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Ka-band Large-Aperture Slotted Waveguide Antenna
This antenna is intended for high-resolution radar application. The antenna contains of about 1500 radiating slots, which forms the fan-like radiation pattern in the broadside with low sidelobes. The antenna is produced from the aluminum alloy, thus it is lightweight (only 6.2 kg) and suitable for airborne applications.
Fig. 1. Large-aperture Ka-band slotted waveguide antenna
Antenna Characteristics
| Operating bandwidth, GHz | 0.2 (in Ka-band) |
| Beam type | fan |
| 3dB beam width (E-plane x H-plane), deg | 10 x 0.5 |
| Polarization | Linear/Vertical |
| Cross-polarization level, dB | <-30 |
| Side lobes level, dB | <-22 dB |
| Gain, dBi | >36 |
| VSWR | <1.4 |
| Dimensions (aperture), mm | 1078 x 100 |
| Height, mm | 27 |
| Weight, kg | 6.2 |