Abstract
A large-scale, high-gain, high-efficiency, optically transparent grid array antenna operating at millimeter-wave frequencies is proposed in this letter. The grid is employed to mitigate the feeding network loss caused by a lossy transparent conductor, which is composed of a series of rectangular loops directly connected to its neighbors rather than connected through a feeding network. The antenna adopts dual ports and achieves a synthetic gain by anti-phase feeding. By loading rectangular patches on the radiators of the outer region, the radiation and impedance characteristics are improved. A large-scale (5.4λ × 5.1λ × 0.04λ at 25 GHz) array was fabricated using a transparent metal mesh with a sheet resistance of 0.25 Ω/sq. A peak gain of 18.18 dBi, radiation efficiency of 59.6% and optical transparency of 84% were obtained. This antenna provides a valuable solution for large scale optically transparent microstrip array antennas.
| Original language | English |
|---|---|
| Pages (from-to) | 1598-1602 |
| Number of pages | 5 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 23 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 May 2024 |
Keywords
- Conduction loss
- feeding network
- grid array
- high gain
- large scale
- metal mesh
- optical transparent antenna