High-power radio frequency power amplifier module based on power tube

Abstract

The utility model belongs to the technical field of power amplifier equipment, and particularly relates to a high-power radio frequency power amplifier module based on a power tube, which comprises a module body, a connecting port is arranged in the middle of the top and the bottom of the module body, the power tube is arranged in the module body, the drain voltage of the power tube is 28V, and the grid voltage of the power tube is 2.2 V. A radio frequency power amplifier circuit jointly built by a matching circuit, a bias circuit and a power tube device is arranged in the mounting piece, and the matching circuit adopts a serial strip line and a parallel capacitor to match an impedance point to 50 omega; the module body is internally provided with a power supply module which provides drain electrode and grid electrode voltage for the three-stage radio frequency power amplifier and provides voltage for the power detection chip and the control circuit. The radio frequency power amplifier is provided with the matching circuit matched with the radio frequency power amplifier circuit, the matching circuit adopts a serial strip line and a parallel capacitor to match an impedance point to 50 omega, and a small amount of loss can be generated when a signal passes through the matching circuit.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power amplifier equipment technical field, specifically relates to the high -power radio frequency power amplifier module based on power tube. BACKGROUND

[0002] Power tube is the key element in electronic circuit, mainly undertakes the last stage of circuit high -power output task, can be divided into high -power tube and small -power tube according to collector power consumption, common types include triode, field effect tube, thyristor etc., its core function is to realize high current output through composite structure, and power tube is the core element of high -power radio frequency power amplifier module.

[0003] The inside of high -power radio frequency power amplifier module will generally be set up the matching circuit matched with high -power radio frequency power amplifier circuit, and the traditional matching circuit will exist certain loss when signal passes through the matching circuit, and the matching circuit produces more reflection signal when radio frequency signal passes through the matching circuit, leads to signal to have certain loss, and the performance of matching circuit is poor. The utility model discloses a high -power radio frequency power amplifier module based on power tube, can make radio frequency signal produce a small amount of reflection signal when signal passes through the matching circuit and has a small amount of loss, improve the performance of matching circuit.

[0004] The utility model discloses a high -power radio frequency power amplifier module based on power tube, can make radio frequency signal produce a small amount of reflection signal when signal passes through the matching circuit and has a small amount of loss, improve the performance of matching circuit.

[0005] The utility model discloses the technical scheme specifically as follows:

[0006] High -power radio frequency power amplifier module based on power tube, including module body, the middle position of the top and bottom of module body is provided with connecting port, the inside of module body is provided with power tube, and the drain voltage of power tube is 28V, and the gate voltage is 2.2V, and the inside of mounting piece is provided with radio frequency power amplifier circuit that is jointly built by matching circuit, bias circuit power tube device;

[0007] The matching circuit adopts series band line and parallel capacitor to match the impedance point to 50Ω.

[0008] In a preferred scheme, the inside of the module body is provided with a power module for providing drain and gate voltage for the three-stage radio frequency power amplifier and providing voltage for the power detection chip and control circuit, in the power module, the drain voltage of the radio frequency power amplifier is 28V direct current voltage, the 28V direct current voltage is output as 8V direct current voltage through linear voltage stabilizer LM317, the 8V direct current voltage is output as 5V direct current voltage through linear voltage stabilizer LM78L05, Vgs1 and Vgs2 are the gate voltage of power amplifier through series and parallel resistance, and 5V direct current voltage is output direct current voltage 3.3V through linear voltage stabilizer LM117 and is powered for control circuit.

[0009] In a preferred embodiment, a mounting sheet is arranged on the back of the module body, and screw holes for connecting fixing screws are arranged at the four corners of the mounting sheet.

[0010] In a preferred embodiment, a plurality of heat dissipation grooves are arranged on the back of the mounting sheet at equal intervals.

[0011] In a preferred embodiment, a first rubber gasket ring protruding from the surface of the mounting sheet is arranged at the edge of the back of the mounting sheet, a first connecting block is arranged at the top and the bottom of the first rubber gasket ring away from the middle position of the side of the mounting sheet, a second rubber gasket ring is arranged on the back of the first rubber gasket ring through the first connecting block, and a gap exists between the second rubber gasket ring and the first rubber gasket ring due to the presence of the first connecting block.

[0012] In a preferred embodiment, a dustproof filter screen is arranged between the gap between the first rubber gasket ring and the second rubber gasket ring.

[0013] In a preferred embodiment, the dustproof filter screen is a flexible filter screen and has a left-right split structure, opposite ends of the split structure are fixedly connected with a second connecting block, the position of the second connecting block corresponds to the position of the first connecting block, a second magnetic block is fixedly arranged on the side of the second connecting block close to the first connecting block, a first magnetic block is fixedly arranged on the side of the first connecting block close to the second connecting block, the polarities of the first magnetic block and the second magnetic block are opposite, and the first magnetic block and the second magnetic block are attracted to each other.

[0014] The technical effects achieved by the utility model are as follows:

[0015] The utility model is provided with a matching circuit matched with the radio frequency power amplifier circuit, the matching circuit matches the impedance point to 50Ω by using a series band line and a parallel capacitor, a small amount of loss occurs when a signal passes through the matching circuit, a small amount of reflected signal is generated when the radio frequency signal passes through the matching circuit, and the performance of the matching circuit is improved.

[0016] Since a gap exists between the first rubber gasket ring (6) and the second rubber gasket ring (7), a gap exists between the back of the module and the side wall of the installation position after the module is installed, air flows more easily at the back of the module, heat dissipation at the back of the module is more convenient, the heat dissipation capacity and effect of the back of the module are improved, and the service life of the module is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the utility model;

[0018] Figure 2 is a back structure schematic diagram of the utility model;

[0019] Figure 3 is a position schematic diagram of the heat dissipation groove of the utility model;

[0020] Figure 4 is the connection position diagram of the first connecting block of the utility model;

[0021] Figure 5 is the utility model Figure 2 A place of the enlarged view in the middle;

[0022] Figure 6 is the utility model Figure 3 B place of the enlarged view in the middle;

[0023] Figure 7 is the utility model Figure 4 C place of the enlarged view in the middle;

[0024] Figure 8 is the utility model input (a) / output (b) matching circuit circuit diagram;

[0025] Figure 9 is the utility model RF power amplifier principle diagram;

[0026] Figure 10 is the utility model power module circuit diagram.

[0027] In the drawing, the component list represented by each mark is as follows:

[0028] 1, mounting piece;

[0029] 2, module body;

[0030] 3, screw hole;

[0031] 4, heat dissipation slot;

[0032] 5, connecting port;

[0033] 6, first rubber grommet; 7, second rubber grommet; 8, first connecting block; 9, first magnetic block; 10, second connecting block; 11, second magnetic block; 12, dustproof filter screen. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purpose, features and advantages of the utility more obvious and easy to understand, the specific embodiments of the utility are described in detail below with the drawings of the specification.

[0035] In the following description, a lot of specific details are set forth in order to fully understand the utility, but the utility can also be implemented in other ways different from the description herein, and those skilled in the art can make similar generalization without departing from the connotation of the utility, therefore the utility is not limited by the specific embodiments disclosed below.

[0036] Secondly, the "one embodiment" or "embodiment" referred to herein is intended to mean a specific feature, structure, or characteristic under at least one implementation of the utility. "In one preferred embodiment" appearing in various places in the specification are not all directed to the same embodiment, nor are they necessarily mutually exclusive of other embodiments.

[0037] Thirdly, the utility is described in detail in conjunction with the schematic diagram. In the detailed description of the utility embodiments, the sectional view of the device structure is partially enlarged without the general proportion for the convenience of illustration, and the schematic diagram is only an example, which should not limit the scope of protection of the utility. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in the actual manufacture.

[0038] Please refer to the accompanying Figures 8 to 10 The utility provides a high-power radio frequency power amplifier module based on a power tube, which comprises a module body 2, a connecting port 5 is arranged at the middle position of the top and the bottom of the module body 2, a power tube is arranged in the module body 2, the model of the power tube is DS38S010P, the drain voltage of the power tube is 28V, the gate voltage is 2.2V, and the breakdown voltage of the power tube is about 68V. In order to protect the power tube from being damaged during work, the drain voltage VDS is set to be less than twice the breakdown voltage, so the drain voltage of the radio frequency power amplifier is set to 28V, and the gate voltage is set to 2.2V, so as to balance the linearity and efficiency, and make the second-stage radio frequency power amplifier work in AB class. At this time, the static current is 100mA, and a radio frequency power amplifier circuit is arranged in the inside of the mounting sheet 1, which is jointly built by a matching circuit, a bias circuit and a power tube device.

[0039] The matching circuit adopts a series band line and a parallel capacitor to match the impedance point to 50Ω.

[0040] The above structure, the setting of the matching circuit, can cause a small amount of loss when the signal passes through the matching circuit, so that a small amount of reflected signal is generated when the radio frequency signal passes through the matching circuit, and the performance of the matching circuit is improved.

[0041] In one preferred embodiment, please refer to Figure 10 A power module is arranged in the inside of the module body 2, which provides the drain and gate voltages for the three-stage radio frequency power amplifier and provides the voltages for the power detection chip and the control circuit. In the power module, the drain voltage of the radio frequency power amplifier is a direct current voltage of 28V, the direct current voltage of 28V is output as a direct current voltage of 8V through a linear voltage stabilizer LM317, the direct current voltage of 8V is output as a direct current voltage of 5V through a linear voltage stabilizer LM78L05, the direct current voltage of 5V is obtained as the gate voltage of the power amplifier through series and parallel resistors, and the direct current voltage of 5V is output as a direct current voltage of 3.3V through a linear voltage stabilizer LM117 and is used for power supply of the control circuit.

[0042] Secondly, please refer to Figure 1 Also includes the installation sheet 1 set in the back of the module body 2, the installation sheet 1 four corners are provided with screw holes 3 for connecting the fixed screw.

[0043] The above structure, when the module is installed, the module can be installed and fixed at the corresponding position by the fixed screw through the screw hole 3.

[0044] Thirdly, please refer to Figure 2 The back of the installation sheet 1 is provided with a plurality of heat dissipation through grooves 4 penetrating the inside of the installation sheet 1.

[0045] The above structure, after the module is installed, the back of the module can be easily cooled by the heat dissipation through groove 4, and the heat dissipation effect of the back of the module is improved.

[0046] In a preferred embodiment, please refer to Figure 2 And Figure 4 The edge of the back of the installation sheet 1 is fixedly provided with a first rubber gasket ring 6 protruding from the surface of the installation sheet 1, and the top and bottom of the first rubber gasket ring 6 are fixedly provided with a first connecting block 8 at the middle position away from the installation sheet 1. The back of the first rubber gasket ring 6 is fixedly provided with a second rubber gasket ring 7 through the first connecting block 8, and due to the existence of the first connecting block 8, there is a gap between the second rubber gasket ring 7 and the first rubber gasket ring 6.

[0047] In this embodiment, when the module is installed, the first rubber gasket ring 6 and the second rubber gasket ring 7 protruding from the surface of the installation sheet 1 are in contact with the installation position. Because there is a gap between the first rubber gasket ring 6 and the second rubber gasket ring 7, there is a gap between the back of the module and the side wall of the installation position after the module is installed, which is more convenient for air to flow in the back of the module, thereby more convenient for the heat dissipation of the back of the module, improving the heat dissipation capacity and effect of the back of the module, and further improving the service life of the module.

[0048] Secondly, please refer to Figure 2 And Figure 3 The gap between the first rubber gasket ring 6 and the second rubber gasket ring 7 is provided with a dustproof filter screen 12.

[0049] The above structure can reduce the probability of dust covering the back of the module through the protection of the dustproof filter screen 12, thereby further improving the heat dissipation effect of the back of the module.

[0050] Thirdly, please refer to Figures 2 to 7The dustproof filter screen 12 is a flexible filter screen and has a split structure, and opposite ends of the split structure are fixedly connected with second connecting blocks 10, two second connecting blocks 10 at the same height are not connected, and the positions of the second connecting blocks 10 correspond to the positions of the first connecting blocks 8, one side of each second connecting block 10 close to the first connecting block 8 is fixedly provided with a second magnetic block 11, and one side of the first connecting block 8 close to the second connecting block 10 is fixedly provided with a first magnetic block 9, the polarities of the first magnetic block 9 and the second magnetic block 11 are opposite, and the first magnetic block 9 and the second magnetic block 11 are adsorbed to each other.

[0051] In the embodiment, when the dustproof filter screen 12 needs to be thoroughly cleaned or replaced, the first magnetic block 9 and the second magnetic block 11 adsorbed to each other are separated, the dustproof filter screen 12 is detached from the gap between the first rubber gasket ring 6 and the second rubber gasket ring 7, and the dustproof filter screen 12 is thoroughly cleaned or replaced, so that the dustproof filter screen 12 is prevented from being completely blocked by dust, the ventilation capacity of the dustproof filter screen 12 is ensured, and the heat dissipation effect of the back of the module is further improved.

[0052] The utility model discloses a working principle is: the inside of this high -power radio frequency power amplifier module is provided with the matching circuit that matches with high -power radio frequency power amplifier circuit, and matching circuit adopts series band line and parallel capacitance and then matches impedance point to 50Omega, makes radio frequency signal produce less reflected signal when passing through matching circuit, improves the performance of matching circuit, and the performance of matching circuit is better;

[0053] When the high -power radio frequency power amplifier module installs, generally through fixed screw and installs in corresponding position, after installing, the back of module is generally close to the one side of installation position, this based on power tube's high -power radio frequency power amplifier module installs in corresponding position through fixed screw, because the back of mounting sheet 1 is provided with the first rubber gasket ring 6 and second rubber gasket ring 7 that protrude from the surface of mounting sheet 1, and there is a gap between the first rubber gasket ring 6 and the second rubber gasket ring 7, so that there is a gap between the back of mounting sheet 1 and the installation position after installation, so that air can flow to the back of mounting sheet 1, through the heat dissipation through groove 4 of the back of mounting sheet 1, the back of module is convenient for heat dissipation;

[0054] The first rubber gasket ring 6 and the second rubber gasket ring 7 are provided with a dustproof filter screen 12, which filters dust in the air, reduces the probability of dust in the air adhering to the back of the module, and improves the heat dissipation capacity of the back of the module.

[0055] At the same time, since the dustproof filter screen 12 has a flexible structure, and the second connecting block 10 at the end of the dustproof filter screen 12 is adsorbed to the gap between the first rubber gasket ring 6 and the second rubber gasket ring 7 through the cooperation of the first magnetic block 9 and the second magnetic block 11, when the dustproof filter screen 12 needs to be thoroughly cleaned or replaced, the dustproof filter screen 12 can be directly taken out from the gap between the second rubber gasket ring 7 and the first rubber gasket ring 6.

[0056] The above are only preferred embodiments of the present utility, it should be pointed out that, for those skilled in the ordinary technical personnel in this technology, without departing from the principle of the present utility, can also make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present utility. The structure, device and operation method not specifically described and explained in the present utility, such as no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A high power radio frequency power amplifier module based on power tubes, characterized in that: Including module body (2), the module body (2) is provided with connecting port (5) at the middle position of top and bottom, the inside of module body (2) is provided with power tube, and the drain voltage of power tube is 28V, and the gate voltage is 2.2V, and the inside of mounting sheet (1) is provided with the radio frequency power amplifier circuit jointly built by matching circuit, bias circuit power tube device; The matching circuit adopts series band line and parallel capacitor to match the impedance point to 50Ω.

2. The power tube based high power radio frequency power amplifier module of claim 1, wherein: The inside of module body (2) is provided with the power module for providing drain and gate voltage for three-stage radio frequency power amplifier and providing voltage for power detection chip and control circuit, in the power module, the drain voltage of radio frequency power amplifier is 28V direct current, 28V direct current is output as 8V direct current through linear voltage stabilizer LM317, 8V direct current is output as 5V direct current through linear voltage stabilizer LM78L05, 5V direct current is obtained through series and parallel resistance Vgs1, Vgs2 for the gate voltage of power amplifier, 5V direct current is output direct current 3.3V through linear voltage stabilizer LM117 and is used to power control circuit.

3. The power tube based high power radio frequency power amplifier module of claim 1, wherein: It also includes mounting sheet (1) provided on the back of module body (2), screw holes (3) for connecting fixing screws are formed at the four corners of mounting sheet (1).

4. The power tube based high power radio frequency power amplifier module of claim 1, wherein: The back of mounting sheet (1) is provided with a plurality of heat dissipation through slots (4) penetrating the inside of mounting sheet (1) at equal intervals.

5. The power tube based high power radio frequency power amplifier module of claim 1, wherein: The edge of the back of mounting sheet (1) is fixedly provided with a first rubber gasket ring (6) protruding from the surface of mounting sheet (1), a first connecting block (8) is fixedly arranged at the top and bottom of the middle position of the side of first rubber gasket ring (6) away from mounting sheet (1), a second rubber gasket ring (7) is fixedly arranged on the back of first rubber gasket ring (6) through first connecting block (8), and due to the existence of first connecting block (8), there is a gap between second rubber gasket ring (7) and first rubber gasket ring (6).

6. The power tube based high power radio frequency power amplifier module of claim 5, wherein: A dustproof filter screen (12) is arranged between the gap between first rubber gasket ring (6) and second rubber gasket ring (7).

7. The power tube based high power radio frequency power amplifier module of claim 6, wherein: The dustproof filter screen (12) is a flexible filter screen and has a left-right split structure, the opposite ends of the left-right split structure are fixedly connected with a second connecting block (10), the position of second connecting block (10) corresponds to the position of first connecting block (8), a second magnetic block (11) is fixedly arranged on the side of second connecting block (10) close to first connecting block (8), and a first magnetic block (9) is fixedly arranged on the side of first connecting block (8) close to second connecting block (10), the polarities of first magnetic block (9) and second magnetic block (11) are opposite and are mutually adsorbed.

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