Design of the Variable Inclination Continuous Transverse Stub Antenna Based on Rectangular Grating Slow-Wave Structure

Table 1

Comparison of theoretical model and full-wave simulation.

Frequency (GHz)	Full-wave simulation		Theoretical calculation from β^unp		Theoretical calculation from β^−1
	Tilt angle (°)	εe^a	Tilt angle (°)	εe	Tilt angle (°)	εe
12.75	−4.6	1.255	−4.3	1.265	−4.5	1.257
12.25	−7.8	1.240	−7.5	1.253	−7.6	1.247
11.5	−13.1	1.221	−12.6	1.238	−12.8	1.231
10.95	−17.4	1.207	−16.8	1.229	−17.1	1.218

^aε_e is the equivalent permittivity of the element shown in Figure 3.