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Abstract
A novel combined beam antenna for 5G communications using a 28-GHz frequency band is proposed, which provides a tilted radiation on an elevation plane. Instead of applying a conventional array technique to produce a scanned beam, two different radiating elements have been combined in order to obtain a relatively wide beam but high gain in a tilted target direction. There are two main radiators; one is a group of microstrip patches, and the other is a waveguide aperture. The patches produce two split strong beams on the azimuth plane. The aperture further increases antenna gain on the elevation plane. Finally, by optimizing the constructive interference between the patches and the aperture, we can obtain relatively high antenna gain even with a wide beam spreading across an azimuthal plane. All experiments show good agreement with the simulation results, which proves the validity of our approach.
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