Abstract
In this letter, a novel low-profile magnetoelectric (ME) dipole antenna is proposed. By utilizing a pair of vertically oriented folded shorted patches, the antenna height is reduced from 0.25λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> to 0.116λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> compared with the original ME dipole antenna (λ 0 is the center-frequency free-space wavelength). A fully functional prototype is constructed and tested. The measurement shows that a fractional impedance bandwidth (S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> ≤ -10 dB) of 43.6% from 1.81 to 2.82 GHz is achieved. Within the operating frequency, the antenna gain is stable located at 9 dBi. Besides, stable unidirectional radiation patterns in both E- and H-planes with high front-to-back ratio are obtained. Due to the dc grounded property, the antenna can be applied outdoors.
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