Continuously Frequency-Tunable Horn Filtennas Based on Dual-Post Resonators

Figure 4

Dual-post resonator design curves example. Transmission zero and pole frequencies as a function of (a) the resonator distance for r₁ = 1 mm, h₁ = 1.4 mm, and h₂ = 2.4 mm; (b) resonator height difference for r₁ = 1 mm and d = 4.67 mm; and (c) resonator radii for d = 4.67 mm, h₁ = 1.4 mm, and h₂ = 2.4 mm.

(a)

(b)

(c)