Abstract
A wideband antenna array with full metal structure is proposed. In this paper, cavity with stepped ridges is used as the antenna element, and full corporate-feed network is adopted for wide bandwidth. Furthermore, air-filled microstrip feeding network is also employed to avoid substrate losses so that higher efficiency can be achieved. Based on the above-mentioned, a 4 × 4 antenna array working in the Ku-band is designed and fabricated via conventional milling techniques. The fabrication error effects on the antenna performances are also discussed. Experimental result shows 36.5% (10.3-14.9 GHz) operating bandwidth at VSWR<2. The measured realized gain varies from 18.4 to 21.4 dBi over the band of 10.5-14.5 GHz. The total antenna efficiency is higher than 70%, considering that the aperture size of the antenna array is only 80 mm × 80 mm. In addition to that, the proposed antenna array has a low profile (height) of 18 mm.
| Original language | English |
|---|---|
| Article number | 7875482 |
| Pages (from-to) | 3041-3048 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 65 |
| Issue number | 6 |
| DOIs | |
| State | Published - 2017 |
Keywords
- Air-filled microstrip
- Full-corporate-feed
- High efficiency
- Wideband