Band-pass filter and control method thereof
AssigneeNEC Corporation
InventorTakahiro Miyamoto
Life of this patent
Estimating the term…
Abstract
There is provided a band-pass filter capable of easily changing a bandwidth of a pass band. A band-pass filter (1B) of the present disclosure includes: a housing (11), a plurality of resonant plates (12) stored in the housing (11), a first coupling conductor (15) connecting two adjacent resonant plates (12) of the plurality of resonant plates (12), and a second coupling conductor (16) arranged at a position affecting a coupling coefficient between the two adjacent resonant plates (12), wherein a distance from the resonant plate (12) to the second coupling conductor (16) is changeable.
Claims8
A band-pass filter comprising:
- a housing;
- a plurality of resonant plates stored in the housing;
- a first coupling conductor connecting two adjacent resonant plates of the plurality of resonant plates;
- a second coupling conductor arranged at a position affecting a coupling coefficient between the two adjacent resonant plates;
- a line arranged at two ends of the housing;
- one of the plurality of resonant plates disposed at each of the two ends,
- a third coupling conductor arranged at a position affecting an external Q factor between the resonant plate at each end and the corresponding line,
- wherein a distance from one of the two adjacent resonant plates to the second coupling conductor is changeable, and
- wherein a distance from another one of the two adjacent resonant plates to the third coupling conductor is changeable.
A control method of a band-pass filter including a plurality of resonant plates stored in a housing, the control method comprising:
- connecting two adjacent resonant plates of the plurality of resonant plates by a first coupling conductor;
- arranging a second coupling conductor at a position affecting a coupling coefficient between the two adjacent resonant plates;
- arranging a line at two ends of the housing;
- one of the plurality of resonant plates disposed at each of the two ends,
- arranging a third coupling conductor at a position affecting an external Q factor between the resonant plate at each end and the corresponding line;
- changing a distance from one of the two adjacent resonant plates to the second coupling conductor;
- and
- changing a distance from another of the two adjacent resonant plates to the third coupling conductor.
Dependencies are inferred from the claim text.