CN108091970B - Ka-band broadband high-power amplifier - Google Patents
Ka-band broadband high-power amplifier Download PDFInfo
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- CN108091970B CN108091970B CN201711308210.7A CN201711308210A CN108091970B CN 108091970 B CN108091970 B CN 108091970B CN 201711308210 A CN201711308210 A CN 201711308210A CN 108091970 B CN108091970 B CN 108091970B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
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Abstract
The embodiment of the invention discloses a Ka-band broadband high-power amplifier, which comprises: the power amplifier comprises a first-stage power amplifier module, a second-stage power amplifier module, a third-stage power amplifier module, a first waveguide ET, a second waveguide ET, a first waveguide four-way power divider, a second waveguide four-way power divider, a third waveguide four-way power divider and a fourth waveguide four-way power divider. The power amplifier provided by the invention adopts the waveguide power divider, comprises the waveguide ET and the waveguide four-way power divider, can effectively reduce the synthesis loss, and can obtain larger output power under the condition of the same synthesis scale although the isolation degree is sacrificed. And the power amplifier module adopts a waveguide output form and can be directly connected with a waveguide power combiner (namely a second waveguide ET, a third waveguide four-way power divider and a fourth waveguide four-way power divider), so that the whole structure of the amplifier is simplified, and the cost is effectively controlled.
Description
Technical Field
The invention relates to the field of Ka-band broadband power amplification, in particular to a Ka-band broadband high-power amplifier.
Background
At present, high-power devices based on GaAs and GaN have become the mainstream of civil high-power product development. However, the millimeter wave band is special, the wavelength of the millimeter wave band is very short, the size of the developed MMIC is very small, and the maximum power which can be output by the monolithic MMIC is limited. The development of high power amplifiers operating in the millimeter wave band therefore also requires the use of power combining techniques. Currently, mainstream synthesizer technologies include spatial power synthesis technology, lossy synthesis technology, and lossless synthesis technology.
The lossy synthesis technology can provide a certain degree of isolation for each synthesized device, but because of the existence of resistance components in the synthesizer, when the frequency rises to the millimeter wave band, the loss is very large, and the loss inevitably appears at the output synthesis port, so that the actual synthesis power is reduced.
Disclosure of Invention
The embodiment of the invention provides a Ka-band broadband high-power amplifier, which solves the technical problem of low synthesis power caused by high synthesizer loss in the current lossy synthesis technology.
The embodiment of the invention provides a Ka-band broadband high-power amplifier, which comprises: the power amplifier comprises a first-stage power amplifier module, a second-stage power amplifier module, a third-stage power amplifier module, a first waveguide ET, a second waveguide ET, a first waveguide four-way power divider, a second waveguide four-way power divider, a third waveguide four-way power divider and a fourth waveguide four-way power divider;
the first waveguide ET and the second waveguide ET respectively comprise an input waveguide, a first output waveguide, a second output waveguide and a power distribution structure, the first waveguide ET is used for equally distributing input signals into two paths of output signals, and the second waveguide ET is used for combining the two paths of input signals into one path of output signal;
the output waveguide of the first-stage power amplifier module is connected with the input waveguide of the first waveguide ET;
the first output waveguide of the first waveguide ET is connected with the input waveguide of the first waveguide four-way power divider through the second-stage power amplifier module;
the second output waveguide of the first waveguide ET is connected with the input waveguide of the second waveguide four-way power divider through the second-stage power amplifier module;
four third-pole power amplifier modules are connected between four output waveguides of the first waveguide four-way power divider and four output waveguides of the third waveguide four-way power divider;
four third-pole power amplifier modules are connected between four output waveguides of the second waveguide four-way power divider and four output waveguides of the fourth waveguide four-way power divider;
an input waveguide of the third waveguide four-way power divider is connected with a first output waveguide of the second waveguide ET, and an input waveguide of the fourth waveguide four-way power divider is connected with a second output waveguide of the second waveguide ET;
the output forms of the first-stage power amplifier module, the second-stage power amplifier module and the third-stage power amplifier module are all waveguide output;
the input waveguide of the first-stage power amplifier module is used for inputting a radio frequency signal;
the input waveguide of the second waveguide ET is used for outputting a radio frequency signal.
Preferably, the Ka-band broadband high-power amplifier provided by the embodiment of the invention further comprises a waveguide isolator;
the output end of the first-stage power amplifier module is connected with the input waveguide of the first waveguide ET through the waveguide isolator;
the second-stage power amplifier module and the waveguide isolator are sequentially connected between the first output waveguide of the first waveguide ET and the input waveguide of the first waveguide four-way power divider;
the second-stage power amplifier module and the waveguide isolator are connected between the second output waveguide of the first waveguide ET and the input waveguide of the second waveguide four-way power divider;
the input waveguide of the third waveguide four-way power divider is connected with the first output waveguide of the second waveguide ET through the waveguide isolator, and the input waveguide of the fourth waveguide four-way power divider is connected with the second output waveguide of the second waveguide ET through the waveguide isolator.
Preferably, the first waveguide four-way power splitter includes: a third waveguide ET, a fourth waveguide ET, a fifth waveguide ET, a straight waveguide and a bent waveguide;
the third waveguide ET, the fourth waveguide ET and the fifth waveguide ET comprise an input waveguide, a first output waveguide, a second output waveguide and a power distribution structure;
in the third waveguide ET, the fourth waveguide ET and the fifth waveguide ET, the input waveguide and the first output waveguide, the input waveguide and the second output waveguide are vertically communicated, the first output waveguide and the second output waveguide are horizontally communicated, and the power distribution structure is arranged at the intersection of the input waveguide, the first output waveguide and the second output waveguide;
a bulge is arranged in the middle of the power distribution structure, and two sides of the bulge are stepped and gradually reduced in height and are used for expanding the bandwidth of a signal entering from the input waveguide;
the bottom end of the vertical part of each step is provided with a chamfer;
the first output waveguide of the third waveguide ET is communicated with the input waveguide of the fourth waveguide ET sequentially through the straight-section waveguide and the bent waveguide;
and the second output waveguide of the third waveguide ET is communicated with the input waveguide of the fifth waveguide ET sequentially through the straight waveguide and the bent waveguide.
Preferably, the first output waveguide of the fourth waveguide ET, the second output waveguide of the fourth waveguide ET, the first output waveguide of the fifth waveguide ET and the second output waveguide of the fifth waveguide ET are in the same plane.
Preferably, the first output waveguide of the fourth waveguide ET, the second output waveguide of the fourth waveguide ET, the first output waveguide of the fifth waveguide ET and the second output waveguide of the fifth waveguide ET are all parallel to the input waveguide of the third waveguide ET.
Preferably, the first waveguide four-way power divider, the second waveguide four-way power divider, the third waveguide four-way power divider, and the fourth waveguide four-way power divider have the same structure.
Preferably, the first waveguide ET and the second waveguide ET have the same structure, and the third waveguide ET, the fourth waveguide ET and the fifth waveguide ET have the same structure.
Preferably, the first stage power amplifier module, the second stage power amplifier module and the third stage power amplifier module each include: the microwave integrated circuit comprises a main body, a printed circuit board, gold wires and a single-chip microwave integrated circuit;
the main body is provided with a grounding hole and a channel penetrating through the main body;
the printed circuit board is arranged in the channel;
an input waveguide and an output waveguide are respectively arranged at two ends of the channel;
the grounding hole is used for installing a grounding component;
the monolithic microwave integrated circuit is attached to the center of the printed circuit board and is connected with the antenna of the printed circuit board through the gold wire.
Preferably, the first stage power amplifier module, the second stage power amplifier module and the third stage power amplifier module further include capacitors;
the main body is also provided with a capacitor mounting hole;
the pins of the capacitor penetrate through the capacitor mounting holes and are connected with the power supply island on the printed circuit board, and the pins are used for bypass filtering of the monolithic microwave integrated circuit;
and a groove is arranged in the channel close to the power supply island, so that the pins of the capacitor are connected with the power supply island after being bent.
Preferably, the capacitor is a feedthrough capacitor.
According to the technical scheme, the embodiment of the invention has the following advantages:
the embodiment of the invention provides a Ka-band broadband high-power amplifier, which comprises: the power amplifier comprises a first-stage power amplifier module, a second-stage power amplifier module, a third-stage power amplifier module, a first waveguide ET, a second waveguide ET, a first waveguide four-way power divider, a second waveguide four-way power divider, a third waveguide four-way power divider and a fourth waveguide four-way power divider; the first waveguide ET and the second waveguide ET respectively comprise an input waveguide, a first output waveguide, a second output waveguide and a power distribution structure, the first waveguide ET is used for equally distributing an input signal into two paths of output signals, and the second waveguide ET is used for combining the two paths of input signals into one path of output signal; the output waveguide of the first-stage power amplifier module is connected with the input waveguide of the first waveguide ET; the first output waveguide of the first waveguide ET is connected with the input waveguide of the first waveguide four-way power divider through a second-stage power amplifier module; the second output waveguide of the first waveguide ET is connected with the input waveguide of the second waveguide four-way power divider through a second-stage power amplifier module; four third-pole power amplifier modules are connected between four output waveguides of the first waveguide four-way power divider and four output waveguides of the third waveguide four-way power divider; four third-pole power amplifier modules are connected between four output waveguides of the second waveguide four-way power divider and four output waveguides of the fourth waveguide four-way power divider; the input waveguide of the third waveguide four-way power divider is connected with the first output waveguide of the second waveguide ET, and the input waveguide of the fourth waveguide four-way power divider is connected with the second output waveguide of the second waveguide ET; the output forms of the first-stage power amplifier module, the second-stage power amplifier module and the third-stage power amplifier module are waveguide output; the input waveguide of the first-stage power amplifier module is used for inputting a radio frequency signal; the input waveguide of the second waveguide ET is used for outputting a radio frequency signal.
The power amplifier provided by the invention adopts the waveguide power divider, comprises the waveguide ET and the waveguide four-way power divider, can effectively reduce the synthesis loss, and can obtain larger output power under the condition of the same synthesis scale although the isolation degree is sacrificed. And the power amplifier module adopts a waveguide output form and can be directly connected with a waveguide power combiner (namely a second waveguide ET, a third waveguide four-way power divider and a fourth waveguide four-way power divider), so that the whole structure of the amplifier is simplified, and the cost is effectively controlled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1(a) and fig. 1(b) are schematic structural diagrams of an embodiment of a Ka-band broadband high-power amplifier provided by the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of a Ka-band broadband high-power amplifier provided by the present invention;
fig. 3 is a schematic structural view of a waveguide ET;
FIG. 4 is a schematic structural diagram of a waveguide four-way power splitter;
FIG. 5 is an exploded view of a waveguide four-way power splitter;
FIG. 6 is a schematic view of a bump structure;
fig. 7 is a front view of a power amplifier module;
fig. 8 is an exploded view of a power amplifier module;
fig. 9 is a side view of a power amplifier module.
Detailed Description
The embodiment of the invention provides a Ka-band broadband high-power amplifier, which solves the technical problem of low synthesis power caused by high synthesizer loss in the current lossy synthesis technology.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1(a) and fig. 1(b), an embodiment of a Ka-band broadband high-power amplifier provided by the present invention includes: the power amplifier comprises a first-stage power amplifier module (1), a second-stage power amplifier module (2), a third-stage power amplifier module (3), a first waveguide ET (4), a second waveguide ET (5), a first waveguide four-way power divider (6), a second waveguide four-way power divider (7), a third waveguide four-way power divider (8) and a fourth waveguide four-way power divider (9);
the first waveguide ET (4) and the second waveguide ET (5) respectively comprise an input waveguide, a first output waveguide, a second output waveguide and a power distribution structure, the first waveguide ET (4) is used for equally distributing input signals into two paths of output signals, and the second waveguide ET (5) is used for combining the two paths of input signals into one path of output signal. In this embodiment, the waveguide ET is a three-port device outputting in a waveguide form, and functions as a two-way power divider;
the output waveguide of the first-stage power amplifier module (1) is connected with the input waveguide of a first waveguide ET (4);
the first output waveguide of the first waveguide E (4) T is connected with the input waveguide of the first waveguide four-way power divider (6) through a second-stage power amplifier module (2);
the second output waveguide of the first waveguide ET (4) is connected with the input waveguide of the second waveguide four-way power divider (7) through a second-stage power amplifier module (2);
four third-pole power amplifier modules are connected between four output waveguides of the first waveguide four-way power divider (6) and four output waveguides (8) of the third waveguide four-way power divider;
four third-pole power amplifier modules are connected between four output waveguides of the second waveguide four-way power divider (7) and four output waveguides of the fourth waveguide four-way power divider (9);
the input waveguide of the third waveguide four-way power divider (8) is connected with the first output waveguide of the second waveguide ET (5), and the input waveguide of the fourth waveguide four-way power divider (9) is connected with the second output waveguide of the second waveguide ET (5);
the output forms of the first-stage power amplifier module (1), the second-stage power amplifier module (2) and the third-stage power amplifier module (3) are waveguide output;
the input waveguide of the first-stage power amplifier module (1) is used for inputting a radio frequency signal;
the input waveguide of the second waveguide ET (5) is used to output a radio frequency signal, the radio frequency output being realized in the form of a WR28 waveguide.
It should be noted that, as shown in fig. 1(a) and 1(b), the output waveguides of the third waveguide four-way power divider (8) and the fourth waveguide four-way power divider (9) are used as the input end and the input waveguide is used as the output end in the present power amplifier, and the roles of the input waveguide and the output waveguide of the second waveguide ET (5) are known in the same way, and are not described herein again.
The Ka-band broadband high-power amplifier provided by the invention adopts a three-stage amplification scheme, such as: the gain of the first-stage power amplifier module is 20dB, the output power of P1dB is 24dBm, and when the power amplifier module works actually, the output power of the first-stage power amplifier is about 12dBm and works in a linear region.
The gain of the second-stage power amplifier module is 16dB, the output power of P1dB is 29dBm, and when the second-stage power amplifier module actually works, the output power of a single amplifier module is 28dBm and works in a linear region.
The gain of the third-stage power amplifier module is 12dB, the output power of P1dB is 33dBm, the saturation output power is 34dBm, and the output power of each module is 34dBm during actual operation. Operating in a non-linear region.
The gain of the whole link is 48dB and the output power is 43 dBm. As long as the input power can reach-2 dBm, the radio frequency link can be saturated, and the output power reaches 43 dBm. A common signal source is sufficient to drive this rf link.
The invention can effectively reduce the synthesis loss by adopting the waveguide power divider, and can obtain higher output power under the condition of the same synthesis scale although the isolation degree is sacrificed. And the power amplifier modules of the invention all adopt a waveguide output form and can be directly connected with a lossless synthesizer, thereby reducing the complexity of the whole scheme. Furthermore, the invention can realize the synthesis scale of 8-path synthesis only by adopting 6 waveguide power dividers, and the synthesis configuration of the whole technical scheme is simple.
Compared with the space power synthesis technology, the invention has larger volume, but the assembly process is relatively simple, especially when the problem is solved, the time for replacing the device is less than the time required by the space power synthesis technology, and the requirement on the processing precision of the processing synthesizer is lower.
Compared with the lossy synthesis technology, the invention has less synthesis loss and can obtain larger output power under the condition of the same synthesis scale, and although the lossless synthesis technology has no isolation among each path of synthesis units, under the condition of good standing wave of the input/output port of the power device, the influence caused by no isolation among each path of synthesis units is not large.
Referring to fig. 2, in another embodiment of a Ka-band broadband high-power amplifier provided by the present invention, the Ka-band broadband high-power amplifier may further include: the waveguide isolator (10), the waveguide isolator (10) is used for limiting the unidirectional transmission of signals, preventing the emission, and playing a role in protection;
the output end of the first-stage power amplifier module (1) is connected with the input waveguide of the first waveguide ET (4) through a waveguide isolator;
a second-stage power amplifier module (2) and a waveguide isolator (10) are sequentially connected between a first output waveguide of the first waveguide ET (4) and an input waveguide of the first waveguide four-way power divider (6);
a second-stage power amplifier module (2) and a waveguide isolator (10) are sequentially connected between a second output waveguide of the first waveguide ET (4) and an input waveguide of the second waveguide four-way power divider (7);
the input waveguide of the third waveguide four-way power divider (8) is connected with the first output waveguide of the second waveguide ET (5) through a waveguide isolator (10), and the input waveguide of the fourth waveguide four-way power divider (9) is connected with the second output waveguide of the second waveguide ET (5) through a waveguide isolator.
It should be noted that the high-power amplifier provided by the present invention further includes several waveguides, which are used for transmitting signals. As shown in fig. 1(a), the first waveguide ET (4) and the second stage power amplifier module (2) are connected in sequence through the straight waveguide, the bent waveguide and the straight waveguide, and the large power amplifier has a plurality of positions connected through the waveguides, which is not described herein again.
In this embodiment, referring to fig. 3, the first waveguide ET (4) and the second waveguide ET (5) have the same structure, and are collectively referred to as a waveguide ET, the waveguide ET has a common port and two branch ports, the structural member is composed of a cover plate and a bottom plate, the cover plate has a positioning hole, the bottom plate has a positioning pin, and the cover plate and the bottom plate can be fastened and connected by a cross pan head screw. The three ports can be connected with other waveguide port devices with the same specification through straight waveguides or bent waveguides. The waveguide ET comprises in particular an input waveguide (41), a first output waveguide (42) and a second output waveguide (43) and a power distribution structure (44). The input waveguide (41) serves as a common port, a first output waveguide (42) and a second output waveguide (43) are connected through a power distribution structure (44), and the first output waveguide (42) and the second output waveguide (43) serve as branch ports. The input waveguide (41), the first output waveguide (42) and the second output waveguide (43) constitute a T-shaped structure.
In this embodiment, referring to fig. 4, the first waveguide four-way power divider (6), the second waveguide four-way power divider (7), the third waveguide four-way power divider (8), and the fourth waveguide four-way power divider (9) have the same structure, and here, taking the structure of the first waveguide four-way power divider (6) as an illustration, the four-way power divider includes: a third waveguide ET (61), a fourth waveguide ET (62), a fifth waveguide ET (63), a straight waveguide (64) and a curved waveguide (65);
the third waveguide ET (61), the fourth waveguide ET (62) and the fifth waveguide ET (63) have the same structure. The third waveguide ET (61), the fourth waveguide ET (62) and the fifth waveguide ET (63) have the same structure as the first waveguide ET (4) and the second waveguide ET (5), so that the waveguide four-way power divider can be regarded as a combination of three waveguides ET, a plurality of straight waveguides and a plurality of bent waveguides. Thus, the third, fourth and fifth waveguides ET (61, 62, 63) each comprise an input waveguide (41), a first (42) and a second (43) output waveguide and a power splitting structure;
in the third waveguide ET (61), the fourth waveguide ET (62) and the fifth waveguide ET (63), the input waveguide (41) is vertically communicated with the first output waveguide (42), the input waveguide (41) is horizontally communicated with the second output waveguide (43), and the power distribution structure is arranged at the intersection of the input waveguide (41), the first output waveguide (42) and the second output waveguide (43). The power distribution structure is used for signal power distribution, and distributes an input signal to form a plurality of signal outputs;
referring to fig. 5, a protrusion (66) is disposed in the middle of the power distribution structure, and both sides of the protrusion (66) are stepped and have gradually reduced heights, so as to expand the bandwidth of a signal entering from an input waveguide, and through the expansion of the bandwidth, the working frequency of the waveguide four-way power distributor of the embodiment can cover the entire Ka band of 26.5 to 40 GHz;
referring to fig. 4 to 6, the bottom end of the vertical portion of each step is provided with a chamfer (67), compared with a right-angled step shape, the chamfer (67) structure can be realized, the processing is easy, the size and the shape of the chamfer (67) are not limited, as shown in fig. 6, when the chamfer (67) is large enough, the whole vertical portion of the step is the chamfer (67);
the first output waveguide of the third waveguide ET (61) is communicated with the input waveguide of the fourth waveguide ET (62) through a straight waveguide (64) and a bent waveguide (65) in sequence;
the second output waveguide of the third waveguide ET (61) is communicated with the input waveguide of the fifth waveguide ET (63) through a straight waveguide (64) and a bent waveguide (65) in sequence.
It should be noted that the straight waveguide (64) and the curved waveguide (65) are mainly limited in shape, and specific dimensions may be adjusted according to actual conditions, for example, the dimensions of the straight waveguide (64) connected to both ends of the first output waveguide and the second output waveguide of the third waveguide ET (61) may be the same or different, and the curved waveguide (65) has the same structure, which is not described in detail herein.
In the present embodiment, the first output waveguide (42) of the fourth waveguide ET (62), the second output waveguide (43) of the fourth waveguide ET (62), the first output waveguide (42) of the fifth waveguide ET (63), and the second output waveguide (43) of the fifth waveguide ET (63) are in the same plane.
In this embodiment, the first output waveguide (42) of the fourth waveguide ET (62), the second output waveguide (43) of the fourth waveguide ET (62), the first output waveguide (42) of the fifth waveguide ET (63), and the second output waveguide (43) of the fifth waveguide ET (63) are all parallel to the input waveguide (41) of the third waveguide ET (61).
In this embodiment, referring to fig. 7, fig. 8 and fig. 9, each of the first stage power amplifier module (1), the second stage power amplifier module (2) and the third stage power amplifier module (3) includes: a main body (11), a printed wiring board (12), gold wires, and a monolithic microwave integrated circuit (15);
the main body (11) is provided with a grounding hole (13) and a channel penetrating through the main body, the printed circuit board (12) is arranged in the channel, an input waveguide (17) and an output waveguide (18) are respectively arranged at two ends of the channel, the grounding hole (13) is used for installing a grounding component, the single-chip microwave integrated circuit (15) is attached to the center of the printed circuit board (12) and is connected with an antenna of the printed circuit board (12) through a gold thread.
In this embodiment, each of the first-stage power amplifier module (1), the second-stage power amplifier module (2) and the third-stage power amplifier module (3) further includes a capacitor, and the capacitor is a feedthrough capacitor;
the main body (11) is also provided with a capacitor mounting hole (14), and pins of the capacitor penetrate through the capacitor mounting hole (14) and are connected with a power supply island on the printed circuit board (12) and are used for bypass filtering of the monolithic microwave integrated circuit (15). A groove (16) is arranged in the channel close to the power supply island, so that the pins of the capacitor can be connected with the power supply island after being bent.
It should be noted that, the first-stage power amplifier module (1), the second-stage power amplifier module (2) and the third-stage power amplifier module (3) have similar structures, and the difference between the first-stage power amplifier module and the third-stage power amplifier module is only in function difference, that is, the gains of the three amplifier modules are different, and the gains can be adjusted according to requirements, so that the specifications and parameters of the monolithic microwave integrated circuit and the printed circuit board of the three modules are different, and the channels can also be adjusted in a matching manner according to requirements.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A Ka-band broadband high power amplifier, comprising: the power amplifier comprises a first-stage power amplifier module, a second-stage power amplifier module, a third-stage power amplifier module, a first waveguide ET, a second waveguide ET, a first waveguide four-way power divider, a second waveguide four-way power divider, a third waveguide four-way power divider and a fourth waveguide four-way power divider;
the first waveguide ET and the second waveguide ET respectively comprise an input waveguide, a first output waveguide, a second output waveguide and a power distribution structure, the first waveguide ET is used for equally distributing input signals into two paths of output signals, and the second waveguide ET is used for combining the two paths of input signals into one path of output signal;
the output waveguide of the first-stage power amplifier module is connected with the input waveguide of the first waveguide ET;
the first output waveguide of the first waveguide ET is connected with the input waveguide of the first waveguide four-way power divider through the second-stage power amplifier module;
the second output waveguide of the first waveguide ET is connected with the input waveguide of the second waveguide four-way power divider through the second-stage power amplifier module;
four third-stage power amplifier modules are connected between four output waveguides of the first waveguide four-way power divider and four output waveguides of the third waveguide four-way power divider;
four third-stage power amplifier modules are connected between four output waveguides of the second waveguide four-way power divider and four output waveguides of the fourth waveguide four-way power divider;
an input waveguide of the third waveguide four-way power divider is connected with a first output waveguide of the second waveguide ET, and an input waveguide of the fourth waveguide four-way power divider is connected with a second output waveguide of the second waveguide ET;
the output forms of the first-stage power amplifier module, the second-stage power amplifier module and the third-stage power amplifier module are all waveguide output;
the input waveguide of the first-stage power amplifier module is used for inputting a radio frequency signal;
the input waveguide of the second waveguide ET is used for outputting a radio frequency signal.
2. The Ka-band broadband high power amplifier according to claim 1, further comprising a waveguide isolator;
the output end of the first-stage power amplifier module is connected with the input waveguide of the first waveguide ET through the waveguide isolator;
the second-stage power amplifier module and the waveguide isolator are sequentially connected between the first output waveguide of the first waveguide ET and the input waveguide of the first waveguide four-way power divider;
the second-stage power amplifier module and the waveguide isolator are sequentially connected between the second output waveguide of the first waveguide ET and the input waveguide of the second waveguide four-way power divider;
the input waveguide of the third waveguide four-way power divider is connected with the first output waveguide of the second waveguide ET through the waveguide isolator, and the input waveguide of the fourth waveguide four-way power divider is connected with the second output waveguide of the second waveguide ET through the waveguide isolator.
3. The Ka-band broadband high power amplifier according to claim 1, wherein the first waveguide four-way power splitter comprises: a third waveguide ET, a fourth waveguide ET, a fifth waveguide ET, a straight waveguide and a bent waveguide;
the third waveguide ET, the fourth waveguide ET and the fifth waveguide ET comprise an input waveguide, a first output waveguide, a second output waveguide and a power distribution structure;
in the third waveguide ET, the fourth waveguide ET and the fifth waveguide ET, the input waveguide and the first output waveguide, the input waveguide and the second output waveguide are vertically communicated, the first output waveguide and the second output waveguide are horizontally communicated, and the power distribution structure is arranged at the intersection of the input waveguide, the first output waveguide and the second output waveguide;
a bulge is arranged in the middle of the power distribution structure, and two sides of the bulge are stepped and gradually reduced in height and are used for expanding the bandwidth of a signal entering from the input waveguide;
the bottom end of the vertical part of each step is provided with a chamfer;
the first output waveguide of the third waveguide ET is communicated with the input waveguide of the fourth waveguide ET sequentially through the straight-section waveguide and the bent waveguide;
and the second output waveguide of the third waveguide ET is communicated with the input waveguide of the fifth waveguide ET sequentially through the straight waveguide and the bent waveguide.
4. The Ka-band broadband high power amplifier according to claim 3, wherein the first output waveguide of the fourth waveguide ET, the second output waveguide of the fourth waveguide ET, the first output waveguide of the fifth waveguide ET and the second output waveguide of the fifth waveguide ET are in the same plane.
5. The Ka-band broadband high-power amplifier according to claim 4, wherein the first output waveguide of the fourth waveguide ET, the second output waveguide of the fourth waveguide ET, the first output waveguide of the fifth waveguide ET and the second output waveguide of the fifth waveguide ET are all parallel to the input waveguide of the third waveguide ET.
6. The Ka-band broadband high power amplifier according to claim 5, wherein the first waveguide four-way power splitter, the second waveguide four-way power splitter, the third waveguide four-way power splitter and the fourth waveguide four-way power splitter have the same structure.
7. The Ka-band broadband high-power amplifier according to claim 3, wherein the first waveguide ET and the second waveguide ET have the same structure, and the third waveguide ET, the fourth waveguide ET and the fifth waveguide ET have the same structure.
8. The Ka-band broadband high power amplifier of claim 1, wherein the first stage power amplifier module, the second stage power amplifier module, and the third stage power amplifier module each comprise: the microwave integrated circuit comprises a main body, a printed circuit board, gold wires and a single-chip microwave integrated circuit;
the main body is provided with a grounding hole and a channel penetrating through the main body;
the printed circuit board is arranged in the channel;
an input waveguide and an output waveguide are respectively arranged at two ends of the channel;
the grounding hole is used for installing a grounding component;
the monolithic microwave integrated circuit is attached to the center of the printed circuit board and is connected with the antenna of the printed circuit board through the gold wire.
9. The Ka-band broadband high power amplifier of claim 8, wherein the first stage power amplifier module, the second stage power amplifier module, and the third stage power amplifier module each further comprise a capacitor;
the main body is also provided with a capacitor mounting hole;
the pins of the capacitor penetrate through the capacitor mounting holes and are connected with the power supply island on the printed circuit board, and the pins are used for bypass filtering of the monolithic microwave integrated circuit;
and a groove is arranged in the channel close to the power supply island, so that the pins of the capacitor are connected with the power supply island after being bent.
10. The Ka-band broadband high power amplifier according to claim 9, wherein the capacitor is a feedthrough capacitor.
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| CN201711308210.7A CN108091970B (en) | 2017-12-11 | 2017-12-11 | Ka-band broadband high-power amplifier |
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| CN201711308210.7A CN108091970B (en) | 2017-12-11 | 2017-12-11 | Ka-band broadband high-power amplifier |
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| CN108091970B true CN108091970B (en) | 2020-06-23 |
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| CN114865260A (en) * | 2021-02-04 | 2022-08-05 | 广州程星通信科技有限公司 | Power synthesizer applied to Q/V frequency band |
| CN116826341B (en) * | 2023-08-29 | 2023-12-01 | 四川中久防务科技有限公司 | Waveguide power synthesis network topology and synthesis method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011025562A1 (en) * | 2009-08-24 | 2011-03-03 | Raytheon Company | Multi-layer radial power divider/combiner |
| CN105634418A (en) * | 2014-10-25 | 2016-06-01 | 陕西高新能源发展有限公司 | Power synthesis amplifier |
| CN205282627U (en) * | 2015-10-20 | 2016-06-01 | 成都威频通讯技术有限公司 | Ware was divided to merit in 16 minutes |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011025562A1 (en) * | 2009-08-24 | 2011-03-03 | Raytheon Company | Multi-layer radial power divider/combiner |
| CN105634418A (en) * | 2014-10-25 | 2016-06-01 | 陕西高新能源发展有限公司 | Power synthesis amplifier |
| CN205282627U (en) * | 2015-10-20 | 2016-06-01 | 成都威频通讯技术有限公司 | Ware was divided to merit in 16 minutes |
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