A 3D printed metallized Fabry–Perot cavity antenna with improved bandwidth and low side‐lobe levels

A 3D printed metallized Fabry–Perot cavity antenna with improved bandwidth and low side‐lobe levels

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Abstract A 3D printed Kilts metallized Fabry–Perot cavity antenna centred at 5.8 GHz is presented in this letter.A non‐uniform grid superstrate and a choke groove are employed in the Fabry–Perot cavity antenna to improve the input bandwidth and decrease the side lobes.By using the non‐uniform superstrate, the |S11| ← 10 dB bandwidth is enhanced to approximately 6.

4% (from 5.65 to 6.02 GHz).The side lobes decrease to −14.

03 and −21.62 dB on E and H planes by the choke groove.The designed antenna is fabricated by Foundations using a stereolithography‐based 3D printing technique for verification, whose weight is only 13% of the one fabricated with copper.The measured result agrees well with the simulated one.