CN115986357A - Power synthesis amplifier module - Google Patents

Abstract

The invention discloses a power synthesis amplifier module. It includes: a top cover, a base, at least two antenna board single card components, a pulse modulation unit and a connection unit; the base, the antenna board single card component and the top cover are sequentially stacked and combined to form a waveguide body. The side surface of the waveguide body forms a rectangular waveguide opening; the pulse modulation unit is arranged on the side adjacent to the side surface, and the antenna board single card assembly includes a tray, an antenna board and at least two amplification units; the Both the antenna board and the amplifying unit are arranged in the first groove of the tray, and the amplifying unit is arranged on the side of the antenna board close to the pulse modulation unit; the pulse modulation unit is connected to the pulse modulation unit through the connection unit The control terminal of the amplifying unit is connected; the technical solution provided by the present invention prevents the accuracy of the modulation voltage input from being too long, and effectively reduces the transmission delay of the effective edge of the amplifying unit.

Description

A power synthesis amplifier module

technical field

Embodiments of the present invention relate to the technical field of radio frequency microwave power amplifiers, in particular to a power synthesis amplifier module.

Background technique

In the field of radio frequency and microwave technology, microwave pulse power amplifier is an indispensable part. In recent years, solid-state microwave power devices have developed rapidly, gradually replacing the previous bulky, low reliability, and short-lived traveling wave tube amplifiers. Among them, semiconductor solid-state microwave The device has the characteristics of small size, light weight and high stability. However, the biggest disadvantage of solid-state microwave power devices is that the output power is relatively low. In order to obtain high-power microwaves, it is often necessary to use power combining.

In the traditional waveguide-based power combining active array, when multiple power amplifiers are installed at the same time, due to the limited size of the standard waveguide, there are certain problems in the heat dissipation of the power amplifier. In the power supply modulation process, the modulation accuracy is often affected due to the long connection line between the two.

Contents of the invention

The invention provides a power synthesizing amplifier module, which prevents the accuracy of modulating voltage input from being affected by too long lines, and effectively reduces the transmission delay of the effective edge of the amplifying unit.

An embodiment of the present invention provides a power synthesizing amplifier module, including: a top cover, a base, at least two antenna board single card assemblies, a pulse modulation unit and a connection unit;

The base, the antenna board single card assembly and the top cover are sequentially stacked and combined to form a waveguide body, and the side surface of the waveguide body forms a rectangular waveguide opening after combination;

The pulse modulation unit is arranged on one side of the adjacent side surface of the side surface, and the antenna board single card assembly includes a tray, an antenna board and at least two amplifying units; the antenna board and the amplifying unit are both arranged on In the first groove of the tray, wherein the antenna board is connected to the amplifying unit, and the amplifying unit is arranged on the side of the antenna board close to the pulse modulation unit; the pulse modulation unit is connected by The unit is connected to the control terminal of the amplification unit; the pulse modulation unit is used to generate a power pulse modulation signal; the antenna board single card assembly is used to amplify the microwave power according to the pulse modulation signal, and output the amplified power pulse signal .

Optionally, the tray includes a second groove, the second groove is disposed on the back surface of the antenna board single card assembly; the vertical projection of the second groove covers at least the next layer of the tray on the amplification unit.

Optionally, the second groove is filled with absorbing material.

Optionally, the connection units corresponding to the control ends of the amplifying units in each of the antenna board single card assemblies are arranged in a row in the combination direction of the waveguide bodies.

Optionally, the amplifying unit is a monolithic microwave power amplifier, and the control terminal includes a drain terminal and a gate terminal, wherein the connection unit corresponding to the drain terminal and the connection unit corresponding to the gate terminal are in The same antenna board single card assembly is arranged in a row; the connection units corresponding to the drain terminals are arranged in a row in the combination direction of the waveguide body, and the connection units corresponding to the gate terminal are combined in the waveguide body Arranged in a row in the direction.

Optionally, the power synthesis amplifier module includes at least four antenna board single card components;

Wherein, the length dimension of the antenna board provided in the antenna board single card assembly adjacent to the top cover, and the antenna board provided in the antenna board single card assembly adjacent to the base The length dimensions of the antenna boards are the same; the dimensions of the antenna boards set in the other antenna board single card components are the same, and are smaller than the length dimensions of the antenna boards set in the antenna board single card components adjacent to the top cover .

Optionally, the cross-sectional dimension of the rectangular waveguide port is 22.86mm*10.16mm.

Optionally, at least two locking pins are provided on the surface of each tray, and grooves capable of accommodating the locking pins are provided at the same position on the opposite surface of each tray.

Optionally, the power synthesizing amplifier module further includes a magnetic ring, and the magnetic ring is arranged between the pulse modulation unit and the connection unit.

Optionally, the power synthesis amplifier module also includes a cooling unit;

The heat dissipation units are respectively arranged on one side of the base and one side of the top cover.

In the technical solution provided by the embodiment of the present invention, impedance matching can be realized by using the antenna plate array, and the synthesis efficiency can be improved accordingly. The pulse modulation unit is arranged on both sides of the waveguide body, and the two amplification units on the same tray The two sides of the antenna board are set opposite to each other and close to the side of the pulse modulation unit, so that the control terminal of the amplifying unit is connected to the output terminal of the pulse modulation unit for short-distance power supply, so as to avoid the influence of the long line on the accuracy of the modulation voltage input and effectively reduce the The propagation delay of the active edge of the amplifying unit.

Description of drawings

FIG. 1 is a schematic structural diagram of a power synthesis amplifier module provided by an embodiment of the present invention.

Fig. 2 is a schematic diagram of an exploded structure of a power synthesis amplifier module provided by an embodiment of the present invention.

Fig. 3 is a partial structural schematic diagram of a power synthesis amplifier module provided by an embodiment of the present invention.

Fig. 4 is a hierarchical schematic diagram of a partial structure of a power synthesis amplifier module provided by an embodiment of the present invention.

FIG. 5 is a schematic structural diagram of the back of an antenna board single card assembly provided by an embodiment of the present invention.

FIG. 6 is a schematic diagram of a board diagram of a pulse modulation unit provided by an embodiment of the present invention.

FIG. 7 is a schematic diagram of a pulse modulation driving circuit provided by an embodiment of the present invention.

Fig. 8 is a schematic diagram of the pulse voltage without a magnetic ring.

Fig. 9 is a schematic diagram of the pulse voltage of the magnetic ring.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a power synthesizing amplifier module provided by an embodiment of the present invention, Fig. 2 is a schematic diagram of an exploded structure of a power synthesizing amplifier module provided by an embodiment of the present invention, and Fig. 3 is a schematic diagram of a power synthesizing amplifier module provided by an embodiment of the present invention A schematic diagram of a partial structure of a power synthesizing amplifier module. FIG. 4 is a hierarchical schematic diagram of a partial structure of a power synthesizing amplifier module provided by an embodiment of the present invention. Referring to FIGS. 1-4, the power synthesizing amplifier module includes: a top cover 7, a base 5, At least two antenna board single card components 6, a pulse modulation unit 2 and a connection unit 11;

The base 5, the antenna board single card assembly 6 and the top cover 7 are sequentially stacked and combined to form a waveguide body 1, and the side surface of the waveguide body 1 after combination forms a rectangular waveguide opening;

The pulse modulation unit 2 is arranged on one side of the adjacent side surface of the side surface, and the antenna board single card assembly 6 includes a tray 16, an antenna board 14 and at least two amplifying units; the antenna board 14 and the amplifying unit are all arranged on the first concave of the tray. In the groove, wherein, the antenna board 14 is connected with the amplifying unit 13, and the amplifying unit 13 is arranged on the side of the antenna board 14 close to the pulse modulation unit 2; the pulse modulation unit 2 is connected with the control terminal of the amplifying unit 13 through the connection unit 11; the pulse modulation The unit 2 is used to generate a power pulse modulation signal; the antenna board single card assembly 6 is used to amplify the microwave power according to the pulse modulation signal, and output the amplified power pulse signal.

Specifically, according to the size of the rectangular waveguide, multiple antenna board single card assemblies 6 can be stacked between the top cover 7 and the base 5 , and the antenna board single card assembly 6 consists of a tray 16 , an antenna board 14 and an amplification unit 13 . The tray 16 of each stacked antenna board single card assembly 6 has the same shape and size, the tray 16 is used to carry the antenna board 14 and the amplification unit 13, and the front surface of the tray 16 is provided with a first groove, which can accommodate the placement of the antenna board 14 and the amplifier unit 13. After the amplification unit 13 and the waveguide opening on the side surface of each tray 16 are stacked and combined, the size of the formed waveguide opening should be the same as that of the required rectangular waveguide opening. Wherein, the rectangular waveguide port on one side is used as the radio frequency input terminal RF IN, and the rectangular waveguide port on the other side is used as the radio frequency output terminal RF OUT. , the pulse modulation unit 2 is arranged on the side adjacent to the rectangular waveguide mouth, correspondingly, the amplifying unit 13 is arranged in the tray 16 close to the side adjacent to the rectangular waveguide opening, and the control end of the amplifying unit 13 is connected to the connection unit 11, The connection unit 11 extends to the side surface of the tray 16 to facilitate electrical connection with the output end of the pulse modulation unit 2 on one side. Exemplarily, mounting holes and bosses 17 are provided on the edge of the side surface of the base 5, top cover 7 and the pulse modulation unit 2 on the same side, and a certain avoidance space can be formed with the pulse modulation unit 2 by using the boss 17, which can be The components on the pulse modulation unit 2 are avoided, and the connection circuit between the connection unit 11 and the pulse modulation unit 2 can also be avoided. In order not to affect the heat dissipation of the amplifying unit 13, the amplifying units 13 in the same tray 16 are arranged oppositely, so the pulse modulation units 2 are respectively arranged on the adjacent side surfaces on both sides of the rectangular waveguide opening of the waveguide main body 1, so as to input to the amplifying unit 13 Power pulse modulation signal.

Exemplary, the working process of the power synthesis amplifier module is to convert the energy of the rectangular waveguide port into the energy on the antenna board 14. Exemplarily, the antenna board 14 can be a fin line microstrip transition antenna board 14, and the antenna board 14 is used The array is easy to achieve impedance matching in a very wide frequency band, which can correspondingly improve the synthesis efficiency. The amplifying unit 13 itself is a heat source, so two amplifying units 13 on the same tray 16 can be arranged opposite to each other on both sides of the antenna board 14 to facilitate heat dissipation. The pulse modulation unit 2 is arranged on both sides of the waveguide body 1 to allow power supply The connection distance is the shortest. Exemplarily, the pulse modulation method of the amplifying unit 13 adopts drain modulation, the pulse modulation unit 2 adopts the shortest distance side output, and the control terminal of the amplifying unit 13 is directly connected to the output of the pulse modulation unit 2 through the connection unit 11. Terminal connection, so that the control terminal of the amplifying unit 13 is connected with the output terminal of the pulse modulation unit 2 for short-distance power supply, thereby improving the accuracy of the modulation voltage input and reducing the transmission delay of the effective edge of the amplifying unit 13. Wherein, the connection unit 11 may be a glass insulator.

In the technical solution provided by the embodiment of the present invention, impedance matching can be realized by using the antenna plate array, and the synthesis efficiency can be improved accordingly. The pulse modulation unit is arranged on both sides of the waveguide body, and the two amplification units on the same tray The two sides of the antenna board are set opposite to each other and close to the side of the pulse modulation unit, so that the control terminal of the amplifying unit is connected to the output terminal of the pulse modulation unit for short-distance power supply, so as to avoid the influence of the long line on the accuracy of the modulation voltage input and effectively reduce the The propagation delay of the active edge of the amplifying unit.

Fig. 5 is a schematic structural diagram of the back of an antenna board single card assembly provided by an embodiment of the present invention. Referring to the figure, optionally, the tray 16 includes a second groove 18, and the second groove 18 is arranged on the antenna board single card assembly. On the back surface of the card assembly 6 ; the vertical projection of the second groove 18 covers at least the magnifying unit 13 on the next tray 16 .

Specifically, the surface of the tray 16 carrying the amplification unit 13 and the antenna board 14 is the first surface, and the surface opposite to the first surface is the back surface. In the stacking combination, the tray 16 of the upper antenna board single card assembly 6 is the first The surface is stacked adjacent to the back surface of the lower antenna board single card assembly 6, so after the second groove 18 is set on the back surface, the second groove 18 will form a cavity with the antenna board single card assembly 6 of the lower layer, and the cavity Covering the amplifying unit 13 of the antenna board single card assembly 6 on the lower layer, the amplifying unit 13 and the connection circuit between the amplifying unit 13 and the pulse modulation unit 2 can be avoided, and a certain heat dissipation space is formed by using the cavity.

Optionally, the second groove 18 is filled with absorbing material. Specifically, a wave-absorbing material may be filled or pasted above the corresponding amplifying unit 13 of the second groove 18, and the wave-absorbing material is used to suppress self-excitation of the amplifier and prevent microwave resonance from occurring.

Continuing to refer to FIG. 3 , optionally, the connection units 11 corresponding to the control ends of the amplifying units 13 in each antenna board single card assembly 6 are arranged in a row in the combination direction of the waveguide main body 1 .

Specifically, the antenna board single card assembly 6 is stacked and combined, and the control terminals of each amplifying unit 13 at the same position are on the same side, and are arranged in a row in the direction of stacking, which is convenient for the neat layout of the output terminals of the pulse modulation unit 2. The output ends of the modulating units 2 are arranged in a row at the corresponding installation positions, and can form the same short-distance connection line with each amplifying unit 13 .

Continue referring to FIG. 3 and FIG. 4 , optionally, the amplifying unit 13 is a monolithic microwave power amplifier, and the control terminal includes a drain terminal VD and a gate terminal VG, wherein the connection unit 11 corresponding to the drain terminal VD is connected to the corresponding connection unit 11 to the gate terminal VG The units 11 are arranged in a row in the same antenna board single card assembly 6; the connection units 11 corresponding to the drain terminals VD are arranged in a row in the combination direction of the waveguide body 1, and the connection units 11 corresponding to the gate terminal VG are arranged in a row in the combination direction of the waveguide body 1 .

Specifically, the drain terminal VD and the gate terminal VG of the monolithic microwave power amplifier respectively extend to the side surface of the tray 16 through the connecting unit 11, wherein the drain terminal VD and the gate terminal VG of the same monolithic microwave power amplifier are in a row Arranged, the connection unit 11 corresponding to the drain terminal VD of the single-chip microwave power amplifier in the same position of the stacked antenna board single card assembly 6 is on the same line, and the same, the connection unit 11 corresponding to the gate terminal VG is on the same line. Fig. 6 is a schematic diagram of a pulse modulation unit provided by an embodiment of the present invention, wherein the electrode 20 connected to the gate terminal VG is adaptively merged into one electrode, and the electrode 21 connected to the drain terminal VD is adaptively merged into one place electrode. Therefore, the single-chip microwave power amplifiers on the same side of the stacked antenna board single card assembly 6 can share one drive circuit, thereby saving the drive chip circuit of the pulse modulation unit 2, saving the volume of the circuit board, reducing the cost, and facilitating installation. Fig. 7 is a schematic diagram of a circuit principle of a pulse modulation drive provided by an embodiment of the present invention. Refer to Fig. 7. Exemplarily, the drive chip U27 of the pulse modulation drive circuit is LTC4440, and the pulse logic level is generated by the drive chip and sent to the amplification unit 13. Provides a pulse modulated signal. Exemplarily, the pulse modulation unit 2 can also integrate functions such as current detection, temperature detection and CAN communication, so as to improve the extended application of the power synthesis amplifier.

Continue to refer to FIG. 4, optionally, the power synthesis amplifier module includes at least four antenna board single card components 6;

Wherein, the length dimension of the antenna board 14 arranged in the antenna board single card assembly 6 adjacent to the top cover 7 is the same as the length dimension of the antenna board 141 arranged in the antenna board single card assembly 6 adjacent to the base 5; The size of the antenna board 142 provided in the antenna board single card assembly 6 is the same, and is smaller than the length dimension of the antenna board 141 provided in the antenna board single card assembly 6 adjacent to the top cover 7 .

Specifically, as an example, each antenna board single card assembly 6 uses two discharge units, and the amplified power of each amplifying unit 13 is 50W, then four groups of antenna board single card assemblies 6, the synthesizable power can reach 400W above. The size of the antenna is related to the frequency, and the combining efficiency of radio frequency and microwave can be improved by combining the antenna boards 14 with different sizes. Wherein, the antenna boards 141 in the two antenna board single card assemblies 6 near the base 5 and the top cover 7 of the waveguide body 1 stacked and combined are of the same size, that is, the antennas of the antenna board single card assemblies 6 whose housing numbers are 1 and 5 The size of the boards 141 is the same, and the size of the antenna board 14 in the antenna board single card assembly 6 stacked in the middle is the same, that is, the size of the antenna board 142 of the antenna board single card assembly 6 with the shell number 3-4 is the same, and it is smaller than the antennas on both sides. Board 141 size, so as to form a combined structure of antenna board length and length, and in order to further improve the efficiency of radio frequency power synthesis, a phase adjuster 13 can be set in the antenna board 142 of the antenna board single card assembly 6 stacked in the middle, through the phase The adjuster 13 adjusts the phases of the short antenna plate 142 and the long antenna plate 141 to be equal in phase.

Optionally, the cross-sectional dimension of the rectangular waveguide port is 22.86mm*10.16mm.

Specifically, the waveguide corresponding to the rectangular waveguide port in the embodiment of the present invention is WR-90, the cross-sectional size of the rectangular waveguide port is 22.86 mm*10.16 mm, and the specified working range is from 8.2 GHz to 12.4 GHz.

4 and 5, optionally, at least two locking pins 15 are provided on the surface of each tray 16, and grooves capable of accommodating the locking pins 15 are provided at the same position on the opposite surface of each tray 16. 19.

Specifically, at least two locking pins 15 are arranged on the surface edge of each antenna board single card assembly 6, and the locking pins are protruding structures, and a groove 19 is provided at the same position on the back of the antenna board single card assembly 6, which can accommodate the lower layer The locking pin 15, so the stacked combination of the antenna board single card components 6 can be mutually locked, avoiding the uneven synthesis of the multi-layer antenna board single card components 6, resulting in displacement deviation.

Optionally, the power synthesizing amplifier module further includes a magnetic ring, and a magnetic ring is provided between the pulse modulation unit 2 and the connection unit 11 .

Specifically, a magnetic ring is placed between the drain terminal VD and the glass insulator. For example, the magnetic ring type is NXP-1000, and the voltage overshoot problem can be greatly improved by using the magnetic ring. Figure 8 shows the pulse without the magnetic ring Voltage schematic diagram, Figure 9 is a schematic diagram of the pulse voltage of the magnetic ring. It can be observed that there is an overshoot of the rising edge of the pulse without the magnetic ring, and the rising edge of the pulse becomes gentle after the magnetic ring is added.

Optionally, the power synthesizing amplifier module further includes a heat dissipation unit 3; the heat dissipation unit 3 is respectively arranged on one side of the base 5 and one side of the top cover 7.

Specifically, installation holes are respectively provided on the surface of the base 5 and the top cover 7 of the waveguide body 1 for installing the heat dissipation unit 3. The heat dissipation unit 3 can be a structure such as a metal heat sink. The overall structure of the power synthesis amplifier module is compact, which improves the power synthesis. The heat dissipation area of the amplifier module. Wherein, a temperature sensing module 4 can be arranged on the cooling unit 3, and connected with the temperature detection unit 22 integrated with the pulse modulation unit 2, so as to monitor the operating temperature of the power synthesis amplifier module.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A power synthesizing amplifier module, comprising: a top cover, a base, at least two antenna board single card assemblies, a pulse modulation unit and a connection unit; The base, the antenna board single card assembly and the top cover are sequentially stacked and combined to form a waveguide body, and the side surface of the waveguide body forms a rectangular waveguide opening after combination; The pulse modulation unit is arranged on one side of the adjacent side surface of the side surface, and the antenna board single card assembly includes a tray, an antenna board and at least two amplifying units; the antenna board and the amplifying unit are both arranged on In the first groove of the tray, wherein the antenna board is connected to the amplifying unit, and the amplifying unit is arranged on the side of the antenna board close to the pulse modulation unit; the pulse modulation unit is connected by The unit is connected to the control terminal of the amplification unit; the pulse modulation unit is used to generate a power pulse modulation signal; the antenna board single card assembly is used to amplify the microwave power according to the pulse modulation signal, and output the amplified power pulse signal . 2. The power synthesis amplifier module according to claim 1, wherein the tray includes a second groove, and the second groove is arranged on the back surface of the antenna board single card assembly; the first groove The vertical projection of the two grooves at least covers the amplification unit on the tray of the next layer. 3. The power synthesis amplifier module according to claim 2, characterized in that, the second groove is filled with a wave-absorbing material. 4. The power synthesizing amplifier module according to claim 1, wherein the connecting unit corresponding to the control end of the amplifying unit in each antenna board single card assembly is in the direction of combining the waveguide body Arranged in a column. 5. The power synthesizing amplifier module according to claim 4, wherein the amplifying unit is a monolithic microwave power amplifier, and the control terminal includes a drain terminal and a gate terminal, wherein the drain terminal corresponds to the The connecting unit and the connecting unit corresponding to the gate terminal are arranged in a row in the same antenna board single card assembly; the connecting units corresponding to the drain terminal are arranged in a row in the direction of combining the waveguide main body, the The connection units corresponding to the gate terminals are arranged in a row in the combination direction of the waveguide bodies. 6. The power synthesizing amplifier module according to any one of claims 1-5, characterized in that, comprising at least four antenna board single card assemblies; Wherein, the length dimension of the antenna board provided in the antenna board single card assembly adjacent to the top cover, and the antenna board provided in the antenna board single card assembly adjacent to the base The length dimensions of the antenna boards are the same; the dimensions of the antenna boards set in the other antenna board single card components are the same, and are smaller than the length dimensions of the antenna boards set in the antenna board single card components adjacent to the top cover . 7. The power synthesizing amplifier module according to claim 6, wherein the cross-sectional size of the rectangular waveguide opening is 22.86mm*10.16mm. 8. The power synthesizing amplifier module according to any one of claims 1-5, characterized in that, at least two locking pins are arranged on the surface of each said tray, and at least two locking pins are arranged on the opposite surface of each said tray. A groove capable of accommodating the locking pin is provided at the same position. 9. The power synthesizing amplifier module according to claim 1, further comprising a magnetic ring, the magnetic ring is arranged between the pulse modulation unit and the connection unit. 10. The power synthesizing amplifier module according to claim 1, further comprising a cooling unit; The heat dissipation units are respectively arranged on one side of the base and one side of the top cover.

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