Journal
ELECTRONICS
Volume 11, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/electronics11010064
Keywords
DRA; additive manufacturing; 3D-printed antennas; wideband; IoT; 5G
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3D-printed antennas, especially dielectric resonator antennas (DRAs), have shown great potential in terms of excellent performance and compact size. With the use of additive manufacturing technologies, it is possible to achieve compact size and good performance.
One of the most promising and exciting research fields of the last decade is that of 3D-printed antennas, as proven by the increasing number of related scientific papers. More specifically, the most common and cost-effective 3D printing technologies, which have become more and more widespread in recent years, are particularly suitable for the development of dielectric resonator antennas (DRAs), which are very interesting types of antennas exhibiting good gain, excellent efficiency, and potentially very small size. After a brief survey on how additive manufacturing (AM) can be used in 3D printing of antennas and how much the manufacturing process of DRAs can benefit from those technologies, a specific example, consisting of a wideband antenna operating at 2.4 GHz and 3.8 GHz, was deeply analyzed, realized, and tested. The obtained prototype exhibited compact size (60 x 60 x 16 mm(3), considering the whole antenna) and a good agreement between measured and simulated S-11, with a fractional bandwidth of 46%. Simulated gain and efficiency were also quite good, with values of 5.45 dBi and 6.38 dBi for the gain and 91% and 90% for the efficiency, respectively, at 2.45 GHz and 3.6 GHz.
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