A 3D-printed sub-terahertz metallic surface-wave Luneburg lens multi-beam antenna

Boyu Nie, Hongda Lu*, Talal Skaik, Yi Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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This letter presents an experimental realization of a sub-terahertz metallic gradient index (GRIN) lens multi-beam antenna operating at 355 GHz. The antenna is composed of a surface-wave Luneburg lens based on a bed of nails and a feeder array of nine WR-2.2 waveguides. The lens and the feeding structures are fabricated by the same high-precision 3D printing technique and are metalized using magnetron-sputtering gold coating. The antenna has been measured, showing good reflection coefficients below -12.5 dB at all ports and multiple independent beams covering a range of ±60°, which agree very well with the simulation. The measured gains are above 16 dBi and the scan loss is below 1.2 dB. This work demonstrates a novel manufacture and implementation approach for metallic multi-beam lens antennas at sub-terahertz frequencies.
Original languageEnglish
Article number10036101
Pages (from-to)1-6
Number of pages6
JournalIEEE Transactions on Terahertz Science and Technology
Publication statusPublished - 3 Feb 2023


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