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

<div>The dual-post resonator reactance for <i>r</i><sub>1</sub> = 1 mm, <i>d</i> = 4.67 mm, <i>h</i><sub>1</sub> = 1.4 mm, and <i>h</i><sub>2</sub> = 2.4 mm.</div>

International Journal of Antennas and Propagation

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Figure 3

Figure 3: Continuously Frequency-Tunable Horn Filtennas Based on Dual-Post Resonators 