CN215912077U

CN215912077U - Novel low pass with string-shaped structure

Info

Publication number: CN215912077U
Application number: CN202121794968.8U
Authority: CN
Inventors: 陈勇; 李伟
Original assignee: Yancheng Dongshan Communication Technology Co ltd
Current assignee: Yancheng Dongshan Communication Technology Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-02-25
Anticipated expiration: 2031-08-03

Abstract

The utility model belongs to the technical field of low-pass filters, and particularly relates to a novel string-shaped structure low-pass filter, which comprises a low-pass string and a heat-shrinkable sleeve, and further comprises an input section, a low-resistance section, an output section and a high-resistance section, wherein the low-resistance sections are distributed in parallel, the input section and the output section are respectively fixed on the low-resistance sections at the head end and the tail end of the string-shaped structure to form the low-pass string, and the heat-shrinkable sleeve is wrapped on the low-pass string; the low resistance node is provided with a groove; the novel low-pass string has the advantages that the string-shaped structure is low-pass, the two low-pass strings with the same length have the indexes better than 10dB, so that the novel low-pass string can be shorter in length and smaller in diameter on the premise of the same index, and miniaturization is realized; the occupied space of the whole machine is small, the design volume of the whole machine is correspondingly reduced, the material cost of the whole machine is reduced, the index performance margin is large under the condition of not reducing and shortening low-pass strings, the debugging working time of the whole machine can be reduced, and the labor cost is reduced; the effective utilization space is increased, and the performance of the whole machine is improved.

Description

Novel low pass with string-shaped structure

Technical Field

The utility model belongs to the technical field of low-pass filters, and particularly relates to a novel low-pass filter with a string-shaped structure.

Background

The filter is a filter circuit consisting of a capacitor, an inductor and a resistor, and can effectively filter a frequency point of a specific frequency in the wireless microwave signal or frequencies except the frequency point to obtain a microwave signal of the specific frequency or eliminate the microwave signal of the specific frequency.

A low-pass filter is an electronic filtering device that allows signals below a cutoff frequency to pass, but does not allow signals above the cutoff frequency to pass.

Two low-pass implementation modes of the existing metal filter are commonly used, namely a sugarcoated haw string type low-pass component and a strip-shaped piece low-pass component.

A chain-type low-pass component; the requirement on space length and diameter is high, the high-frequency section inhibition index is directly influenced by the total length from the first section to the last section and the diameter, the length of low-pass placement is not enough due to space limitation of some products, the low-pass is not installed in space, the cost is high, the index is difficult to realize, and the miniaturization is not facilitated.

A strip low pass assembly; the requirement on space length is high, and banding piece total length directly influences the high band and suppresses the index, and some products are because the space is limited, and the length of placing for the low pass is not long enough, can lead to the low pass not to have the space to place, and the index is difficult to realize, is used for on the less product of volume (like the 5G product), and the cavity increases low logical piece service length, leads to occupying effective chamber space, and it is bad to influence whole quick-witted performance index, increases the complete machine volume, and the cost uprises.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a novel string-shaped structure low-pass filter which has the characteristics of low cost, high performance index and low space occupation ratio.

In order to achieve the purpose, the utility model provides the following technical scheme: a novel low pass with a string-shaped structure comprises a low pass string and a heat-shrinkable sleeve, and further comprises an input section, a low resistance section, an output section and a high resistance section, wherein the low resistance sections are distributed in parallel, two adjacent low resistance sections are connected into a string-shaped structure by using the high resistance section, the input section and the output section are respectively fixed on the low resistance sections at the head end and the tail end of the string-shaped structure to form the low pass string, and the heat-shrinkable sleeve is wrapped on the low pass string; the low resistance node is provided with a groove.

As a preferred technical scheme of the utility model, the low-resistance joint is a cylindrical structural body, and the grooves are formed in two planes of the low-resistance joint.

As a preferred technical scheme of the utility model, the grooves on the same low-resistance node are the same in shape and size.

As a preferable technical scheme of the utility model, the groove is a circular groove.

As a preferable technical solution of the present invention, the heat shrinkable tube is an FEP tube.

Compared with the prior art, the utility model has the beneficial effects that: the novel low-pass string has the advantages that the string-shaped structure is low-pass, the two low-pass strings with the same length have the indexes better than 10dB, so that the novel low-pass string can be shorter in length and smaller in diameter on the premise of the same index, and miniaturization is realized; the occupied space of the whole machine is small, the design volume of the whole machine is correspondingly reduced, the material cost of the whole machine is reduced, the index performance margin is large under the condition of not reducing and shortening low-pass strings, the debugging working time of the whole machine can be reduced, and the labor cost is reduced; the effective utilization space is increased, and the performance of the whole machine is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2 according to the present invention;

FIG. 4 is a diagram illustrating the low pass component index S parameter in the prior art;

FIG. 5 is a diagram of the low pass device indicator S parameter of the present invention;

in the figure: 1. a low pass string; 101. an input section; 102. low resistance node; 103. an output section; 104. a high resistance node; 105. a groove; 2. and (4) heat-shrinkable tubing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides the following technical solutions: a novel low pass with a string-shaped structure comprises a low pass string 1 and a heat-shrinkable sleeve 2, and further comprises an input section 101, a low resistance section 102, an output section 103 and a high resistance section 104, wherein the low resistance sections 102 are distributed in parallel, two adjacent low resistance sections 102 are connected into a string-shaped structure by the high resistance section 104, the input section 101 and the output section 103 are respectively fixed on the low resistance sections 102 at the head end and the tail end of the string-shaped structure to form the low pass string 1, and the heat-shrinkable sleeve 2 is wrapped on the low pass string 1; the low-resistance section 102 is provided with a groove 105, the input section 101 is connected with the first low-resistance section 102, the low-resistance section 102 is connected with the high-resistance section 104, and the like, two adjacent low-resistance sections 102 are connected into a serial structure by using the high-resistance section 104, and the low-resistance section 102 at the tail end is connected with the output section 103.

Specifically, according to fig. 1, fig. 2 and fig. 3, in the present embodiment, the low-resistance node 102 is a cylindrical structure, and the grooves 105 are formed on two planes of the low-resistance node 102, so that the high-frequency-band suppression index can be adjusted and improved.

Specifically, as shown in fig. 1, fig. 2, and fig. 3, in this embodiment, the shape and size of the groove 105 on the same low-resistance node 102 are the same, so as to ensure the reliability of high-frequency suppression.

Specifically, according to fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, in this embodiment, the groove 105 is a circular groove, and the depth h and the diameter D of the groove 105 can be adjusted to improve the high-frequency-band rejection index, as shown in fig. 4 and fig. 5.

Specifically, as shown in fig. 1, fig. 2 and fig. 3, in the present embodiment, the heat shrinkable sleeve 2 is an FEP sleeve, which has excellent wear resistance and flexibility, excellent flame retardant property, and a low dielectric constant in a wide temperature and frequency range.

The working principle and the using process of the utility model are as follows: the low pass of the string structure is connected with a first low resistance node 102 by using an input node 101, the low resistance node 102 is connected with a high resistance node 104, and so on, two adjacent low resistance nodes 102 are connected into the string structure by using the high resistance node 104, the low resistance node 102 at the tail end is connected with an output node 103 to form a low pass string 1, and a heat-shrinkable sleeve 2 is wrapped on the low pass string 1;

the low-resistance node 102 is provided with a groove 105, and the depth h and the diameter D of the groove 105 can be adjusted to improve the high-frequency band inhibition index.

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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. 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 novel string form structure low pass, includes low pass cluster (1) and heat shrinkage bush (2), its characterized in that: the low-pass filter is characterized by further comprising input nodes (101), low-resistance nodes (102), output nodes (103) and high-resistance nodes (104), wherein the low-resistance nodes (102) are distributed in parallel, two adjacent low-resistance nodes (102) are connected into a string-shaped structure through the high-resistance nodes (104), the input nodes (101) and the output nodes (103) are respectively fixed on the low-resistance nodes (102) at the head end and the tail end of the string-shaped structure to form a low-pass string (1), and the low-pass string (1) is wrapped by a heat-shrinkable sleeve (2); the low-resistance node (102) is provided with a groove (105).

2. The novel low pass filter with string structure as claimed in claim 1, wherein: the low-resistance joint (102) is a cylindrical structural body, and the grooves (105) are formed in two planes of the low-resistance joint (102).

3. The novel low pass filter with string structure as claimed in claim 2, wherein: the shape and the size of the grooves (105) on the same low-resistance node (102) are the same.

4. The novel low pass filter with string structure as claimed in claim 1, wherein: the groove (105) is a circular groove.

5. The novel low pass filter with string structure as claimed in claim 1, wherein: the heat-shrinkable tube (2) is an FEP tube.