Multiband Antenna Based on Meta-Structured Transmission Line for RF Harvesting Application

Kwi Seob UM  Jae-Gon LEE  Jeong-Hae LEE  

Publication
IEICE TRANSACTIONS on Communications   Vol.E101-B   No.7   pp.1701-1707
Publication Date: 2018/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017EBP3346
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
penta-band,  mu-negative (MNG) transmission line,  equivalent circuit,  RF energy harvesting,  

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Summary: 
A penta-band antenna based on the mu-negative transmission line is presented for radio frequency (RF) energy harvesting application. The antenna utilizes five radiation modes; two quarter wavelength resonances, three quarter wavelength resonance, zeroth order resonance, and first order resonance. The parasitic radiating strip antenna generates quarter wavelength resonance radiation. The dual band antenna based on two unit cell mu-negative (MNG) transmission line gives birth to the zeroth order resonance (ZOR) mode and the first order resonance (FOR) mode. The parasitic radiating strip and dual band antenna based on two unit mu-negative (MNG) transmission line are magnetically coupled by a feed monopole with gap. This feed monopole, simultaneously, radiates at quarter and three quarter wavelength resonance frequency to cover the other bands. The multi-mode coupling mechanism of this penta-band antenna is well modeled by our derived equivalent circuit. The measured radiation efficiencies are more than 87% over the entire penta-band.