CN218849748U

CN218849748U - Filter with high tuning effect

Info

Publication number: CN218849748U
Application number: CN202223148461.2U
Authority: CN
Inventors: 胡道甫
Original assignee: Jiangsu Kenbo Electronic Technology Co ltd
Current assignee: Jiangsu Kenbo Electronic Technology Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-11
Anticipated expiration: 2032-11-25

Abstract

The utility model provides a wave filter of high tuning effect, including resonant cavity, apron, resonance bar and harmonious screw rod, resonant cavity is the opening that makes progress, and the apron is fixed at the resonant cavity top, and harmonious screw rod telescopic is fixed on the apron, and the resonance bar is located the resonant cavity, and harmonious screw rod lower extreme stretches into the cavity intracavity of resonance bar, and the harmonious screw rod lower extreme that stretches into cavity intracavity of resonance bar divide into a plurality of screw rod portions, all is equipped with the heliciform recess in every screw rod portion. The utility model discloses stretch into in the cavity of resonance bar harmonious screw rod lower extreme divide into a plurality of screw rod portions, all is equipped with the heliciform recess in every screw rod portion, has then increased the whole area of heliciform recess, then the filter effect of further improvement wave filter, and harmonious screw rod lower extreme divide into a plurality of screw rod portions, then the filter effect of further improvement wave filter.

Description

Filter with high tuning effect

Technical Field

The utility model relates to a frequency-selecting device technical field specifically is a wave filter of high tuning effect.

Background

The filter plays a very important role in wireless communication and electronic signal processing, and is mainly used for filtering signals of used frequencies and suppressing interference signals. The cavity filter adopts a cavity structure, and one cavity can be equivalent to an inductor parallel capacitor, so that a resonant stage is formed, the Q value of the filtering function is high, the size is small, the loss is low, the bearing power can reach 100W, the reliability is high, the stability is good, and the temperature performance is good. The cavity filter mainly comprises a resonant cavity, a resonant rod, a cover plate and a tuning screw rod. The resonance rod is fixed on the bottom plate in the resonance cavity, and the cover plate is installed on the resonance cavity. The tuning screw rod is telescopically arranged on the cover plate, and one end of the tuning screw rod extends into the cavity of the resonance rod.

Application number 201720924741.8's utility model provides a cavate filter, including resonant cavity, apron, resonance bar and tuning screw, resonant cavity is the opening that makes progress, and the apron is fixed at the resonant cavity top, and tuning screw telescopic is fixed on the apron, and the resonance bar is located the resonance bar, and the tuning screw lower extreme stretches into the cavity intracavity of resonance bar, is equipped with the heliciform recess on the tuning screw, and the tuning screw still coats and has the insulating material layer. This wave filter sets up heliciform recess or helical coil on the tuning screw rod on the basis of current wave filter, forms equivalent capacitance in-process when apron and resonance bar coupling like this, and the heliciform recess is corresponding electrified, just so is equivalent to having established ties an inductance on coupling capacitance's basis, can optimize the Q value of wave filter through establishing ties this inductance, avoids appearing high-frequency interference signal, just so guarantees that the wave filter still can normally work at the high-frequency band under high-power operating mode, can effectively improve the filtering effect of wave filter.

However, the above utility model still has room for improvement: the whole area of the spiral groove on the lower end of the tuning screw can be further increased so as to further improve the filtering effect of the filter; meanwhile, the lower end of the tuning screw rod can be separately arranged, so that the filtering effect of the filter can be further improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wave filter of high tuning effect to solve the problem that proposes in the above-mentioned background art.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a wave filter of high tuning effect, includes resonant cavity, apron, resonance bar and tuning screw, resonant cavity is the opening that makes progress, the apron is fixed resonant cavity top, tuning screw telescopic is fixed on the apron, the resonance bar is located in the resonant cavity, tuning screw lower extreme stretches into in the cavity of resonance bar, stretch into in the cavity of resonance bar the tuning screw lower extreme divide into a plurality of screw rod portions, every screw rod portion all is equipped with the heliciform recess.

And a polytetrafluoroethylene insulating material layer is coated on the tuning screw rod (4).

The depth of the spiral groove (6) is 0.1-0.2mm.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is: the utility model discloses stretch into in the cavity of resonance bar the harmonious screw rod lower extreme divide into a plurality of screw rod portions, all is equipped with the heliciform recess in every screw rod portion, has then increased the whole area of heliciform recess, then the filter effect of further improvement wave filter, and the harmonious screw rod lower extreme divide into a plurality of screw rod portions, then the filter effect of further improvement wave filter.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;

in the figure: 1, a resonant cavity; 2, covering a plate; 3 a resonant rod; 4 harmonic screw rod; 5 a screw part; 6 helical grooves.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a wave filter of high tuning effect, including resonant cavity 1, apron 2, resonance bar 3 and tuning screw 4, resonant cavity 1 upwards opening, apron 2 is fixed at resonant cavity 1 top, tuning screw 4 telescopic is fixed on apron 2, resonance bar 3 is located resonance cavity 1, the cavity intracavity of resonance bar 3 is stretched into to tuning screw 4 lower extreme, the tuning screw 4 lower extreme that stretches into cavity intracavity in resonance bar 3 is divided into a plurality of screw rod parts 5, all be equipped with heliciform recess 6 on every screw rod part 5.

The lower end of the tuning screw 4 extending into the hollow cavity of the resonance rod 3 is divided into two screw parts 5.

The tuning screw 4 is coated with a layer of polytetrafluoroethylene insulation.

The depth of the spiral groove 6 is 0.1-0.2mm.

Example 2

Referring to fig. 2, the present invention provides a technical solution: the utility model provides a wave filter of high tuning effect, including resonant cavity 1, apron 2, resonance bar 3 and tuning screw 4, resonant cavity 1 upwards opening, apron 2 is fixed at resonant cavity 1 top, tuning screw 4 telescopic is fixed on apron 2, resonance bar 3 is located resonance cavity 1, the cavity intracavity of resonance bar 3 is stretched into to tuning screw 4 lower extreme, the tuning screw 4 lower extreme that stretches into cavity intracavity in resonance bar 3 is divided into a plurality of screw rod parts 5, all be equipped with heliciform recess 6 on every screw rod part 5.

The lower end of the tuning screw 4 extending into the hollow cavity of the resonance rod 3 is divided into three screw parts 5.

The depth of the spiral groove 6 is 0.1-0.2mm.

It is noted that relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a filter of high tuning effect, includes resonant cavity (1), apron (2), resonance bar (3) and tuning screw (4), resonant cavity (1) opening upwards, apron (2) are fixed resonant cavity (1) top, tuning screw (4) telescopic is fixed on apron (2), resonance bar (3) are located in resonant cavity (1), tuning screw (4) lower extreme stretches into in the cavity of resonance bar (3), its characterized in that: stretch into in the cavity of resonance bar (3) tuning screw rod (4) lower extreme divide into a plurality of screw rod portions (5), every all be equipped with heliciform recess (6) on screw rod portion (5).

2. The high tuning effect filter according to claim 1, wherein: and a polytetrafluoroethylene insulating material layer is coated on the tuning screw rod (4).

3. The high tuning effect filter according to claim 1, wherein: the depth of the spiral groove (6) is 0.1-0.2mm.