Ultra-wideband high-power solid-state transmitter

Abstract

The invention discloses an ultra-wideband high-power solid-state transmitter. Comprising a power division amplification module used for carrying out pre-stage amplification on a radio frequency signal with a preset broadband and preset power; the high-power amplification module comprises multiple stages of radio frequency power amplifiers which are arranged in parallel so as to amplify the power of the radio frequency signal output by the power division amplification module to target power based on the high-power amplification module; the coupling detection module is used for performing coupling detection on the radio-frequency signal output by the high-power amplification module and outputting a target radio-frequency signal, a monitoring signal and a detection signal; and the main control module is used for processing the detection signal and feeding back the processed information to external equipment so as to determine output power information based on the external equipment. According to the invention, a high-power radio frequency signal can be output under an ultra-wideband working condition.

Description

Technical Field

[0001] The present invention relates to the technical field of transmitters, and in particular to an ultra-wideband high-power solid-state transmitter. Background Art

[0002] As an important signal transmitting device for radar detection, the output power of the transmitter directly determines the detection distance of the radar. Generally, the greater the output power of the transmitter, the longer the radar detection distance, and vice versa. However, the current transmitters either have insufficient bandwidth and can only output high-power signals under small bandwidth conditions, or can only output low-power signals under large bandwidth conditions, which seriously affects the development of radar detection technology.

[0003] Therefore, there is an urgent need for a transmitter that can achieve both large bandwidth and high power. Summary of the invention

[0004] The present invention provides an ultra-wideband high-power solid-state transmitter that can output high-power radio frequency signals under ultra-wideband conditions. The technical solution is as follows:

[0005] The present invention provides an ultra-wideband high-power solid-state transmitter, comprising:

[0006] A power divider amplifier module is used to pre-amplify the radio frequency signal with a preset bandwidth and preset power;

[0007] A high-power amplification module, comprising a plurality of radio frequency power amplifiers arranged in parallel, so as to amplify the power of the radio frequency signal output by the power division amplification module to a target power based on the high-power amplification module;

[0008] A coupling detection module, used to perform coupling detection on the radio frequency signal output by the high-power amplification module, and output a target radio frequency signal, a monitoring signal and a detection signal;

[0009] The main control module is used to process the detection signal and feed back the processed information to the external device to determine the output power information based on the external device.

[0010] In some possible designs, the high-power amplifier module further includes a driver amplifier, a plurality of power dividers, a plurality of bridges, and a plurality of synthesizers; each of the power dividers is used to equally divide one RF signal into two RF signals; each of the synthesizers is used to merge the two RF signals into one RF signal;

[0011] The drive-stage amplifier is used to amplify the radio-frequency signal output by the power-dividing and amplifying module for a second time; a plurality of power dividers are used to divide the radio-frequency signal after the second amplification into multiple sub-radio-frequency signals; each sub-radio-frequency signal flows through a bridge respectively and is amplified to the target power by a corresponding radio-frequency power amplifier; each amplified sub-radio-frequency signal flows through a bridge respectively and is synthesized by a plurality of synthesizers to obtain a radio-frequency signal.

[0012] In some possible designs, the power divider is a 0° power divider.

[0013] In some possible designs, the preset broadband is 6 - 18 GHZ.

[0014] In some possible designs, the coupling and detection module includes a detection unit and a coupler;

[0015] The coupler is used to couple the radio-frequency signal output by the high-power amplification module to output the target radio-frequency signal and two detected signals with powers less than the target power;

[0016] The detection unit is used to convert the two detected signals into a low-frequency monitoring signal and a detection signal; the detection signal is output to the main control module, and the monitoring signal is output to an external device.

[0017] In some possible designs, the top drop of the radio-frequency output of the transmitter is less than 0.5 dB, and the output power ≥ 100 W.

[0018] In some possible designs, a power supply module is further included, which is used to supply power to the power-dividing and amplifying module, the high-power amplification module, the coupling and detection module, and the main control module.

[0019] In some possible designs, a heat dissipation module is further included, which is used to perform air-cooled heat dissipation on the front end of the transmitter.

[0020] The embodiment of the present invention provides an ultra-wideband high-power solid-state transmitter. By setting a power-dividing and amplifying module, a high-power amplification module, a coupling and detection module, and a main control module, and the high-power amplification module includes a plurality of radio-frequency power amplifiers arranged in parallel, the input radio-frequency signals can be synthesized to realize the amplification of the power of small-power radio-frequency signals within an ultra-wide frequency band to obtain high-power radio-frequency signals. This application can output high-power radio-frequency signals under ultra-wideband working conditions. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is the internal electrical schematic diagram of an ultra-wideband high-power solid-state transmitter provided by an embodiment of the present invention;

[0023] Figure 2 It is the schematic diagram of the internal structure of the 6 - 18 GHz transmitting front-end provided by an embodiment of the present invention;

[0024] Figure 3 It is the radio frequency link block diagram of the transmitter provided by an embodiment of the present invention;

[0025] Figure 4 It is the small-signal gain curve of the high-power amplification module provided by an embodiment of the present invention;

[0026] Figure 5 It is the saturated output power curve of the high-power amplification module provided by an embodiment of the present invention;

[0027] Figure 6 It is the schematic diagram of the structure of the high-power amplification module provided by an embodiment of the present invention;

[0028] Figure 7 It is the schematic diagram of the microstrip-to-waveguide simulation model provided by an embodiment of the present invention;

[0029] Figure 8 It is the schematic diagram of the microstrip-to-waveguide standing wave simulation result provided by an embodiment of the present invention;

[0030] Figure 9 It is the microstrip-to-waveguide standing wave insertion loss result provided by an embodiment of the present invention;

[0031] Figure 10 It is the schematic diagram of the waveguide H-T power divider simulation model provided by an embodiment of the present invention;

[0032] Figure 11 It is the schematic diagram of the waveguide H-T power divider standing wave simulation result provided by an embodiment of the present invention;

[0033] Figure 12 It is the schematic diagram of the waveguide H-T power divider wave insertion loss simulation result provided by an embodiment of the present invention. Detailed implementation manners

[0034] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] The following describes the specific implementation manners of the above concepts.

[0036] Please refer to Figure 1 , the embodiment of the present invention provides an ultra-wideband high-power solid-state transmitter, including:

[0037] A power splitting and amplifying module for pre-amplifying a radio frequency signal with a preset bandwidth and a preset power;

[0038] A high-power amplifying module including a plurality of radio frequency power amplifiers arranged in parallel to amplify the power of the radio frequency signal output by the power splitting and amplifying module to a target power based on the high-power amplifying module;

[0039] A coupling and detection module for coupling and detecting the radio frequency signal output by the high-power amplifying module, and outputting a target radio frequency signal, a monitoring signal, and a detection signal;

[0040] A main control module for processing the detection signal and feeding back the processed information to an external device to determine the output power information based on the external device.

[0041] In this embodiment, by setting a power splitting and amplifying module, a high-power amplifying module, a coupling and detection module, and a main control module, and the high-power amplifying module includes a plurality of radio frequency power amplifiers arranged in parallel, the input radio frequency signals can be synthesized to amplify the power of the low-power radio frequency signals within an ultra-wide frequency band to obtain high-power radio frequency signals. In this application, high-power radio frequency signals can be output under ultra-wideband working conditions.

[0042] It should be noted that the preset bandwidth can be 6 - 18 GHz, the preset power is a low power less than the target power, and the target power can be 100 W. This application does not specifically limit the frequency band range of the bandwidth and the parameter ranges of each power.

[0043] In addition, the preferred parameters of each radio frequency power amplifier PA are as follows:

[0044] Frequency: 6 - 18 GHz

[0045] Typical output power: 43 dBm

[0046] Typical small-signal gain: 25 dB

[0047] Bias: 28V, -1.8V.

[0048] Among them, the signal gain curve and power curve of each radio frequency power amplifier PA are respectively as Figure 4 and Figure 5 shown.

[0049] In some embodiments, as Figure 2 and Figure 3 shown, the high-power amplification module further includes a driver-stage amplifier DPA, a plurality of power dividers, a plurality of bridges, and a plurality of combiners; each power divider is respectively used to equally divide a path of radio frequency signal into two paths of radio frequency signals; each combiner is respectively used to combine two paths of radio frequency signals into one path of radio frequency signal;

[0050] The driver-stage amplifier is used to perform secondary amplification on the radio frequency signal output by the power division and amplification module; the plurality of power dividers are used to divide the radio frequency signal after secondary amplification into multiple sub-radio frequency signals; each sub-radio frequency signal respectively flows through a bridge and is amplified to the target power by the corresponding radio frequency power amplifier; each amplified sub-radio frequency signal respectively flows through a bridge and then the multiple combiners synthesize each sub-radio frequency signal to obtain one path of radio frequency signal.

[0051] In this embodiment, the number of radio frequency power amplifiers PA can be 8, the number of power dividers and combiners is 3, the power dividers are 0° power dividers, and the number of bridges is 4 at the input end and output end of the radio frequency power amplifier PA respectively. Of course, the present application does not specifically limit the number of each component. The structure diagram of the high-power amplification module is as Figure 6 shown.

[0052] In some embodiments, the coupling and detection module includes a detection unit and a coupler;

[0053] The coupler is used to couple the radio frequency signal output by the high-power amplification module to output a target radio frequency signal and two paths of detection signals to be detected with power less than the target power;

[0054] The detection unit is used to convert the two paths of detection signals to be detected into a low-frequency monitoring signal and a detection signal; the detection signal is output to the main control module, and the monitoring signal is output to an external device.

[0055] In some embodiments, the top drop of the transmitter radio frequency output is less than 0.5 dB, and the output power ≥ 100W.

[0056] In some embodiments, a power supply module is further included, which is used to supply power to the power division and amplification module, the high-power amplification module, the coupling and detection module, and the main control module.

[0057] In this embodiment, the power supply module is powered by a power supply (AC220V) and a power conversion module (AC-DC) to supply power to each internal module.

[0058] In some embodiments, a heat dissipation module is further included, which is used for air-cooling the front end of the transmitter. The heat dissipation module is composed of a plurality of fan units.

[0059] In some embodiments, the transmitter further includes a chassis. The chassis parameters are determined according to requirements, such as:

[0060] A standard 19-inch chassis is adopted, which is a layered structure. The upper layer is the power amplifier cavity, and the lower layer is the radiator and air duct. There is a radiator below the heat source of the transmitter, and the air blows from the left to the right. The front panel has a monitoring signal port, a radio frequency input port, a local / remote control switch, a power switch, an alarm indicator, etc.; the rear panel has a transmission output port, a reception output port, a control interface, a 220V power input interface, a test interface, a grounding stake, etc.

[0061] Of course, the present application is not limited to the above parameters, and users can determine according to actual requirements.

[0062] In order to prove the effect of the transmitter of the present application, the inventor verified the transmitter with the following parameters.

[0063] The inventor first carried out modeling and simulation on the link of the high-power amplification module and the waveguide H-T power divider. Among them, the microstrip-to-waveguide simulation model and simulation results of the link are respectively as Figures 7 - 9 shown, and the simulation model and simulation results of the waveguide H-T power divider are respectively as Figures 10 - 12 shown. The simulation result of the waveguide H-T power divider is that the waveguide H-T standing wave ≤ 1.13 and the insertion loss ≤ 0.1 dB.

[0064] Based on the above simulation results, the inventor calculated the parameters of each component in the transmitter, and the calculation results are respectively:

[0065] The total insertion loss of the input power divider is 1 dB, the insertion loss of the two-stage bridge is 1.4 dB, the small-signal gain of the driver amplifier DPA is 25 dB, the microstrip-to-waveguide insertion loss is 0.3 dB, the insertion loss of the two-stage waveguide H-T power divider is 0.2 dB, the total insertion loss of the link is 3.6 dB, the gain of the high-power amplification module is 21.4 dB, the saturation output power of the radio frequency power amplifier PA ≥ 43.5 dBm, and the top drop is about 0.5 dB under a 20% duty cycle. Then the saturation output power of the high-power amplification module ≥ 51.8 dBm, meeting the requirement that the designed output power is greater than 100W.

[0066] In addition, at a duty cycle of 20%, the power consumption of the radio frequency power amplifier PA is 26.3 W, and the total power consumption of the high-power amplification module is 210.4 W. The power gain flatness of the radio frequency power amplifier PA is ±0.5 dB, the insertion loss flatness of the bridge and waveguide is ±0.2 dB, and the saturation gain flatness of the high-power amplification module is ±0.7 dB.

[0067] In summary, the main parameters of the main indicators of the high-power amplification module are shown in Table 1:

[0068] Table 1 Main indicators of the high-power amplification module

[0069] Serial Number Main Technical Index Design Value 1 Operating Frequency 6 - 18 GHz 2 Saturated Output Power ≥51.8 dBm 3 Linear Gain ≥21.4 dB 4 Saturated Gain Flatness ±0.7 dB 5 Saturated Drive Power ≥37 dBm 6 Input Standing Wave ≤1.8 7 Leading and Trailing Edges ≤30 ns 8 Power Consumption 210.4W(20％)

[0070] From the above results, it can be seen that this application can output high-power radio frequency signals under ultra-wideband operating conditions.

[0071] Finally, it should also be noted that in this article, relational terms such as first, second, third, and fourth are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article, or device including the element.

[0072] The above are only the preferred embodiments of this application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this application.

Claims

1. An ultra-wideband high-power solid-state transmitter, characterized in that: include: A power divider amplifier module is used to pre-amplify the radio frequency signal with a preset bandwidth and preset power; A high-power amplification module, comprising a plurality of radio frequency power amplifiers arranged in parallel, so as to amplify the power of the radio frequency signal output by the power division amplification module to a target power based on the high-power amplification module; A coupling detection module, used to perform coupling detection on the radio frequency signal output by the high-power amplification module, and output a target radio frequency signal, a monitoring signal and a detection signal; The main control module is used to process the detection signal and feed back the processed information to the external device to determine the output power information based on the external device.

2. The transmitter according to claim 1, characterized in that The high-power amplifier module also includes a driver amplifier, a plurality of power dividers, a plurality of bridges and a plurality of synthesizers; each of the power dividers is used to divide one RF signal into two RF signals; each of the synthesizers is used to combine the two RF signals into one RF signal; The driver-stage amplifier is used to perform secondary amplification on the radio frequency signal output by the power division amplifier module; Multiple power dividers are used to divide the secondary amplified RF signal into multiple sub-RF signals; each sub-RF signal flows through a bridge and is amplified to the target power by a corresponding RF power amplifier; each amplified sub-RF signal flows through a corresponding bridge and is synthesized by multiple synthesizers to obtain one RF signal.

3. The transmitter according to claim 2, characterized in that The power divider is a 0° power divider.

4. The transmitter according to claim 1, characterized in that The preset bandwidth is 6 to 18 GHZ.

5. The transmitter according to claim 1, characterized in that The coupled detection module includes a detection unit and a coupler; The coupler is used to couple the radio frequency signal output by the high-power amplification module to output the target radio frequency signal and two to-be-detected signals whose power is less than the target power; The detection unit is used to convert two to-be-detected signals into low-frequency monitoring signals and detection signals; the detection signal is output to the main control module, and the monitoring signal is output to an external device.

6. The transmitter according to claim 1, characterized in that The transmitter has a radio frequency output drop of less than 0.5 dB and an output power of ≥ 100 W.

7. The transmitter according to claim 1, characterized in that It also includes a power supply module for providing power to the power division amplification module, the high-power amplification module, the coupling detection module and the main control module.

8. The transmitter according to claim 1, characterized in that It also includes a heat dissipation module for air-cooling the front end of the transmitter.

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