| 摘要 |
A voltage-controlled tunable filter that comprises at least one coaxial combline resonator that includes at least one metallized through-hole, an input/output coupling metallization on at least one surface of said at least one coaxial combline resonator, at least one tunable varactor associated with said at least one coaxial cobline resonator, and an inter-pole-and-port cross coupling component cross coupling a filter pole of said at least one combline resonator and said at least one input-output coupling metallization. At least one DC biasing point can be included to provide voltage to said at least one tunable varactor. In a preferred embodiment, the at least one tunable varactor is four tunable varactors and the least one input/output coupling metallizations is two input/output coupling metallizations. The voltage-controlled tunable filter can be a monoblock voltage controlled tunable filter or a coaxial block voltage controlled tunable filter. Also, in a preferred embodiment, the inter-pole-and-port cross coupling component can provide either a variable capacitive cross coupling, a variable inductive cross coupling or a variable capacitive and inductive cross coupling. |
