Research Article
A Directional Antenna in a Matching Liquid for Microwave Radar Imaging
Table 2
The double-ridged horn antenna parameters.
| Section | Parameters | Dimension |
| Waveguide | Waveguide width, | 56 mm | Waveguide height, | 23.2 mm | Waveguide length, | 29.4 mm | Ridge width | 13 mm | Ridge height | 10 mm | Ridge length | 17.5 mm |
| Pyramidal back cavity | Cavity length, | 8.4 mm | In the waveguide side Cavity width, Cavity height, | 56 mm 23.3 mm | In the other side Cavity width Cavity height, | 19.6 mm 2.8 mm |
| Horn | Horn length, | 70 mm | In the waveguide side Width, Height, | 56 mm 23.3 mm | At the horn aperture Width, Height, | 61.6 mm 61.6 mm |
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is not shown in Figure 2(b).
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