Ultra-wideband eight-channel high-power synthesizer
By adopting the gradient coaxial structure and fin line design in the radar system, the problem that traditional power synthesizers are difficult to meet ultra-wideband, high power and low cost requirements is solved, and ultra-wideband power synthesis with frequency coverage of 2GHz to 18GHz is achieved, with the advantages of high efficiency, low loss and miniaturization.
Patent Information
- Application Number
- CN202510326438.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2025-06-20
AI Technical Summary
In existing radar systems, traditional power synthesizers are difficult to meet ultra-wideband, high power and low cost requirements, especially in the range of frequency coverage of 2GHz to 18GHz.
Using gradient coaxial structure and fin lines as transmission lines, an ultra-wideband eight-channel high-power synthesizer is designed. Through the inner conductor structure composed of a solid gradient round table and a solid metal cylinder, a good impedance matching is achieved, and the electromagnetic wave energy conversion and resonance suppression are achieved through the fin lines.
It realizes ultra-wideband power synthesis with an operating frequency covering 2GHz to 18GHz, with large power capacity, small transmission loss, high transmission efficiency, miniaturization of the overall structure and easy processing.
Smart Images
Figure CN120184545A_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present application relate to the technical field of radar, and particularly to a high-power synthesizer with ultra-wideband eight channels. Background Art
[0002] In a radar system, in order to improve the detection range and operating range of the radar, it is necessary to continuously increase the output power of the transmitter. As the working frequency band expands, in the high-frequency part, the output power of a single solid-state device will rapidly decrease, so more stages of power amplification are required. At the same time, problems such as impedance matching and heat dissipation caused by the increase in frequency and the decrease in wavelength become more prominent. Therefore, power synthesis is generally used in radar systems to obtain high power.
[0003] With the development of communication technology, radar systems are also facing the need for wide frequency bands. The main working frequency bands of currently commonly used radar transmitters cover the S band, C band, X band, and Ku band. However, the working frequency bands of most radar transmitters are limited to a single band and it is difficult to cover multiple continuous bands. Among various power synthesis forms, the common waveguide form power synthesis has a relatively wide coverage frequency and can withstand high power, but it has a large volume. The planar power synthesizer in the form of microstrip and stripline has a narrow coverage frequency and cannot meet the requirements of ultra-wideband.
[0004] When radar transmitters are gradually developing towards the direction of ultra-wideband, high-power, and integration, the currently commonly used broadband power synthesizers can no longer meet the actual needs. In order to cover the current frequency bands to a greater extent, it is urgent to develop a power synthesizer with ultra-fast band, high power, and low cost. Summary of the Invention
[0005] In view of this, embodiments of the present application propose a high-power synthesizer with ultra-wideband eight channels. The overall structural size of this synthesizer is small, easy to process, has a large power capacity, low transmission loss, and high transmission efficiency, and well meets the requirement of covering the working frequency from 2 GHz to 18 GHz.
[0006] In a first aspect, an embodiment of the present application provides a high-power synthesizer with ultra-wideband eight channels, comprising: a metal outer conductor housing, a metal inner conductor, and eight fin-line metal printed circuit boards; the metal outer conductor housing is composed of a hollow frustum metal outer shell, a hollow cylindrical metal outer shell, and a metal outer conductor bottom plate. The port cross-sections of the hollow frustum metal outer shell and the hollow cylindrical metal outer shell are both circular rings. An opening is provided at the top of the frustum of the hollow frustum metal outer shell for placing an SMA connector as a power output terminal. Slots are provided on the inner wall of the hollow cylindrical metal outer shell for fixing the first ends of the respective fin-line metal printed circuit boards; the metal inner conductor is composed of a solid tapered frustum and a solid metal cylinder. A metal groove is provided at the top of the solid tapered frustum for welding and connecting the metal inner core of the SMA connector. Slots are provided on the outer surface of the solid metal cylinder for fixing the second ends of the respective fin-line metal printed circuit boards that are directly opposite to the first ends; wherein, the solid tapered frustum and the hollow frustum metal outer shell form a tapered coaxial structure, which is filled with air inside; the third ends of the respective fin-line metal printed circuit boards that are adjacent to both the first ends and the second ends are fixed on the metal outer conductor bottom plate. Eight small holes are also provided on the metal outer conductor bottom plate for placing SMA connectors as power input terminals. The eight SMA connectors serving as power input terminals are all welded to the microstripes at the fin ends of the corresponding fin-line metal printed circuit boards.
[0007] Optionally, the top of the solid tapered frustum improves the synthesis loss through a simulation optimization method. The cross-section of the solid tapered frustum is an irregular quadrilateral, and the waist of the quadrilateral is a smooth curve. After repeated optimization, when the curve passes through two points, the transmission effect of the tapered coaxial is the best. From the fin end to the bottom end of the tapered coaxial, the characteristic impedance is 41.5 Ω, and the tapered coaxial transforms the characteristic impedance of 41.5 Ω to the standard impedance of 50 Ω at the output port.
[0008] Optionally, the width of the metal groove provided at the top of the solid tapered frustum is slightly wider than the diameter of the metal inner core of the SMA connector serving as the power output terminal, so as to facilitate the inflow and fixation of solder when welding and connecting the metal inner core of the SMA connector serving as the power output terminal to the metal groove.
[0009] Optionally, before fixedly connecting the hollow cylindrical metal outer shell to the metal outer conductor bottom plate, the SMA connectors serving as power input terminals are pre-welded to the microstripes at the fin ends of the corresponding fin-line metal printed circuit boards. When fixedly connecting the hollow cylindrical metal outer shell to the metal outer conductor bottom plate, the SMA connectors serving as power input terminals are passed through the corresponding small holes provided on the metal outer conductor bottom plate.
[0010] Optionally, the materials of the hollow frustum metal outer shell, the hollow cylindrical metal outer shell, the metal outer conductor bottom plate, the solid tapered frustum, and the solid metal cylinder are all aluminum.
[0011] Optionally, each finline metal printed circuit board uses a printed circuit board material with a thickness of 1.018 mm and a dielectric constant of 2.2. Each finline metal printed circuit board is metal-wrapped and provided with two rows of grounding vias.
[0012] Optionally, the designed range of the frustum height of the hollow frustum metal shell is from 40.44 mm to 40.8 mm, the designed range of the diameter of the top of the frustum of the hollow frustum metal shell is from 9.35 mm to 9.45 mm, the designed range of the opening diameter of the top of the frustum of the hollow frustum metal shell is from 4.35 mm to 4.45 mm, and the designed range of the opening depth of the top of the frustum of the hollow frustum metal shell is from 3.95 mm to 4.05 mm; the designed range of the length of the unslotted part of the hollow cylindrical metal shell is from 23.0 mm to 23.5 mm, the designed range of the slotted length of the inner wall of the hollow cylindrical metal shell is from 201.0 mm to 202.0 mm, the designed range of the slotted depth of the inner wall of the hollow cylindrical metal shell is from 2.95 mm to 3.05 mm, the designed range of the wall thickness of the hollow cylindrical metal shell is from 6.5 mm to 7.5 mm, and the designed range of the diameter of the hollow part of the hollow cylindrical metal shell is from 23.9 mm to 24.1 mm; the designed range of the thickness of the metal outer conductor bottom plate is from 3.95 mm to 4.05 mm.
[0013] Optionally, the designed range of the top diameter of the solid tapered frustum is from 2.95 mm to 3.05 mm, the designed range of the slotted diameter of the top of the solid tapered frustum is from 1.9 mm to 2.1 mm, the designed range of the slotted depth of the top of the solid tapered frustum is from 2.4 mm to 2.7 mm, and the designed range of the frustum height of the top of the solid tapered frustum is from 39.5 mm to 39.7 mm; the designed range of the diameter of the solid metal cylinder is from 11.9 mm to 12.1 mm, and the designed range of the slotted depth of the solid metal cylinder is from 2.95 mm to 3.05 mm.
[0014] Optionally, the width of the finline metal printed circuit board is designed to range from 11.9 mm to 12.1 mm, the width of the microstrip of the finline metal printed circuit board is designed to range from 2.95 mm to 3.05 mm, the distance from the end position of the finline tapered section of the finline metal printed circuit board to the fourth end opposite to the third end is designed to range from 15.25 mm to 15.35 mm, the distance from the end position of the finline tapered section of the finline metal printed circuit board to the third end is designed to range from 186.1 mm to 186.3 mm, the length of the finline tapered section of the finline metal printed circuit board is designed to range from 135.7 mm to 135.9 mm, the spacing of the crossing part of the finline tapered section of the finline metal printed circuit board is designed to range from 3.87 mm to 3.88 mm, the distance from the end position of the crossing part of the finline tapered section of the finline metal printed circuit board to the microstrip is designed to range from 45.4 mm to 45.6 mm, and the distance between the microstrip of the finline metal printed circuit board and the third end is designed to range from 0.95 mm to 1.05 mm.
[0015] A high-power synthesizer with ultra-wideband eight channels proposed in this application uses a tapered coaxial structure and finlines as transmission lines to achieve the synthesis of eight-channel equi-amplitude and in-phase high-power signals. The inner conductor structure of the tapered coaxial structure is designed as a solid tapered frustum and a solid metal cylinder, and the design of the tapered coaxial structure realizes better impedance matching. A metal groove is opened at the top of the solid tapered frustum to install an SMA-type connector as the power output end, so as to realize the power synthesis output. The distance between the end of the solid tapered frustum and the metal outer conductor housing is large enough to accommodate the finline metal printed circuit board, and the solid metal cylinder and the hollow cylindrical metal housing cooperate to fix the finline metal printed circuit board. The finline metal printed circuit board uses finlines to realize the conversion of electromagnetic wave energy through different transmission media of microstrip - finline - tapered coaxial, and suppresses resonance by adjusting the relative position relationship of the finline crossing tapered section. The finline metal printed circuit board is metal-wrapped and provided with two rows of grounding vias to ensure good grounding performance. Through the design of the above links, an ultra-wideband high-power synthesizer based on tapered coaxial and finlines with a working frequency covering 2 GHz to 18 GHz is realized.
[0016] Compared with traditional power synthesizers, a high-power synthesizer with ultra-wideband eight channels proposed in this application has at least the following advantages and beneficial effects.
[0017] First, ultra-wideband. The whole application adopts a tapered coaxial and finline structure, realizing a relatively smooth impedance matching transition, ensuring that the working frequency range of the power synthesizer covers 2 GHz to 18 GHz, and realizing ultra-wideband power synthesis.
[0018] Second, large power capacity. This application uses a tapered coaxial and finlines as transmission lines, with a large power capacity, small transmission loss, and high transmission efficiency, ensuring that the power synthesizer transmits high-power signals.
[0019] Thirdly, miniaturization. The overall structure is relatively small. The eight-channel input ends are evenly distributed in a fan shape around the inner conductor, saving a large amount of space compared with the planar power combiner. At the same time, the sizes of the tapered coaxial and finline structures are small. Therefore, the overall structural size of this power combiner is small.
[0020] Fourthly, easy to process. The overall structure includes metal structural parts and finline metal printed boards. Compared with other traditional power combiners, the structural composition is simpler and easier to process.
[0021] In a second aspect, an embodiment of the present application provides a radar transmitter, and the radar transmitter includes a high-power combiner with ultra-wideband eight channels as described in the first aspect.
[0022] It can be understood that the beneficial effects of the above second aspect can be referred to the relevant descriptions in the first aspect, and will not be elaborated here. Description of the Drawings
[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present application or the related art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0024] Figure 1 is a vertical cross-sectional view of a high-power combiner with ultra-wideband eight channels provided by an embodiment of the present application;
[0025] Figure 2 is a longitudinal cross-sectional view of a high-power combiner with ultra-wideband eight channels provided by an embodiment of the present application;
[0026] Figure 3 is a dimensional structure diagram of a metal outer conductor housing provided by an embodiment of the present application;
[0027] Figure 4 is a dimensional structure diagram of a metal inner conductor provided by an embodiment of the present application;
[0028] Figure 5 is a dimensional structure diagram of a finline metal printed board provided by an embodiment of the present application. Detailed Embodiments
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will elaborate on each embodiment of this application in conjunction with the accompanying drawings. In various embodiments of this application, many technical details are proposed to enable readers to better understand this application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can still be implemented. The division of the following embodiments is only for convenience of description and should not impose any limitation on the specific implementation of this application. The various embodiments can be combined and cross-referenced with each other on the premise of not being contradictory.
[0030] An embodiment of this application proposes a high-power synthesizer with ultra-wideband eight channels. The following specifically describes the implementation details of a high-power synthesizer with ultra-wideband eight channels proposed in this embodiment. The following content is only the implementation details provided for convenience of understanding and is not necessary for implementing this solution.
[0031] A high-power synthesizer with ultra-wideband eight channels proposed in this embodiment consists of a metal outer conductor housing, a metal inner conductor, and eight fin-line metal printed boards. Its specific structure can be as Figure 1 shown.
[0032] The metal outer conductor housing is composed of a hollow frustum metal shell 6, a hollow cylindrical metal shell 9, and a metal outer conductor bottom plate 10. The hollow frustum metal shell 6, the hollow cylindrical metal shell 9, and the metal outer conductor bottom plate 10 together form a hollow cavity. The cross-sections of the ports of the hollow frustum metal shell 6 and the hollow cylindrical metal shell 9 are both circular rings. The frustum top of the hollow frustum metal shell 6 is opened to place an SMA-type connector as the power output end (i.e., Figure 1 the SMA-type connector 1 as the power output end in Figure 1 Two fin-line metal printed boards are shown in
[0033] The metal inner conductor is placed in the metal outer conductor housing and is composed of a solid tapered frustum 2 and a solid metal cylinder 7. The top of the solid tapered frustum 2 is provided with a metal groove for welding and connecting the metal inner core of the SMA-type connector 1 as the power output end. The outer surface of the solid metal cylinder 7 is grooved to fix the second ends of the fin-line metal printed boards (opposite to the first ends), so as to cooperate with the hollow cylindrical metal shell 9 to firmly fix the fin-line metal printed board 3. The solid tapered frustum 2 and the hollow frustum metal shell 6 form a tapered coaxial structure, and the interior is filled with air.
[0034] The third end (adjacent to both the first end and the second end) of each finline metal printed circuit board is fixed on the metal outer conductor base plate 10. There are also 8 small holes (corresponding to each finline metal printed circuit board) opened on the metal outer conductor base plate 10 for placing SMA connectors as power input ends (i.e., Figure 1 the SMA connector 11 as the power input end in
[0035] ). The 8 SMA connectors 11 as power input ends are all soldered on the microstrip at the finline end of the corresponding finline metal printed circuit board.
[0036] As Figure 2 shown, there are 8 small holes evenly opened on the metal outer conductor base plate 10, and the positions of these 8 small holes correspond to those of the 8 finline metal printed circuit boards. The front and back surfaces of the finline metal printed circuit board 3 are respectively called the front metal fin 4 and the back metal fin 5. Each finline metal printed circuit board is sandwiched between the hollow cylindrical metal shell 9 and the solid metal cylinder 7. Each finline metal printed circuit board uses a printed circuit board material with a thickness of 1.018 mm and a dielectric constant of 2.2. Each finline metal printed circuit board is metal-edge wrapped and provided with two rows of grounding through holes ( Figure 2 the grounding through hole 8 in
[0037] ), and resin is used to plug the holes to ensure good grounding performance.
[0038] The width of the metal groove opened at the top of the solid tapered frustum 2 is slightly wider than the diameter of the metal inner core of the SMA connector 1 as the power output end, so as to facilitate the inflow and fixation of the solder when welding the metal inner core of the SMA connector 1 as the power output end to the metal groove.
[0039] Before fixedly connecting the hollow cylindrical metal housing 9 and the metal outer conductor base plate 10, the SMA connector 11 serving as the power input end needs to be soldered in advance on the microstrip at the fin line end of the corresponding fin line metal printed board. When fixedly connecting the hollow cylindrical metal housing 9 and the metal outer conductor base plate 10, the SMA connector serving as the power input end is passed through the corresponding small holes opened on the metal outer conductor base plate, and then the metal outer conductor base plate 10 and each fin line printed board are inserted together between the solid metal cylinder 7 and the hollow cylindrical metal housing 9, and are clamped and fixed through the grooves opened on the solid metal cylinder 7 and the hollow cylindrical metal housing 9, finally completing the overall assembly of a high-power synthesizer with ultra-wideband eight channels proposed in this embodiment.
[0040] The materials of the hollow frustum metal housing 6, the hollow cylindrical metal housing 9, the metal outer conductor base plate 10, the solid tapered frustum 2 and the solid metal cylinder 7 are all aluminum. When applied to scenarios such as aerospace, titanium can also be selected if cost is not a concern.
[0041] The size structures of the metal outer conductor housing, the metal inner conductor and the fin line metal printed board of a high-power synthesizer with ultra-wideband eight channels proposed in this embodiment are respectively as Figure 3 、 Figure 4 and Figure 5 shown, and the specific design values and design ranges are shown in Table 1, Table 2 and Table 3 respectively.
[0042] Table 1: Dimensions of the metal outer conductor housing
[0043]
[0044]
[0045] Table 2: Dimensions of the metal inner conductor
[0046]
[0047] Table 3: Dimensions of the fin line metal printed board
[0048]
[0049]
[0050] Refer to Figure 5 , and it should be particularly noted that there are two fin lines designed on the fin line metal printed board, and there are overlapping parts between the two fin lines. Resonance can be suppressed by adjusting the relative position relationship of the fin line cross-over gradient section.
[0051] Through actual processing tests, a high-power synthesizer with eight ultra-wideband channels proposed in this embodiment has a standing wave of less than 1.25 at the microstrip input port and an insertion loss of less than 1.2 dB within the entire frequency band from 2 GHz to 18 GHz. When used as a power divider (i.e., the SMA connector at the top of the solid tapered frustum is used as the power input end, and the eight SMA connectors on the metal outer conductor base plate are used as the power output ends), the amplitude difference between the eight output ports is within 0.8 dB and the phase difference is within 10 degrees, fully meeting the design requirements. Based on the design of the air-filled tapered coaxial, it has the characteristics of ultra-wideband and high-power transmission.
[0052] A high-power synthesizer with eight ultra-wideband channels proposed in this embodiment uses a tapered coaxial structure and finlines as transmission lines to achieve the synthesis of high-power signals with equal amplitude and in-phase for eight channels. The inner conductor structure of the tapered coaxial is designed as a combination of a solid tapered frustum and a solid metal cylinder, and the design of the tapered coaxial structure achieves better impedance matching. A metal groove is opened at the top of the solid tapered frustum to install an SMA connector as the power output end, thereby realizing the power synthesis output. The distance between the end of the solid tapered frustum and the metal outer conductor housing is large enough to accommodate the finline metal printed board, and the solid metal cylinder cooperates with the hollow cylindrical metal housing to fix the finline metal printed board. The finline metal printed board uses finlines to achieve the conversion of electromagnetic wave energy through different transmission media of microstrip - finline - tapered coaxial, and suppresses resonance by adjusting the relative position relationship of the finline cross-tapered section. The finline metal printed board is metal-wrapped and provided with two rows of grounding vias to ensure good grounding performance. Through the above design, an ultra-wideband high-power synthesizer with a working frequency covering 2 GHz to 18 GHz based on tapered coaxial and finlines is realized.
[0053] Compared with traditional power synthesizers, a high-power synthesizer with eight ultra-wideband channels proposed in this embodiment has at least the following advantages and beneficial effects.
[0054] First, ultra-wideband. The whole application adopts a tapered coaxial and finline structure, realizing a relatively smooth impedance matching transition, ensuring that the working frequency range of the power synthesizer covers 2 GHz to 18 GHz, and achieving ultra-wideband power synthesis.
[0055] Second, large power capacity. The application uses a tapered coaxial and finlines as transmission lines, with a large power capacity, small transmission loss, and high transmission efficiency, ensuring that the power synthesizer transmits high-power signals.
[0056] Third, miniaturization. The overall structure is small. The eight-channel input ends are evenly distributed in a fan shape around the inner conductor, saving a large amount of space compared with planar power synthesizers. At the same time, the sizes of the tapered coaxial and finline structures are small, so the overall structure size of this power synthesizer is small.
[0057] Fourth, easy to process. The overall structure includes metal structural parts and fin-line metal printed circuit boards. Compared with other traditional power combiners, the structural composition is simpler and easier to process.
[0058] Another embodiment of the present application provides a radar transmitter, which includes a high-power combiner with ultra-wideband eight channels as described in the above embodiment.
[0059] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present application. In actual applications, various changes can be made to them in form and details without departing from the spirit and scope of the present application.
Claims
1. An ultra-wideband eight-channel high-power synthesizer, characterized in that: include: Metal outer conductor shell, metal inner conductor and 8 fin line metal printed boards; The metal outer conductor shell is composed of a hollow truncated cone metal shell, a hollow cylindrical metal shell and a metal outer conductor bottom plate. The port cross sections of the hollow truncated cone metal shell and the hollow cylindrical metal shell are both circular rings. The top of the truncated cone of the hollow truncated cone metal shell is opened to place an SMA type connector as a power output end. The inner wall of the hollow cylindrical metal shell is grooved to fix the first end of each fin line metal printed circuit board. The metal inner conductor is composed of a solid tapered truncated cone and a solid metal cylinder. A metal groove is provided at the top of the solid tapered truncated cone for welding and connecting the metal inner core of the SMA connector. A groove is provided on the outer surface of the solid metal cylinder for fixing the second end of each fin line metal printed circuit board which is opposite to the first end. The solid tapered truncated cone and the hollow truncated cone metal shell form a tapered coaxial structure, which is filled with air. The third end of each fin-line metal printed circuit board, which is adjacent to the first end and the second end, is fixed on the metal outer conductor base plate. The metal outer conductor base plate is also provided with 8 small holes for placing SMA type connectors as power input ends. The 8 SMA type connectors serving as power input ends are all welded to the microstrip at the end of the fin line of the corresponding fin-line metal printed circuit board.
2. The ultra-wideband eight-channel high-power synthesizer according to claim 1, characterized in that: The top of the solid tapered cone is optimized through simulation to improve the synthetic loss. The cross-section of the solid tapered cone is an irregular quadrilateral, and the waist of the quadrilateral is a smooth curve. After repeated optimization, when the curve passes through two points, the transmission effect of the tapered coaxial is the best. From the end of the fin line to the bottom of the tapered coaxial, the characteristic impedance is 41.5Ω. The tapered coaxial transforms the characteristic impedance of 41.5Ω to the standard impedance of 50Ω at the output port.
3. The ultra-wideband eight-channel high-power synthesizer according to claim 1, characterized in that: The width of the metal groove opened at the top of the solid tapered cone is slightly wider than the diameter of the metal core of the SMA type connector as the power output end, so as to facilitate the flow of solder to fix the metal core of the SMA type connector as the power output end and the metal groove when welding them.
4. The ultra-wideband eight-channel high-power synthesizer according to claim 1, characterized in that: Before the hollow cylindrical metal shell is fixedly connected to the metal outer conductor bottom plate, the SMA type connector serving as the power input end is welded in advance to the microstrip at the end of the fin line of the corresponding fin line metal printed circuit board. When the hollow cylindrical metal shell is fixedly connected to the metal outer conductor bottom plate, the SMA type connector serving as the power input end is passed through the corresponding small hole opened on the metal outer conductor bottom plate.
5. The ultra-wideband eight-channel high-power synthesizer according to claim 1, characterized in that: The hollow truncated cone metal shell, the hollow cylindrical metal shell, the metal outer conductor bottom plate, the solid gradient truncated cone and the solid metal cylinder are all made of aluminum.
6. The ultra-wideband eight-channel high-power synthesizer according to claim 1, characterized in that: Each fin line metal printed circuit board uses a printed circuit board material with a thickness of 1.018 mm and a dielectric constant of 2.
2. Each fin line metal printed circuit board is metal-wrapped and is provided with two rows of grounding through holes.
7. An ultra-wideband eight-channel high-power synthesizer according to any one of claims 1 to 6, characterized in that: The design range of the truncated cone height of the hollow truncated cone metal shell is 40.44 mm to 40.8 mm, the design range of the diameter of the truncated cone top of the hollow truncated cone metal shell is 9.35 mm to 9.45 mm, the design range of the opening diameter of the truncated cone top of the hollow truncated cone metal shell is 4.35 mm to 4.45 mm, and the design range of the opening depth of the truncated cone top of the hollow truncated cone metal shell is 3.95 mm to 4.05 mm; The design range of the length of the ungrooved portion of the hollow cylindrical metal shell is 23.0 mm to 23.5 mm, the design range of the groove length of the inner wall of the hollow cylindrical metal shell is 201.0 mm to 202.0 mm, the design range of the groove depth of the inner wall of the hollow cylindrical metal shell is 2.95 mm to 3.05 mm, the design range of the wall thickness of the hollow cylindrical metal shell is 6.5 mm to 7.5 mm, and the design range of the diameter of the hollow portion of the hollow cylindrical metal shell is 23.9 mm to 24.1 mm; The thickness of the metal outer conductor bottom plate is designed to range from 3.95 mm to 4.05 mm.
8. An ultra-wideband eight-channel high-power synthesizer according to any one of claims 1 to 6, characterized in that: The design range of the top diameter of the solid tapered truncated cone is 2.95 mm to 3.05 mm, the design range of the groove diameter of the top of the solid tapered truncated cone is 1.9 mm to 2.1 mm, the design range of the groove depth of the top of the solid tapered truncated cone is 2.4 mm to 2.7 mm, and the design range of the truncated cone height of the top of the solid tapered truncated cone is 39.5 mm to 39.7 mm; The design range of the diameter of the solid metal cylinder is 11.9 mm to 12.1 mm, and the design range of the groove depth of the solid metal cylinder is 2.95 mm to 3.05 mm.
9. An ultra-wideband eight-channel high-power synthesizer according to any one of claims 1 to 6, characterized in that: The design range of the width of the fin metal printed circuit board is 11.9mm to 12.1mm, the design range of the width of the microstrip of the fin metal printed circuit board is 2.95mm to 3.05mm, the design range of the distance from the end position of the fin line gradient section of the fin metal printed circuit board to the fourth end directly opposite to the third end is 15.25mm to 15.35mm, and the design range of the distance from the end position of the fin line gradient section of the fin metal printed circuit board to the third end is 186.1mm to 186.3mm. The design range of the length of the fin line gradient section of the fin line metal printed circuit board is 135.7mm to 135.9mm, the design range of the spacing of the intersection part of the fin line gradient section of the fin line metal printed circuit board is 3.87mm to 3.88mm, the design range of the distance from the end position of the intersection part of the fin line gradient section of the fin line metal printed circuit board to the microstrip is 45.4mm to 45.6mm, and the design range of the distance between the microstrip of the fin line metal printed circuit board and the third end is 0.95mm to 1.05mm.
10. A radar transmitter, characterized in that: The radar transmitter comprises an ultra-wideband eight-channel high-power synthesizer as claimed in any one of claims 1 to 9.