Power amplification cavity filtering integrated device

Abstract

The utility model discloses a power amplification cavity filtering integrated device, which relates to the technical field of filtering and comprises a metal shell and a cover body, one end of the metal shell is provided with a radio frequency coaxial input interface, the other end of the metal shell is provided with a radio frequency coaxial output interface, a connecting plate is fixedly arranged in the middle of an inner cavity of the metal shell, and one surface of the connecting plate is connected with a power amplification circuit board. A cavity filter assembly is arranged on the other face of the power amplifier circuit board, the cavity filter assembly and the connecting plate are integrally formed, and an electronic element is arranged on the power amplifier circuit board. The power amplifier and the cavity filter are integrated through special structural design, the occupied internal space of the whole machine is reduced, the structural design is compact, the size is small, the universality is high, meanwhile, normal work of the cavity filter is guaranteed, and the power amplifier has good market popularization prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering, in particular to a power amplifier cavity filtering integrated device. Background Art

[0002] Under the increasingly stringent electromagnetic compatibility requirements, a cavity filter must be installed to perform high rectangular coefficient filtering on the RF signal after being amplified by the power amplifier. The existing method is to connect the power amplifier output and the cavity filter through a cable, which will take up too much internal space of the whole machine, have poor matching, and increase power loss. The power amplifier and the cavity filter cannot be superimposed and combined rigidly, and the stress will cause the cavity filter to deform, greatly deteriorating the filtering characteristics of the cavity filter, and even making it impossible to effectively filter the RF signal. This can only be avoided through special structural design, stress simulation and precision machining.

[0003] Therefore, a power amplifier cavity filter device is provided to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The main purpose of the utility model is to provide a power amplifier cavity filter integrated device, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a power amplifier cavity filter integrated device, including a metal shell and a cover body, a radio frequency coaxial input interface is provided at one end of the metal shell, and a radio frequency coaxial output interface is provided at the other end, a connecting plate is fixedly provided in the middle of the inner cavity of the metal shell, one side of the connecting plate is connected to a power amplifier circuit board, and the other side is provided with a cavity filter assembly, the cavity filter assembly and the connecting plate are integrally formed, and electronic components are provided on the power amplifier circuit board.

[0006] Further preferably, the cavity-filter assembly comprises a plurality of parallel coaxial single cavities, each of the coaxial single cavity being composed of a cavity, a resonance rod, a tuning screw and an additional plate, the resonance rod being placed inside the cavity, the end of the resonance rod being connected to a tuning screw, and the additional plate being connected to the end of the cavity.

[0007] Preferably, the RF coaxial input interface is connected to the input end of the power amplifier circuit board, the output end of the power amplifier circuit board is connected to the input end of the cavity filter component, and the output end of the cavity filter component is connected to the RF coaxial output interface.

[0008] Preferably, the metal shell, connecting plate and cavity filter assembly are made by CNC machining.

[0009] Preferably, the metal shell is made of 6061 aluminum, the outer surface of the metal shell is provided with a gold-plated layer, and the inner surface is provided with a 10um silver-plated layer.

[0010] Preferably, the cavity filter assembly and the connecting plate are made of 6061-T6 aluminum alloy or H62 brass and are silver-plated on the surface.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The utility model integrates the power amplifier and the cavity filter into one through a special structural design, which reduces the internal space occupied by the whole machine. The structure design is compact, the volume is small, and the versatility is strong. At the same time, the normal operation of the cavity filter is ensured, and it has a good market promotion prospect.

[0013] 2. The utility model increases the resonance amount and the rectangular coefficient of the filter by arranging an additional disk on the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the coaxial single-cavity structure of the utility model.

[0016] In the figure: 1-metal casing; 2-RF coaxial input interface; 3-RF coaxial output interface; 4-connecting board; 5-power amplifier circuit board; 6-coaxial single cavity; 7-cover; 601-cavity; 602-resonance rod; 603-tuning screw; 604-adding plate. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but is not intended to limit the present invention. Any technical solution based on the transformation or inference of the present invention falls within the protection scope of the present invention.

[0018] like Figure 1 As shown, an embodiment of the utility model provides an integrated power amplifier cavity filter device, including a metal shell 1 and a cover body 7. A radio frequency coaxial input interface 2 is provided at one end of the metal shell 1, and a radio frequency coaxial output interface 3 is provided at the other end. A connecting plate 4 is fixedly provided in the middle of the inner cavity of the metal shell 1. One side of the connecting plate 4 is connected to a power amplifier circuit board 5, and the other side is provided with a cavity filter assembly. The cavity filter assembly and the connecting plate 4 are integrally formed, and electronic components are provided on the power amplifier circuit board 5.

[0019] It should be noted that the cavity filter assembly is integrated with the connecting plate 4, and a power amplifier circuit board 5 is connected to the other side of the connecting plate 4, and the power amplifier circuit board 5 is connected to the electronic components and circuits commonly used in the power amplifier; compared with the rigid superposition and combination of the power amplifier and the cavity filter, this method has no connection stress and will not affect the cavity filter. It reduces the excessive internal space of the whole machine while ensuring the normal operation of the cavity filter, and has good market promotion prospects.

[0020] In an optional embodiment of the present invention, Figure 2 As shown, the cavity-filter assembly includes several parallel coaxial single cavities 6, each coaxial single cavity 6 is composed of a cavity 601, a resonance rod 602, a tuning screw 603 and an additional plate 604, the resonance rod 602 is placed inside the cavity 601, the end of the resonance rod 602 is connected to the tuning screw 603, and the additional plate 604 is connected to the end of the cavity 601.

[0021] It should be noted that the basic structure of the cavity-filter assembly is a coaxial single cavity 6, which is coupled step by step through the air cavity between the cavities 601. The coupling amount between the single cavities is adjusted by changing the distance between the single cavities. At the same time, the tuning screw 603 performs a certain amount of coupling error adjustment, and the top is added with a disk 604 to reduce the frequency, enhance the resonance amount, and increase the rectangular coefficient of the filter.

[0022] In an optional embodiment of the present utility model, the RF coaxial input interface 2 is connected to the input end of the power amplifier circuit board 5, the output end of the power amplifier circuit board 5 is connected to the input end of the cavity filter component, and the output end of the cavity filter component is connected to the RF coaxial output interface 3.

[0023] In an optional embodiment of the utility model, the metal shell 1, the connecting plate 4 and the cavity filter assembly are made by CNC machining. The higher the suppression degree requirement, the higher the requirement for machining accuracy. CNC machining is used to meet the machining accuracy requirement.

[0024] In an optional embodiment of the present invention, the metal shell 1 is made of 6061 aluminum, the outer surface of the metal shell 1 is provided with a gold plating layer, and the inner surface is provided with a 10um silver plating layer. In order to meet the requirements of suppression degree and loss, a suitable plating thickness is required.

[0025] In an optional embodiment of the utility model, the cavity filter assembly and the connecting plate 4 are made of 6061-T6 aluminum alloy or H62 brass and are silver-plated on the surface to reduce the impact of temperature excursion on the loss at the passband edge and out-of-band suppression under high and low temperature extreme temperature conditions.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A power amplifier cavity filter integrated device, comprising a metal housing (1) and a cover (7), wherein one end of the metal housing (1) is provided with a radio frequency coaxial input interface (2), and the other end is provided with a radio frequency coaxial output interface (3), characterized in that: A connecting plate (4) is fixedly provided in the middle of the inner cavity of the metal shell (1); one side of the connecting plate (4) is connected to a power amplifier circuit board (5); and the other side is provided with a cavity filter assembly; the cavity filter assembly and the connecting plate (4) are integrally formed; and electronic components are provided on the power amplifier circuit board (5).

2. The power amplifier cavity filter integrated device according to claim 1, characterized in that: The cavity filter assembly comprises a plurality of parallel coaxial single cavities (6), each of the coaxial single cavities (6) comprising a cavity (601), a resonant rod (602), a tuning screw (603) and an additional disk (604), the resonant rod (602) being placed inside the cavity (601), the end of the resonant rod (602) being connected to the tuning screw (603), and the additional disk (604) being connected to the end of the cavity (601).

3. The power amplifier cavity filter integrated device according to claim 2, characterized in that: The radio frequency coaxial input interface (2) is connected to the input end of the power amplifier circuit board (5), the output end of the power amplifier circuit board (5) is connected to the input end of the cavity filter component, and the output end of the cavity filter component is connected to the radio frequency coaxial output interface (3).

4. The power amplifier cavity filter integrated device according to claim 1, characterized in that: The metal housing (1), the connecting plate (4) and the cavity filter assembly are manufactured by CNC machining.

5. The power amplifier cavity filter integrated device according to any one of claims 1 to 4, characterized in that: The metal shell (1) is made of 6061 aluminum material, the outer surface of the metal shell (1) is provided with a gold-plated layer, and the inner surface is provided with a 10 um silver-plated layer.

6. The power amplifier cavity filter integrated device according to any one of claims 1 to 4, characterized in that: The cavity filter assembly and the connecting plate (4) are made of 6061-T6 aluminum alloy or H62 brass and are silver-plated on the surface.

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