Abstract
In this communication, a ridged waveguide (RWG) slot antenna array based on micro-coaxial line (CL) Butler matrix beamforming network (BFN) operating in the W-band is proposed. Compared with traditional rectangular waveguide, the employment of RWG decreases the spacing between the adjacent radiators, thereby enhancing the beam-scanning range of the antenna array. Besides, in order to meet the requirements of compact dimensions and precise fabrication, an innovative micro metal additive manufacturing (M-MAM) technology is utilized for antenna fabrication. This technology involves a full-metal process characterized by low loss, ensuring the high-efficiency and high-gain properties of the antenna. During the antenna design using M-MAM technology, fabrication limitations are encountered, resulting in a novel arrangement of the antenna topological structure. The measured results demonstrate that the proposed RWG 4×4 slot antenna array, operating at 100 GHz, achieves a beam-scanning range of ±50° with a maximum gain of 14.5 dBi. The wide beam-scanning range, high operating band, and compact dimensions of the proposed antenna make it suitable for multibeam applications, providing a novel option for W-band multibeam antenna.
| Original language | English |
|---|---|
| Pages (from-to) | 5349-5354 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 72 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1 Jun 2024 |
Keywords
- Butler matrix
- W-band
- micro metal additive manufacturing (M-MAM)
- multibeam application
- ridged waveguide (RWG) slot antenna array
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