Research Article
Planar High-Gain Millimeter-Wave Slotted SIW Cavity Antenna Array with Low Sidelobe and Grating Lobe Levels
Table 3
Performance comparison with other reported planar MMW antenna arrays.
| | Ref. | Type | Freq. (GHz) | No. of elements | Peak gain (dBi) | Sidelobe/grating lobe level (dB) | Aperture Eff. (%) | Size (λ0) |
| | [15] | SIW (patch) | 60 | 4 × 4 | 19.6 | −13 | 65 | 3.26 × 3.42 | | [17] | Empty SIW (patch) | 28.25 | 4 × 4 | 18.2 | ∼−10 | 32.4 | 4.06 × 4.0 | | [18] | SIW (ME-dipole) | 60 | 8 × 8 | 26.1 | ∼−10 | 77.8 | 6.8 × 6.12 | | [22] | RGW (slot) | 60 | 16 × 16 | 32.5 | −13 | 70 | 1.6 × 1.65 | | [25] | SICL (patch) | 41.5 | 6 × 6 | 17.6 | −20.4 | 26.9 | 4.56 × 3.73 | | [30] | SIW (slot) | 45 | 2 × 4 | 21.7 | −12 | 76.2 | 4.0 × 3.86 | | [31] | SIC (spiral antenna) | 60 | 2 × 2 | 20 | ∼ −10 | 55.6 | 3.87 × 3.7 | | [33] | SIW (patch) | 28 | 1 × 8 | 13.97 | −20 | 15.8 | ∼6.6 × 1.9 | | Proposed | SIW (slotted high-order mode cavity) | 27.3 | 1 × 4 | 21.4 | −17.9 | 78 | 7.6 × 1.85 |
|
|
∗The aperture efficiency is calculated as (G × λ02)/(4π × Ap).
|
