Fig. 1. Schematic of cross-section of antipodal overlapping finline

Fig. 2. Dispersion characteristics of half-filled waveguide

Fig. 3. Normalized cutoff wavelength of dominant mode and single-mode bandwidth in antipodal overlapping finline loaded with right- and left-handed materials versus d/b when s/a=0.3 and c+s/2=a/2. (a) Normalized cutoff wavelength when l/a=0.01; (b) single-mode bandwidth when l/a=0.01; (c) normalized cutoff wavelength when l/a=0.05; (d) single-mode bandwidth when l/a=0.05; (e) normalized cutoff wavelength when l/a=0.10; (f) single-mode bandwidth when l/a=0.10

Fig. 4. Normalized cutoff wavelength of dominant mode and single-mode bandwidth in antipodal overlapping finline loaded with right- and left-handed materials versus s/a when l/a=0.05 and d/b=0.5. (a) Normalized cutoff wavelength; (b) single-mode bandwidth

Fig. 5. Field patterns of dominant mode in antipodal overlapping finline loaded with right- and left-handed materials when c/a=0.35, s/a=0.3, and d/b=1/2. (a) l/a=0.01, εr=10, μr=1; (b) l/a=0.01, εr=10, μr=10; (c) l/a=0.01, εr=-10, μr=-10; (d) l/a=0.05, εr=10, μr=1; (e) l/a=0.05, εr=10, μr=10; (f) l/a=0.05, εr=-10, μr=-10; (g) l/a=0.10, εr=10, μr=1; (h) l/a=0.10, εr=10, μr=10; (i) l/a=0.10, εr=-10, μr=-10

Fig. 6. Field patterns of first higher-order mode in antipodal overlapping finline loaded with right- and left-handed materials when c/a=0.35, s/a=0.3, and d/b=1/2. (a) l/a=0.01, εr=10, μr=1; (b) l/a=0.01, εr=10, μr=10; (c) l/a=0.01, εr=-10, μr=-10; (d) l/a=0.05, εr=10, μr=1; (e) l/a=0.05, εr=10, μr=10; (f) l/a=0.05, εr=-10, μr=-10; (g) l/a=0.10, εr=10, μr=1; (h) l/a=0.10, εr=10, μr=10; (i) l/a=0.10, εr=-10, μr=-10

Fig. 7. Dispersion characteristics of dominant mode inantipodal overlapping finline loaded with right- and left-handed materials (c/a=0.35, s/a=0.3, l/a=0.05, d/b=0.25)

Table 1. Computation results of cutoff wavelength in unilateral finline when b/a=0.5, d/b=0.25, and l/a=0.01