1. Technical Field
The present disclosure relates to cavity filters, and more particularly to a cavity filter for saving the space of out of the cavity.
2. Description of Related Art
A cavity filter is a conventional module in communication devices. Generally, the cavity filter includes a lid and a plurality of houses. Each house corresponds to an oscillation circuit and defines at least one resonator pipe. The cavity filter includes a plurality of adjusting screws mounted on the lid. Thus, the surface of the lid is not flat because of the adjusting screws positioned on the lid, and it needs additional space out of the house to contain the adjusting screw.
Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, all the views are schematic, and like reference numerals designate corresponding parts throughout the several views.
The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.
In the embodiment, the assistant ring 15 is fixed on the lid 16 by welding or other methods. The resonator cup 14 and the resonator pipe 12 are combined by welding.
In the embodiment, the bottom board 111 and the resonator pipe 12 are incorporate and made by die casting. Machining of the bottom board 111 and the resonator pipe 12 is finished after being made in die casting for assembly.
In the embodiment, the problem that the surface of the lid 16 is not flat is solved, and the adjusting screw 13 is rotated into the housing 11 from the open end of the screw thread hole 112 to save the space of out of the housing 11. In the present disclosure, the cavity filter 10 is appealing and the space of containing the cavity filter is saved.
Although the features and elements of the present disclosure are described as embodiments in particular combinations, each feature or element can be used alone or in other various combinations within the principles of the present disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Number | Date | Country | Kind |
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103102193 | Jan 2014 | TW | national |