TY - JOUR
T1 - Radially Polarized Annular-Slot Leaky-Wave Antenna for Three-Dimensional Near-Field Microwave Focusing
AU - Blanco, Darwin
AU - Gómez-Tornero, Jose Luis
AU - Rajo-Iglesias, Eva
AU - Llombart Juan, Nuria
PY - 2014
Y1 - 2014
N2 - Microwave three-dimensional near-field focusing with radial polarization using a holographic annular-slot antenna is demonstrated in this letter. This radial polarization can generate axially polarized focused fields in the near-field regime, which complements the more conventional synthesis of transversally polarized near-field focusing patterns. Moreover, it is shown that more symmetrical focal region is obtained thanks to the radial polarization for similar Fresnel number N and operation frequency. The theory is demonstrated with experiments for a design operating at 10 GHz, with aperture diameter D=6λ and a Fresnel number N=4.
AB - Microwave three-dimensional near-field focusing with radial polarization using a holographic annular-slot antenna is demonstrated in this letter. This radial polarization can generate axially polarized focused fields in the near-field regime, which complements the more conventional synthesis of transversally polarized near-field focusing patterns. Moreover, it is shown that more symmetrical focal region is obtained thanks to the radial polarization for similar Fresnel number N and operation frequency. The theory is demonstrated with experiments for a design operating at 10 GHz, with aperture diameter D=6λ and a Fresnel number N=4.
KW - Focal depth
KW - leaky-wave antennas
KW - three-dimensional near-field focused microwave antennas
UR - http://www.scopus.com/inward/record.url?scp=84898682311&partnerID=8YFLogxK
U2 - 10.1109/LAWP.2014.2311854
DO - 10.1109/LAWP.2014.2311854
M3 - Article
AN - SCOPUS:84898682311
SN - 1536-1225
VL - 13
SP - 583
EP - 586
JO - IEEE Antennas and Wireless Propagation Letters
JF - IEEE Antennas and Wireless Propagation Letters
M1 - 6767070
ER -