High Gain and Low-Profile Stacked Magneto-Electric Dipole Antenna for Phased Array Beamforming

High Gain and Low-Profile Stacked Magneto-Electric Dipole Antenna for Phased Array Beamforming

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A high gain stacked antenna based on a planar magneto-electric dipole structure is proposed.The main radiator is configured by a probe-fed patch with a symmetrically arranged pair of dipole radiation elements.Further, an additional air-gapped radiator with multiple patch elements is integrated for gain enhancement.

Since both the main and stacked radiators are planar structures, the overall volume can remain low-profile regardless of the airgap.To verify the performance of the proposed structure, a single magneto-electric dipole antenna and three different types of stacked radiators were implemented at 5.8 GHz.

The magneto-electric dipole antenna showed measured 10-dB Patio Dining Package impedance bandwidth and gain of 5.2% and 8.0 dBi, respectively with the overall size of 0.

96 λ0 × 0.96 λ0 including a ground plane.With the additional stacked radiator having the Travel Blanket airgap of 0.

1 λ0, the maximum measured gain was increased to 9.6 dBi.Further, to verify the beamforming performances, three types of 1×8 phased array stacked structures were fabricated with a volume of 0.

96 λ0 × 6.38 λ0 × 0.14 λ0 at 5.

8 GHz.The measurements showed a maximum peak gain of 18.1 dBi and a half-power-beamwidth scan angle of 49° with a side-lobe level less than -8 dB.