摘要
This letter presents an experimental realization of a subterahertz metallic gradient index (GRIN) lens multibeam 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 multibeam lens antennas at subterahertz frequencies.
| 源语言 | 英语 |
|---|---|
| 页（从-至） | 297-301 |
| 页数 | 5 |
| 期刊 | IEEE Transactions on Terahertz Science and Technology |
| 卷 | 13 |
| 期 | 3 |
| DOI | |
| 出版状态 | 已出版 - 1 5月 2023 |