A Wideband Waveguide Antenna with Nearly Equal E- and H-Plane Radiation Patterns

Figure 4

Surface current distributions of the proposed antenna in the case of different excitation phases. Aperture current distributions in the case of (a) 𝜑=0^∘; (b) 𝜑=90^∘; (c) 𝜑=180^∘; (d) 𝜑=270^∘; and (e) inside surface current of TE₁₀ mode in the case of 𝜑=0^∘.