Adjustable filter
A filter and adjustable technology, which is applied in the field of filters, can solve the problem that there are few means for the cavity area of the resonant cavity, and the cavity area cannot be changed by metal plates, so as to achieve the effect of changing the filtering effect
Inactive Publication Date: 2018-11-23
CHENGDU XUSITE TECH CO LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is that there are few means to change the cavity area of the resonant cavity, and the cavity area cannot be changed directly by using metal plates, etc. The purpose is to provide an adjustable filter to solve the above problems
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[0020] like Figure 1~2 As shown, a tunable filter of the present invention includes an input terminal 11 provided on the left side of the waveguide 1, an output terminal 12 provided on the right side of the waveguide 1, and several Rectangular opening, the direction of the rectangular opening is perpendicular to the direction of the waveguide 1, the metal plate 3 is inserted into the rectangular opening, the area of the waveguide 1 between two adjacent metal plates 3 forms a resonant cavity, and the waveguide 2 is Also be provided with adjusting screw 4, the rectangular opening of described waveguide 1 is provided with sector gear 5, and described sector gear 5 cooperates with metal plate 3, adjusts the depth that metal plate 3 is inserted into waveguide 1, and described sector gear 5 From the input end 11 to the output end 12, the size increases sequentially and proportionally, and the increase ratio is 1:2:3. Through the cooperation of the sector gear and the rack on the...
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The invention discloses an adjustable filter, wherein an input end is arranged on the left side of a waveguide tube; an output end is arranged on the right side of the waveguide tube; a plurality of rectangular openings are formed in the side surface of the waveguide tube, and the directions of the rectangular openings are perpendicular to the direction of the waveguide tube; a metal plate is inserted into each rectangular opening, and a waveguide tube area between every two adjacent metal plates forms a resonant cavity; an adjusting screw is further arranged on the waveguide tube; a fan-shaped gear is arranged on the rectangular opening of the waveguide tube; the fan-shaped gear is matched with the corresponding metal plate; ad the depth of the metal plate inserted into the waveguide tubeis adjusted, and the size of the fan-shaped gear from the input end to the output end is increased in sequence, wherein the increasing ratio is 1: 2 : 3. The fan-shaped gear is matched with a rack onthe metal plate, so that the metal plate can move up and down; and the depth of the metal plate inserted into the waveguide tube is adjusted, and the channel area of the waveguide tube is increased or reduced, so that the filtering effect can be rapidly and mechanically adjusted.
Description
technical field [0001] The invention relates to a filter, in particular to an adjustable filter. Background technique [0002] Microwave filters are an extremely important part of many modern microwave and millimeter wave systems, and their performance often directly affects the performance of the entire system. Due to the increasing shortage of radio communication frequency resources, the working frequency of various communication systems will develop to higher frequency microwave or even millimeter wave. In order to make better use of spectrum resources, the requirements for various communication frequency points are relatively narrow. At this time, multi-stage filtering is usually used to adjust the filtering effect, which cannot effectively save resources and improve the use effect of a single filter. At present, there is no filter that can quickly adjust the filtering effect. Contents of the invention [0003] The technical problem to be solved by the present invent...
Claims
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IPC IPC(8): H01P1/20
CPCH01P1/20
Inventor 王东罗志刚宋旭
Owner CHENGDU XUSITE TECH CO LTD