A filter cavity structure for frequency synthesis module

Abstract

The present invention discloses a filter cavity structure for a frequency synthesis module, comprising a first cover plate, a cavity, a second cover plate and a tuning screw; the two sides of the cavity are respectively connected to the first cover plate and the second cover plate, through holes are provided at both ends of the cavity, cavities are provided thereon, a number of conical resonance columns are provided in the cavity, and a number of first mounting holes are provided on both sides of the cavity; the number of the tuning screws is the same as the number of the resonance columns, and an inverted conical groove matching the conical resonance columns is provided thereon, and each tuning screw is connected to a corresponding resonance column through a connecting hole. The present invention solves the problem of the traditional filter resonant disk being too large by providing a number of resonance columns, and the thickness direction is small. The present invention has a simple structure and can effectively reduce the size of the filter, making the width direction smaller, and provides a miniaturized filter cavity structure for a frequency synthesis module.

Description

Technical Field

[0001] The invention belongs to the field of filtering structures, and in particular relates to a filter cavity structure for a frequency synthesis module. Background Art

[0002] The frequency synthesis module is the core component of the RF transceiver system. With the development of electronic information technology and the application of chip micro-assembly technology, the filter volume is required to be reduced. The filter volume is related to the frequency, and it is of practical significance to reduce the volume of the lower frequency filter. The traditional filter is large in size and is not suitable for the use conditions of the existing frequency synthesis module: the resonator size of the traditional filter is too large, resulting in a large width direction; the traditional filter has an oversized resonant disk, so it is large in thickness. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a filter cavity structure for a frequency synthesis module, which solves the problems existing in traditional filters.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a filter cavity structure for a frequency synthesis module, comprising a first cover plate, a cavity, a second cover plate and a tuning screw;

[0005] The two sides of the cavity are connected to the first cover plate and the second cover plate respectively, the two ends of the cavity are provided with through holes, a cavity is provided thereon, a plurality of conical resonant columns are provided in the cavity, and a plurality of first mounting holes are provided on both sides of the cavity;

[0006] The number of the tuning screws is the same as the number of the resonant columns, and an inverted conical groove matching the conical resonant column is arranged on the tuning screws. Each tuning screw is connected to a corresponding resonant column through a connecting hole.

[0007] Furthermore, the first cover plate is provided with a plurality of second mounting holes, and the second mounting holes are connected to the first mounting holes on one side of the cavity by screws in a one-to-one correspondence;

[0008] The second cover plate is provided with a plurality of third mounting holes, and the third mounting holes are connected to the first mounting holes on the other side of the cavity by screws in a one-to-one correspondence.

[0009] Furthermore, the diameter of the tuning screw is consistent with the diameter of the connecting hole.

[0010] The beneficial effects of the present invention are:

[0011] (1) The present invention connects the first cover plate, the cavity and the second cover plate together by a plurality of screws, and the structure is firm.

[0012] (2) The present invention solves the problem of the traditional filter resonant disk being too large by providing a plurality of resonant columns, and the thickness direction is smaller.

[0013] (3) The present invention has a simple structure and can effectively reduce the size of the filter, making it smaller in the width direction, thereby providing a miniaturized filter cavity structure for a frequency synthesis module. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a filter cavity structure for a frequency synthesis module in the present invention;

[0015] Figure 2 A top view of the cavity in the present invention;

[0016] Among them: 1-first cover plate, 2-cavity, 3-second cover plate, 4-tuning screw, 5-resonance column, 6-connecting hole, 7-first mounting hole, 8-second mounting hole, 9-third mounting hole. DETAILED DESCRIPTION

[0017] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0018] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a filter cavity structure for a frequency synthesis module includes a first cover plate 1, a cavity 2, a second cover plate 3 and a tuning screw 4;

[0020] The two sides of the cavity 2 are connected to the first cover plate 1 and the second cover plate 3 respectively. Through holes are provided at both ends of the cavity 2, and a cavity is provided thereon. A plurality of conical resonant columns 5 are provided in the cavity. A plurality of first mounting holes 7 are provided on both sides of the cavity 2.

[0021] The number of the tuning screws 4 is the same as the number of the resonant columns 5 , and an inverted conical groove matching the conical resonant columns 5 is provided on the tuning screws 4 . Each tuning screw 4 is connected to a corresponding resonant column 5 via a connecting hole 6 .

[0022] The first cover plate 1 is provided with a plurality of second mounting holes 8, and the second mounting holes 8 are connected to the first mounting holes 7 on one side of the cavity 2 by screws in a one-to-one correspondence;

[0023] The second cover plate 3 is provided with a plurality of third mounting holes 9 , and the third mounting holes 9 are connected to the first mounting holes 7 on the other side of the cavity 2 in a one-to-one correspondence through screws.

[0024] The diameter of the tuning screw 4 is consistent with the diameter of the connecting hole 6 .

[0025] The working principle of the present invention is: the tuning screws 4 are connected to the resonant columns 5 in a one-to-one correspondence, the first cover plate 1, the cavity 2 and the second cover plate 3 are connected in sequence, and the filter cavity structure is installed in the frequency synthesis module for filtering.

[0026] The beneficial effects of the present invention are:

[0027] (1) The present invention connects the first cover plate, the cavity and the second cover plate together by a plurality of screws, and the structure is firm.

[0028] (2) The present invention solves the problem of the traditional filter resonant disk being too large by providing a plurality of resonant columns, and the thickness direction is smaller.

[0029] (3) The present invention has a simple structure and can effectively reduce the size of the filter, making it smaller in the width direction, thereby providing a miniaturized filter cavity structure for a frequency synthesis module.

Claims

1. A filter cavity structure for a frequency synthesis module, characterized in that: It comprises a first cover plate (1), a cavity (2), a second cover plate (3) and a tuning screw (4); The two sides of the cavity (2) are connected to the first cover plate (1) and the second cover plate (3) respectively; through holes are provided at both ends of the cavity (2); a cavity is provided thereon; a plurality of conical resonant columns (5) are provided in the cavity; and a plurality of first mounting holes (7) are provided on both sides of the cavity (2); The number of the tuning screws (4) is the same as the number of the resonant columns (5), and an inverted conical groove matching the conical resonant columns (5) is provided on the tuning screws (4), and each tuning screw (4) is connected to a corresponding resonant column (5) via a connecting hole (6); a plurality of second mounting holes (8) are provided on the first cover plate (1), and the second mounting holes (8) are connected to the first mounting holes (7) on one side of the cavity (2) in a one-to-one correspondence via screws; a plurality of third mounting holes (9) are provided on the second cover plate (3), and the third mounting holes (9) are connected to the first mounting holes (7) on the other side of the cavity (2) in a one-to-one correspondence via screws; the diameter of the tuning screws (4) is consistent with the diameter of the connecting holes (6).

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