Filter with low port delay

Abstract

The utility model provides a filter with low port delay, which comprises a plurality of low-impedance structures and a plurality of high-impedance structures, the low-impedance structures and the high-impedance structures are alternately arranged, and the filter is characterized in that the cross sectional area of each low-impedance structure is larger than or smaller than the cross sectional area of the adjacent low-impedance structure. The impedance value of the port can be changed by changing the cross sectional area of the low pass, so that the port time delay of the filter becomes strong by changing the size and shape of the high and low impedance of the low pass, and the filter obtains excellent standing wave performance. By optimizing the sizes and the shapes of the low-impedance structure and the high-impedance structure, 3.5 ns port time delay can be easily realized, the port time delay is improved by 6ns, and the comprehensive performance of the filter is more excellent.

Description

Technical Field

[0001] The utility model belongs to the technical field of mobile communication, and particularly relates to a filter with low port delay. Background Technique

[0002] With the development of mobile communication technology, filters have become indispensable frequency selection devices. When the bandwidth of the filter is very wide, a strong port delay is required to meet the standing wave requirements. Most filters use the scheme of raising the copper sheet of the welding port to enhance the filter delay. However, for filters with a low-pass port, when it is raised to a certain extent, the port delay of the filter cannot be enhanced, which limits the application scenarios of the filter.

[0003] Figure 1 is the port form of a traditional filter with a low-pass port. From the first cavity of the filter to the connector, a common transmission sheet 10 is used. The simulated filter response bandwidth is as Figure 6 shown, and it can only achieve a port delay of 9.5 ns. Summary of the Utility Model

[0004] The technical object of the utility model is to provide a filter with low port delay. By changing the sizes of the low-pass high and low impedances, the filter obtains excellent standing wave performance, enhances the port delay of the filter, and meets the standing wave requirements of the filter.

[0005] To solve the above technical problems, the utility model is realized as follows. A filter with low port delay includes: a plurality of low-impedance structures and a plurality of high-impedance structures, and the low-impedance structures and the high-impedance structures are arranged alternately. It is characterized in that the cross-sectional area of each low-impedance structure is larger or smaller than the cross-sectional area of the adjacent low-impedance structure.

[0006] Further, the length of each high-impedance structure is larger or smaller than the length of the adjacent high-impedance structure.

[0007] Further, the thickness of each high-impedance structure is larger or smaller than the thickness of the adjacent high-impedance structure.

[0008] Further, the low-impedance structure includes a first low-impedance body, a second low-impedance body, a third low-impedance body, a fourth low-impedance body, and a fifth low-impedance body arranged in sequence;

[0009] The high-impedance structure includes a first high-impedance antibody, a second high-impedance antibody, a third high-impedance antibody, and a fourth high-impedance antibody arranged in sequence. The first high-impedance antibody is disposed between the first low-impedance antibody and the second low-impedance antibody, the second high-impedance antibody is disposed between the second low-impedance antibody and the third low-impedance antibody, the third high-impedance antibody is disposed between the third low-impedance antibody and the fourth low-impedance antibody, and the fourth high-impedance antibody is disposed between the fourth low-impedance antibody and the fifth low-impedance antibody;

[0010] The cross-sectional area of the first high-impedance antibody is smaller than that of the second high-impedance antibody, the cross-sectional area of the second high-impedance antibody is larger than that of the third high-impedance antibody, and the cross-sectional area of the third high-impedance antibody is smaller than that of the fourth high-impedance antibody.

[0011] Furthermore, the cross-sectional area of the first high-impedance antibody is equal to that of the third high-impedance antibody, and the cross-sectional area of the second high-impedance antibody is equal to that of the fourth high-impedance antibody.

[0012] Furthermore, the first high-impedance antibody, the second high-impedance antibody, the third high-impedance antibody, and the fourth high-impedance antibody are all cylindrical.

[0013] Furthermore, the length of the first high-impedance antibody is smaller than that of the second high-impedance antibody, the length of the second high-impedance antibody is equal to that of the third high-impedance antibody, and the length of the third high-impedance antibody is larger than that of the fourth high-impedance antibody.

[0014] Furthermore, the length of the first high-impedance antibody is equal to that of the fourth high-impedance antibody.

[0015] Furthermore, the first low-impedance antibody, the second low-impedance antibody, the third low-impedance antibody, the fourth low-impedance antibody, and the fifth low-impedance antibody are all cuboids, and the widths of the first low-impedance antibody, the second low-impedance antibody, the third low-impedance antibody, the fourth low-impedance antibody, and the fifth low-impedance antibody are all equal;

[0016] The length of the first low-impedance antibody is smaller than that of the second low-impedance antibody, the length of the second low-impedance antibody is equal to that of the fourth low-impedance antibody, the length of the third low-impedance antibody is smaller than that of the first low-impedance antibody, and the length of the fifth low-impedance antibody is equal to that of the first low-impedance antibody.

[0017] Furthermore, the thickness of the first low-impedance antibody is smaller than that of the second low-impedance antibody, the thickness of the second low-impedance antibody is equal to that of the fourth low-impedance antibody, the thickness of the third low-impedance antibody is larger than that of the second low-impedance antibody, and the thickness of the fifth low-impedance antibody is equal to that of the first low-impedance antibody.

[0018] Compared with the prior art, the filter with low port delay in the present utility model has the following beneficial effects:

[0019] By changing the cross-sectional area of the low-pass part, the port impedance value can be changed. Furthermore, by changing the sizes and shapes of the high and low impedances of the low-pass part, the port delay of the filter can be enhanced, and the filter can obtain excellent standing wave performance.

[0020] By optimizing the sizes and shapes of the low-impedance structure and the high-impedance structure, a port delay of 3.5 ns can be easily achieved, and the port delay is increased by 6 ns, making the comprehensive performance of the filter more excellent. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of a traditional filter with a low-pass at the port;

[0022] Figure 2 is a schematic overall structural diagram of the filter with low port delay in Embodiment 1 of the present utility model;

[0023] Figure 3 is a front view of the filter with low port delay in Embodiment 1 of the present utility model;

[0024] Figure 4 is a three-dimensional view of the high and low impedances in Embodiment 1 of the present utility model;

[0025] Figure 5 is a front view of the high and low impedances in Embodiment 1 of the present utility model;

[0026] Figure 6 is a frequency response simulation curve of a traditional filter with a low-pass at the port;

[0027] Figure 7 is a frequency response simulation curve of the filter with low port delay in Embodiment 1 of the present utility model;

[0028] Figure 8 is a schematic overall structural diagram of the filter with low port delay in Embodiment 2 of the present utility model;

[0029] Figure 9 is a three-dimensional view of the high and low impedances in Embodiment 2 of the present utility model;

[0030] Figure 10 is a front view of the high and low impedances in Embodiment 2 of the present utility model.

[0031] In the drawings, the reference numerals represent:

[0032] 1. First low-impedance antibody 2. Second low-impedance antibody 3. Third low-impedance antibody 4. Fourth low-impedance antibody 5. Fifth low-impedance antibody 6. First high-impedance antibody 7. Second high-impedance antibody 8. Third high-impedance antibody 9. Fourth high-impedance antibody 10. Transmission sheet. Detailed implementation mode

[0033] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying equal importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0036] Embodiment 1:

[0037] Refer to Figure 2-5 , in this embodiment, the filter with low port delay includes: a plurality of low-impedance structures and a plurality of high-impedance structures, the low-impedance structures are arranged alternately with the low-impedance structures, and the cross-sectional area of each low-impedance structure is greater than or less than the cross-sectional area of the adjacent low-impedance structure.

[0038] The length of each high-impedance structure is greater than or less than the length of an adjacent high-impedance structure. The thickness of each high-impedance structure is greater than or less than the thickness of an adjacent high-impedance structure. By changing the cross-sectional area of the low-pass, the port impedance value can be changed. Furthermore, by changing the size and shape of the high and low impedances of the low-pass, the port delay of the filter can be enhanced, and the filter can obtain excellent standing wave performance.

[0039] The low-impedance structure in this embodiment includes a first low-impedance body 1, a second low-impedance body 2, a third low-impedance body 3, a fourth low-impedance body 4, and a fifth low-impedance body 5 arranged in sequence; the high-impedance structure includes a first high-impedance body 6, a second high-impedance body 7, a third high-impedance body 8, and a fourth high-impedance body 9 arranged in sequence, where the first high-impedance body 6 is disposed between the first low-impedance body 1 and the second low-impedance body 2, the second high-impedance body 7 is disposed between the second low-impedance body 2 and the third low-impedance body 3, the third high-impedance body 8 is disposed between the third low-impedance body 3 and the fourth low-impedance body 4, and the fourth high-impedance body 9 is disposed between the fourth low-impedance body 4 and the fifth low-impedance body 5.

[0040] The first high-impedance body 6, the second high-impedance body 7, the third high-impedance body 8, and the fourth high-impedance body 9 are all cylindrical. The first low-impedance body 1, the second low-impedance body 2, the third low-impedance body 3, the fourth low-impedance body 4, and the fifth low-impedance body 5 are all cuboid.

[0041] The cross-sectional area of the first high-impedance body 6 is smaller than the cross-sectional area of the second high-impedance body 7, the cross-sectional area of the second high-impedance body 7 is larger than the cross-sectional area of the third high-impedance body 8, and the cross-sectional area of the third high-impedance body 8 is smaller than the cross-sectional area of the fourth high-impedance body 9. The cross-sectional area of the first high-impedance body 6 is equal to the cross-sectional area of the third high-impedance body 8, and the cross-sectional area of the second high-impedance body 7 is equal to the cross-sectional area of the fourth high-impedance body 9.

[0042] The length of the first high-impedance body 6 is less than the length of the second high-impedance body 7, the length of the second high-impedance body 7 is equal to the length of the third high-impedance body 8, and the length of the third high-impedance body 8 is greater than the length of the fourth high-impedance body 9. The length of the first high-impedance body 6 is equal to the length of the fourth high-impedance body 9.

[0043] The widths of the first low-impedance body 1, the second low-impedance body 2, the third low-impedance body 3, the fourth low-impedance body 4, and the fifth low-impedance body 5 are all equal; the length of the first low-impedance body 1 is less than the length of the second low-impedance body 2, the length of the second low-impedance body 2 is equal to the length of the fourth low-impedance body 4, the length of the third low-impedance body 3 is less than the length of the first low-impedance body 1, and the length of the fifth low-impedance body 5 is equal to the length of the first low-impedance body 1.

[0044] The thickness of the first low-impedance antibody 1 is less than that of the second low-impedance antibody 2. The thickness of the second low-impedance antibody 2 is equal to that of the fourth low-impedance antibody 4. The thickness of the third low-impedance antibody 3 is greater than that of the second low-impedance antibody 2. The thickness of the fifth low-impedance antibody 5 is equal to that of the first low-impedance antibody 1.

[0045] See Figure 7 , in this embodiment, by optimizing the sizes and shapes of the low-impedance structure and the high-impedance structure, a port delay of 3.5 ns can be easily achieved, the port delay is increased by 6 ns, and the comprehensive performance of the filter is made more excellent.

[0046] Embodiment 2:

[0047] See Figure 8-10 , the low-impedance structure in this embodiment includes the first low-impedance antibody 1, the second low-impedance antibody 2, the third low-impedance antibody 3, the fourth low-impedance antibody 4, and the fifth low-impedance antibody 5 arranged in sequence; the high-impedance structure includes the first high-impedance antibody 6, the second high-impedance antibody 7, the third high-impedance antibody 8, and the fourth high-impedance antibody 9 arranged in sequence, where the first high-impedance antibody 6 is arranged between the first low-impedance antibody 1 and the second low-impedance antibody 2, the second high-impedance antibody 7 is arranged between the second low-impedance antibody 2 and the third low-impedance antibody 3, the third high-impedance antibody 8 is arranged between the third low-impedance antibody 3 and the fourth low-impedance antibody 4, and the fourth high-impedance antibody 9 is arranged between the fourth low-impedance antibody 4 and the fifth low-impedance antibody 5.

[0048] In this embodiment, the diameter of the first high-impedance antibody 6 is equal to that of the third high-impedance antibody 8, the diameter of the second high-impedance antibody 7 is equal to that of the fourth high-impedance antibody 9, and the diameter of the first high-impedance antibody 6 is less than that of the second high-impedance antibody 7.

[0049] The first low-impedance antibody 1, the second low-impedance antibody 2, the third low-impedance antibody 3, the fourth low-impedance antibody 4, and the fifth low-impedance antibody 5 are all cuboids. And in this embodiment, the lengths and widths of the first low-impedance antibody 1, the second low-impedance antibody 2, the third low-impedance antibody 3, the fourth low-impedance antibody 4, and the fifth low-impedance antibody 5 are equal, but the thicknesses are not equal. The thicknesses of the first low-impedance antibody 1 and the fifth low-impedance antibody 5 are equal, the thicknesses of the second low-impedance antibody 2 and the fourth low-impedance antibody 4 are equal, the thickness of the first low-impedance antibody 1 is less than that of the second low-impedance antibody 2, and the thickness of the second low-impedance antibody 2 is less than that of the third low-impedance antibody 3.

[0050] In this embodiment, the filter can also achieve the purpose of enhancing the port delay by adjusting the sizes of the high and low impedances.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A filter with low port delay, comprising a plurality of low-impedance structures and a plurality of high-impedance structures, the low-impedance structures and the high-impedance structures being alternately arranged, characterized in that, The cross-sectional area of each of the low-impedance structures is greater than or less than the cross-sectional area of an adjacent one of the low-impedance structures.

2. The filter with low port delay according to claim 1, characterized in that The length of each of the high-impedance structures is greater than or less than the length of an adjacent one of the high-impedance structures.

3. The filter with low port delay according to claim 1 or 2, characterized in that, The thickness of each of the high-impedance structures is greater than or less than the thickness of an adjacent one of the high-impedance structures.

4. The filter with low port delay according to claim 1, characterized in that, The low-impedance structure includes a first low-impedance antibody, a second low-impedance antibody, a third low-impedance antibody, a fourth low-impedance antibody, and a fifth low-impedance antibody arranged in sequence. The high-impedance structure includes a first high-impedance antibody, a second high-impedance antibody, a third high-impedance antibody, and a fourth high-impedance antibody arranged in sequence, wherein the first high-impedance antibody is disposed between the first low-impedance antibody and the second low-impedance antibody, the second high-impedance antibody is disposed between the second low-impedance antibody and the third low-impedance antibody, the third high-impedance antibody is disposed between the third low-impedance antibody and the fourth low-impedance antibody, and the fourth high-impedance antibody is disposed between the fourth low-impedance antibody and the fifth low-impedance antibody. The cross-sectional area of the first high-impedance antibody is less than the cross-sectional area of the second high-impedance antibody, the cross-sectional area of the second high-impedance antibody is greater than the cross-sectional area of the third high-impedance antibody, and the cross-sectional area of the third high-impedance antibody is less than the cross-sectional area of the fourth high-impedance antibody.

5. The filter with low port delay according to claim 4, characterized in that, The cross-sectional area of the first high-impedance antibody is equal to the cross-sectional area of the third high-impedance antibody, and the cross-sectional area of the second high-impedance antibody is equal to the cross-sectional area of the fourth high-impedance antibody.

6. The filter with low port delay according to claim 4 or 5, characterized in that The first high-impedance antibody, the second high-impedance antibody, the third high-impedance antibody, and the fourth high-impedance antibody are all cylindrical.

7. The filter with low port delay according to claim 4 or 5, characterized in that The length of the first high-impedance antibody is less than the length of the second high-impedance antibody, the length of the second high-impedance antibody is equal to the length of the third high-impedance antibody, and the length of the third high-impedance antibody is greater than the length of the fourth high-impedance antibody.

8. The filter with low port delay according to claim 7, characterized in that The length of the first high-impedance antibody is equal to the length of the fourth high-impedance antibody.

9. The filter with low port delay according to claim 4, wherein The first low-impedance antibody, the second low-impedance antibody, the third low-impedance antibody, the fourth low-impedance antibody, and the fifth low-impedance antibody are all cuboids, and the widths of the first low-impedance antibody, the second low-impedance antibody, the third low-impedance antibody, the fourth low-impedance antibody, and the fifth low-impedance antibody are all equal. The length of the first low-impedance antibody is less than the length of the second low-impedance antibody, the length of the second low-impedance antibody is equal to the length of the fourth low-impedance antibody, the length of the third low-impedance antibody is less than the length of the first low-impedance antibody, and the length of the fifth low-impedance antibody is equal to the length of the first low-impedance antibody.

10. The filter with low port delay according to claim 9, wherein The thickness of the first low-impedance antibody is less than the thickness of the second low-impedance antibody, the thickness of the second low-impedance antibody is equal to the thickness of the fourth low-impedance antibody, the thickness of the third low-impedance antibody is greater than the thickness of the second low-impedance antibody, and the thickness of the fifth low-impedance antibody is equal to the thickness of the first low-impedance antibody.

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