An adjustable dual-mode filter
A filter and resonator technology, which is applied in the field of tunable dual-mode filters, can solve the problems of limited application range and limited tuning range of tunable filters, and achieves small size, high Q value, and small passband insertion loss. Effect
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[0018] The present invention will be further described below in conjunction with accompanying drawing:
[0019] Such as figure 1 The shown adjustable dual-mode filter includes a substrate 17, a transmission main line 3 and a grounding strip 6 arranged on the substrate 17 in sequence, and a substrate 17 arranged between the transmission main line 3 and the grounding strip 6 and connected to the transmission main line The three-phase coupled key resonator 4 and the bias voltage unit 7 arranged on the substrate 17 between the transmission main line 3 and the grounding strip 6 and connected to the key resonator 4 . The grounding strip 6 is located on the upper surface of the end portion of the substrate, and the outside of the grounding strip 6 is flush with the side of the substrate 17 .
[0020] The key resonator 4 includes a coupling part 13, a grounding part 14 connected between the middle section of the coupling part 13 and the grounding belt 6, a branch one 15 and a branch ...
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