, determined by the loading spiral inductance, where a zero insertion phase occurs. A wideband antenna matching is enabled when these two resonances suitably merge together. A fabricated prototype has dimensions of lambda(o)/4 x lambda(o)/7 x lambda(o)/29, yielding a vertical linear electric field polarization, and provides a 100-MHz bandwidth (- 10 dB) with a measured radiation efficiency of 65.8% at 3.30 GHz.
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