CN217335553U

CN217335553U - High harmonic suppression LC filter

Info

Publication number: CN217335553U
Application number: CN202220787799.3U
Authority: CN
Inventors: 张莹; 吴祖宇; 刘印
Original assignee: Hefei Yunzhiwei Electronic Co ltd
Current assignee: Hefei Yunzhiwei Electronic Co ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-08-30
Anticipated expiration: 2032-04-06

Abstract

The utility model discloses a high harmonic restraines LC wave filter, which comprises a housin, casing one side is equipped with the die cavity, is provided with a plurality of baffles in the die cavity, forms between the baffle and separates the chamber, and each separates the intracavity and all corresponds and install the inductance, is connected with the electric capacity that is located the die cavity inside between two adjacent inductances, and two inductances that are located limit portion all are connected with the pin, and the pin runs through the casing and outwards extends. The utility model discloses simple structure through the structural style who improves the casing, independently separates the inductance through the baffle promptly, reduces the space between inductance and the electric capacity and crosstalks to and the arrangement of the inside inductance electric capacity of metal casing realizes having great suppression to harmonic such as 2, 3 and 4, fine realization high harmonic restraines.

Description

High harmonic suppression LC filter

Technical Field

The utility model relates to a microwave components and parts technical field especially relates to a high harmonic restraines LC wave filter.

Background

The LC filter is a microwave filter composed of a plurality of inductors and capacitors through a certain structure, and the inductors and capacitors are usually formed by arranging and combining a PCB board or a metal housing as a carrier according to a certain sequence.

Existing LC filter implementations typically have two forms:

1. the PCB is used as a carrier, pads of inductors and capacitors are designed on the PCB, the inductors and the capacitors are arranged one by one according to a circuit principle, and the structure of the PCB is shown in figure 1;

2. the metal shell is used as a carrier, and the inductors and the capacitors are arranged in the metal shell one by one according to a circuit principle, and the structure of the inductor and the capacitor is shown in figure 2.

The defects in the

prior schemes

1 and 2 are that space crosstalk exists between inductance and capacitance, and the harmonic suppression of the filter is difficult to realize a larger suppression degree.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a high harmonic suppression LC filter.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a high harmonic restraines LC wave filter, includes the casing, casing one side is equipped with the die cavity, is provided with a plurality of baffles in the die cavity, forms between the baffle and separates the chamber, and each separates the intracavity and all corresponds and installs the inductance, is connected with the electric capacity that is located the die cavity inside between two adjacent inductances, and two inductances that are located limit portion all are connected with the pin, and the pin runs through the casing and outwards extends.

Preferably, the partition is integrally formed with the housing.

Preferably, the shell and the partition plate are both made of metal.

Preferably, a cover is mounted on the top of the housing, and the cover seals the cavity.

Preferably, the plurality of partition plates are arranged at equal intervals, and the partition plates are perpendicular to the bottom in the cavity.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses simple structure through the structural style who improves the casing, independently separates the inductance through the baffle promptly, reduces the space between inductance and the electric capacity and crosstalks to and the arrangement of the inside inductance electric capacity of metal casing realizes having great suppression to harmonic such as 2, 3 and 4, fine realization high harmonic restraines.

Drawings

In order to more particularly and intuitively illustrate an embodiment of the present invention or a prior art solution, a brief description of the drawings needed for use in the description of the embodiment or the prior art will be provided below.

Fig. 1 is a structure diagram of a filter in which inductors and capacitors are arranged one by one according to a circuit principle, with a PCB board as a carrier;

fig. 2 is a structure diagram of a filter in which inductors and capacitors are arranged one by one according to a circuit principle, using a metal housing as a carrier;

fig. 3 is a schematic structural diagram of the filter proposed by the present invention;

FIG. 4 is a diagram of a simulation result of a 7-order filter manufactured by using a PCB as a carrier and designing a pad of an inductor and a capacitor on the PCB;

fig. 5 is a simulation result diagram of a 7-order filter manufactured by arranging inductors and capacitors in a metal shell one by one according to a circuit principle by using the metal shell as a carrier.

In the figure: the device comprises a shell 1, a partition plate 2, a separation cavity 3, pins 4, a cavity 5, a capacitor 6 and an inductor 7.

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.

Referring to fig. 3, a high harmonic suppression LC filter includes a housing 1, a cavity 5 is provided at one side of the housing 1, a plurality of partition plates 2 are provided in the cavity 5, a partition cavity 3 is formed between the partition plates 2, an inductor 7 is correspondingly installed in each partition cavity 3, a capacitor 6 located inside the cavity 5 is connected between two adjacent inductors 7, two inductors 7 located at the edge are connected with a pin 4, and the pin 4 penetrates through the housing 1 and extends outward.

In this embodiment,

baffle

2 and 1 integrated into one piece of casing improve the structural wholeness, and the material of casing 1 and baffle 2 is the metal, has better intensity.

In this embodiment, the closing cap is installed at the top of casing 1, and the closing cap seals cavity 5, improves the leakproofness, and equidistant setting between a plurality of baffles 2, and baffle 2 and cavity 5 bottom vertical setting.

Referring to fig. 4, a simulation result diagram of a 7 th order filter manufactured by using a PCB as a carrier and designing pads of an inductor and a capacitor on the PCB is shown, and it can be seen from the simulation result that the suppression of the second harmonic is very large, namely, the suppression is-49.08 db (1000MHz), and the suppression of the fourth harmonic refers to suppression 57.44db (2000 MHz).

Referring to fig. 5, a simulation result diagram of a 7 th order filter manufactured by arranging inductors and capacitors in a metal shell one by one according to a circuit principle by using the metal shell as a carrier can be seen from the simulation result that the suppression of the second harmonic is very large, namely, the suppression is-85 db (1000MHz), and the suppression of the fourth harmonic is 92.25db (2000 MHz).

Referring to fig. 5, the simulation result of the 7 th order filter manufactured by the scheme shows that each index of the 7 th order filter is better than that of the conventional realization form, namely, the 7 th order filter has good inhibition on the second, third and fourth harmonics, and a novel solution is provided for special application occasions.

In the present case, through improving the structural style of casing 1, separate inductance 7 independently through baffle 2 promptly to and the arrangement of metal casing internal inductance electric capacity realize having great suppression to 2, 3 and 4 etc. harmonics, fine realization high harmonic suppression.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a high harmonic restraines LC filter, includes casing (1), its characterized in that, casing (1) one side is equipped with die cavity (5), is provided with a plurality of baffles (2) in die cavity (5), forms between baffle (2) and separates chamber (3), and each separates and all corresponds in chamber (3) and installs inductance (7), is connected with between two adjacent inductance (7) and is located inside electric capacity (6) of die cavity (5), and two inductance (7) that are located limit portion all are connected with pin (4), and pin (4) run through casing (1) and outwards extend.

2. A harmonic rejection LC filter according to claim 1, wherein said partition (2) is integrally formed with the housing (1).

3. A harmonic rejection LC filter according to claim 2, wherein said housing (1) and said partition (2) are both made of metal.

4. A harmonic rejection LC filter according to claim 3, wherein a cover is mounted on top of the housing (1) and encloses the cavity (5).

5. A harmonic rejection LC filter according to claim 4, wherein said plurality of said partitions (2) are arranged at equal intervals, and said partitions (2) are arranged perpendicular to the bottom of the cavity (5).