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A Magneto-Electric Dipole Antenna With Low-Profile and Simple Structure

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2 Author(s)
Lei Ge ; Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China ; Kwai Man Luk

By combining a horizontal planar dipole and a vertically oriented folded shorted patch antenna, a new low-profile magneto-electric dipole antenna is presented. The antenna is simply excited by a coaxial feed that works as a balun. A prototype was fabricated and measured. Simulated and measured results agree well. An impedance bandwidth of 45.6% for SWR ≤ 1.5 from 1.86 to 2.96 GHz was achieved. Stable radiation pattern with low cross polarization, low back radiation, and an antenna gain of 8.1 ± 0.8 dBi was found over the operating frequencies. The height of the antenna is only 0.169λ (where λ is the free-space wavelength at the center frequency). In addition, the antenna is dc grounded, which satisfies the requirement of many outdoor antennas.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:12 )