3-D Printed Zirconia Ceramic Archimedean Spiral Antenna: Theory and Performance in Comparison With Its Metal Counterpart

Impedance matching for curl and truncated spiral antennas above the ground plane

“…The findings are as follows: The present curl's bandwidth is similar to a stacked curl's [9]. Note that the stacked and staircase [10] curls no longer have a planar arm like the present curl, resulting in a complicated antenna configuration. The present spiral's bandwidth is comparable to that for double feeds [13], even for a single one. Note that a balun circuit on the market can lead to the widest bandwidth.…”

“…The present spiral's bandwidth is comparable to that for double feeds [13], even for a single one. Note that a balun circuit on the market can lead to the widest bandwidth.…”

Monolithically Integrated Coaxial Resonator-Based Filtennas Using SLA Three-Dimensional Printing

“…Metal-based AM process such as direct metal laser sintering (DMLS) [7] or selective laser melting (SLM) [8], [9] offers high mechanical robustness, but with relatively higher cost and low surface roughness. Ceramic based-or plastic/resin based-AM process [10] [11]- [17], PolyJet [18], and stereolithography apparatus (SLA) [19]- [21] exhibit significantly lower cost and weight. However, due the need for internal metallization they can only be implemented as split-block.…”

Compact High‐Gain Volumetric Phased Array Antenna with Genetically Designed Interelement Resonances for 5G Applications

“…However, advances in additive manufacturing, especially 3D printing, open new opportunities in antenna design. Computer numerical control milling, [24,25] laser direct structuring, [26][27][28] conformal printing of metallic inks, [29,30] ultrasonic wire mesh embedding, [31] stereolithography (SLA) of dielectric antennas, [32,33] and metal deposition through a mask on curved surfaces [34,35] are among the demonstrated additive manufacturing methods aimed at providing high-quality RF components. [36] Here, we propose a compact directive antenna, whose design encompasses approaches of classical phased arrays and multipole engineering to obtain directive emission with a single volumetric element.…”