A Directional Antenna in a Matching Liquid for Microwave Radar Imaging

Table 1

Details of the waveguide section: waveguide (WG) size and ridge height.

Waveguide section	Waveguide length (mm)	Waveguide height (mm)	Ridge height (mm)
1	29.4	23.3	10.0
2	14	31	13.3
3	14	38.6	15.4
4	8.4	43.2	15.4
5	8.4	47.8	14.7
6	8.4	52.4	14
7	8.4	57	9.8
8	8.4	61.6	0