A Reconfigurable Dual-Band Band-Stop Filter
A band-stop filter and dual-band technology, which is applied to waveguide devices, electrical components, circuits, etc., can solve the problem that there are no two frequency bands with constant absolute bandwidth, and achieve flexible and miniaturized design, good electromagnetic compatibility, and improved The effect of integration
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Embodiment 1
[0031] Such as figure 1As shown, the reconfigurable dual-band band rejection filter of this embodiment includes the upper microstrip line structure 1 and active circuit, the middle dielectric substrate 2, the lower ground metal patch (not shown in the figure) and the metal Through holes, the metal through holes sequentially pass through the microstrip line structure 1, the dielectric substrate 2 and the grounding metal patch, so that the microstrip line structure 1 and the grounding metal patch are connected through the dielectric substrate 2; the microstrip line structure 1 includes a main transmission line 3, a first resonator 4, a second resonator 5, a third resonator 6, and a fourth resonator 7. The main transmission line 3 is bent and folded into a structure with symmetrical left and right sides and a downward concave in the middle, so The first resonator 4 and the second resonator 5 are respectively arranged on the lower left and lower right of the main transmission line...
Embodiment 2
[0042] In this embodiment, a constant absolute bandwidth reconfigurable dual-band band-stop filter is designed. figure 1 Based on the structure, adjust the appropriate coupling coefficient k according to formula (1) i,j To achieve the requirement of constant absolute bandwidth, adjust the capacitance value of the varactor diode to change the stop band frequency and the equivalent magnetic coupling strength, so that the change trend of the total coupling strength meets the theoretical conditions. The circuit and electromagnetic simulation software of this embodiment is Agilent Advanced Design System (ADS). The constant absolute bandwidth reconfigurable dual-band band-stop filter is selected and processed on a dielectric substrate with a dielectric constant of 2.55, a thickness of 0.8mm, and a loss tangent of 0.0029. The specific physical dimensions are shown in Table 1 below.
[0043]
[0044] Table 1 Dimensions of reconfigurable dual-band bandstop filter
[0045] This emb...
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