Application of C-band high-power radial synthesizer in broadcast and television satellite communications

Abstract

The present invention provides an application of a C-band high-power radial synthesizer in broadcasting and television satellite communications. The C-band high-power radial synthesizer used in broadcasting and television satellite communications includes a housing and a matching truncated cone placed in the housing, a plurality of coaxial-waveguide step conversions and coaxial ports evenly distributed on the sides of the matching truncated cone; one coaxial-waveguide step conversion corresponds to one coaxial port, and they are interconnected, and the coaxial port is installed on the housing; a waveguide synthesis port connected to the matching truncated cone is provided on the housing, and a stepped output impedance matching ladder is provided in the waveguide synthesis port, and the output impedance matching ladder is connected to the matching truncated cone through a channel; equal amplitude and same phase input radio frequency signals are fed into the coaxial-waveguide step conversion through the coaxial port. The present invention is mainly used in broadcasting and television satellite communications, and has the advantages of high synthesis efficiency and large synthesis power in actual use.

Description

Technical Field

[0001] The present invention relates to the field of communication technology equipment, and in particular to the application of a C-band high-power radial synthesizer in broadcast and television satellite communications. Background Art

[0002] With the rapid development of satellite communication systems, the demand for high-frequency, high-efficiency, wide-bandwidth, high-power solid-state amplifiers is increasing day by day. However, the power output of a single solid-state device in the microwave millimeter wave frequency band is limited and cannot meet the needs of the system. In order to obtain a higher output power, power synthesis measures are often required. For example, multiple power devices are concentrated in a power synthesis amplifier. On the other hand, for economic and reliability considerations, a smaller power source is usually used for synthesis instead of directly using a large power source. In this way, in addition to being able to generate higher power, it can also ensure that the system continues to work without complete failure when one or more sources fail, but the system performance is reduced.

[0003] At present, the power amplifiers used in the satellite communication high-power amplifier systems of satellite broadcasting and television earth stations in various provinces and cities in China are basically klystron and traveling wave tube power amplifiers from the American CPI company, which have technical problems such as difficult maintenance and replacement and low reliability. Summary of the invention

[0004] The object of the present invention is to provide a C-band high-power radial synthesizer, which is mainly used in broadcast and television satellite communications and has the advantages of high synthesis efficiency and high synthesis power in actual use.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] Application of C-band high-power radial synthesizer in broadcasting and television satellite communications, the C-band high-power radial synthesizer used in broadcasting and television satellite communications comprises a housing and a matching truncated cone disposed in the housing, and a plurality of coaxial-waveguide step transitions and coaxial ports uniformly distributed on the side of the matching truncated cone;

[0007] Wherein, one coaxial-waveguide step transition corresponds to one coaxial port and the two are connected to each other, and the coaxial port is mounted on the housing;

[0008] The shell is provided with a waveguide synthesis port connected to the matching circular frustum, and a stepped output impedance matching ladder is provided in the waveguide synthesis port, and the output impedance matching ladder is connected to the matching circular frustum through a channel;

[0009] The input RF signal with equal amplitude and phase is fed into the coaxial-waveguide step conversion through the coaxial port. The signal continues to be matched from the coaxial-waveguide step conversion through the matching cone, and is simultaneously transmitted to the radial line of the central channel. After being matched through the output impedance matching ladder, it is output from the waveguide synthesis port to achieve high-power synthesis.

[0010] Furthermore, in some preferred implementation cases, the coaxial port has 16 channels, and the coaxial port adopts an N-type connector.

[0011] Furthermore, the waveguide output port of the waveguide synthesis port adopts a BJ70 waveguide port output.

[0012] Further, the C-band high-power radial synthesizer is used to be mounted on a mounting plate inside the chassis;

[0013] A first signal transmission unit and a second signal transmission unit are arranged in the chassis;

[0014] The first signal transmission unit and the second signal transmission unit are both mounted on the mounting plate, and the first signal transmission unit is located on the lower surface of the mounting plate, and the second signal transmission unit is located above the mounting plate;

[0015] A connecting hole is arranged on the mounting plate, and the first signal transmission unit is connected with the second signal transmission unit after passing through the connecting hole; a liquid cooling unit is arranged inside the mounting plate, and the mounting plate is made of heat-conducting material.

[0016] Further, the second signal transmission unit includes a first curved waveguide, a second curved waveguide, a high-power radial power divider, a small power amplifier module, a high-power isolator, a high-power radial synthesizer, a third curved waveguide, a waveguide filter, and a waveguide dual directional coupler, wherein the first curved waveguide, the second curved waveguide, the high-power radial power divider, the small power amplifier module, the high-power isolator, the high-power radial synthesizer, the third curved waveguide, and the waveguide filter are connected in sequence.

[0017] Wherein, a waveguide single directional coupler is arranged between the first curved waveguide and the second curved waveguide;

[0018] The output end of the waveguide filter is connected to a waveguide dual directional coupler, and a third curved waveguide is arranged between the dual directional coupler and the high-power radial synthesizer;

[0019] The power radial synthesizer is the C-band high-power radial synthesizer.

[0020] Furthermore, the high-power radial power divider is connected to the final-stage power amplifier module via a radio frequency cable.

[0021] Furthermore, the first signal transmission unit includes a preamplifier module, a low-power isolator, a first drive module, a high-power isolator, a multi-channel power splitter, a second drive module, an isolator, and a multi-channel synthesizer.

[0022] Each output end of the multi-channel power splitter is connected to the second driving submodule, the second driving submodule is connected to the input end of the multi-channel synthesizer through an isolator, the output end of the multi-channel synthesizer is connected to the second signal transmission unit through a twist waveguide, and after the pre-amplifier module, the low-power isolator, the first driving submodule, and the high-power isolator are connected in sequence, the high-power isolator is connected to the input end of the multi-channel power splitter.

[0023] Furthermore, the multi-channel power splitter is a 4-channel power splitter, and the multi-channel combiner is a 4-channel combiner.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention is mainly composed of a shell, a matching frustum, a coaxial-waveguide step conversion and a coaxial port. In actual use, a medium-amplitude and same-phase input radio frequency signal is fed into the coaxial-waveguide step conversion through the coaxial port, and the signal is further matched from the coaxial-waveguide step conversion through the matching frustum, and then transmitted to the radial line of the central channel at the same time, and then matched through the output impedance matching ladder, and then output from the waveguide synthesis port to realize high-power synthesis; the present invention is mainly used in broadcast and television satellite communications, and has the advantages of high synthesis efficiency and large synthesis power in actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of the C-band high-power radial synthesizer of the present invention.

[0028] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 3 For the present invention Figure 2 main view.

[0030] Figure 4 For the present invention Figure 2 Bottom view of .

[0031] Figure 5 For the present invention Figure 2Top view of the .

[0032] Figure 6 It is a schematic diagram of the internal structure of the mounting plate of the present invention.

[0033] Reference numerals:

[0034] 101 chassis, 102 mounting plate, 103 first signal transmission unit, 104 second signal transmission unit, 105 flow channel, 106 preamplifier module, 107 low-power isolator, 108 first driver module, 109 high-power isolator, 110 multi-channel power splitter, 111 second driver module, 112 isolator, 113 multi-channel synthesizer, 114 first curved waveguide, 115 waveguide single directional coupler, 116 second curved waveguide, 1 17 high-power radial power divider, 118 power amplifier small module, 119 first high-power isolator, 120 high-power radial combiner, 121 third bend waveguide, 122 waveguide filter, 123 waveguide dual directional coupler, 124 bracket, 125 twist waveguide, 126 housing, 127 matching frustum, 128 coaxial-waveguide step conversion, 129 coaxial port, 130 waveguide synthesis port, 131 output impedance matching ladder, 132 radial line. DETAILED DESCRIPTION

[0035] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0036] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0039] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] Embodiment 1

[0043] See also Figure 1 , this embodiment discloses a C-band high-power radial synthesizer, including a housing 126 and a matching truncated cone 127 disposed in the housing 126 , a plurality of coaxial-waveguide step transitions 128 and a coaxial port 129 uniformly distributed on the side of the matching truncated cone 127 ;

[0044] Wherein, a coaxial-waveguide step transition 128 corresponds to a coaxial port 129 and is connected to each other, and the coaxial port 129 is mounted on the housing 126;

[0045] The housing 126 is provided with a waveguide synthesis port 130 connected to the matching circular frustum 127. A stepped output impedance matching step 131 is provided in the waveguide synthesis port 130. The output impedance matching step 131 is connected to the matching circular frustum 127 through a channel.

[0046] The input RF signal of equal amplitude and same phase is fed into the coaxial-waveguide step conversion 128 through the coaxial port 129. The signal continues to be matched from the coaxial-waveguide step conversion 128 through the matching cone 127, and is simultaneously transmitted to the radial line 132 of the central channel. After being matched through the output impedance matching ladder 131, it is output from the waveguide synthesis port 130 to achieve high-power synthesis.

[0047] Furthermore, there are 16 coaxial ports, and the coaxial port 129 adopts an N-type connector.

[0048] The waveguide output port of the waveguide synthesis port 130 adopts a BJ70 waveguide port output.

[0049] The present invention synthesizes the solid-state power amplifier through a high-power radial synthesizer to achieve high-power output; unlike the conventional T-section synthesizer which requires multi-stage synthesis, the radial synthesizer only needs one stage to achieve multi-channel synthesis. The high-power radial synthesizer has the characteristics of small size, low loss, high synthesis efficiency, arbitrary synthesis paths, high isolation between channels, good replacement and maintenance, good stability, high reliability, etc., and can completely replace the power amplifier system products of CPI Company in the United States. The output power of the high-power radial synthesizer can reach more than 2000W of continuous wave.

[0050] Embodiment 2

[0051] See also Figure 1-Figure 6 This embodiment discloses a high power amplification system, including a chassis 101, a mounting plate 102 disposed inside the chassis 101, and this embodiment further includes a first signal transmission unit 103 and a second signal transmission unit 104 disposed inside the chassis 101.

[0052] The first signal transmission unit 103 and the signal transmission unit 104 are both mounted on the mounting plate 102 , and the first signal transmission unit 103 is located on the lower surface of the mounting plate 102 , and the second signal transmission unit 104 is located above the mounting plate 102 ;

[0053] The mounting plate 102 is provided with a connection hole, and the first signal transmission unit 103 passes through the connection hole and is connected to the second signal transmission unit 104; a liquid cooling unit is provided inside the mounting plate 102, and the mounting plate 102 is made of heat-conducting material.

[0054] In actual use, the interior of the chassis 101 is divided into two areas by the installation plate 102, and the first signal transmission unit 103 and the second signal transmission unit 104 are respectively arranged in the two areas, so that the first signal transmission unit 103 is located on the lower surface of the installation plate 102. Since a liquid cooling unit is arranged inside the installation plate 102, the first signal transmission unit 103 and the second signal transmission unit can be cooled at the same time, making the internal layout of the chassis 101 more reasonable, and the first signal transmission unit 103 and the second signal transmission unit can be cooled at the same time, thereby improving the overall heat dissipation effect.

[0055] The mounting plate 102 is made of heat-conducting aluminum plate.

[0056] In actual use, the liquid cooling unit includes a refrigerator, a pump, a heat exchange tube and a refrigerant. The heat exchange tube has a continuous S-shaped structure as a whole and is arranged inside the mounting plate. The heat exchange tube is connected to the refrigerator through a pump. The refrigerant is located in the heat exchange tube. In actual use, the refrigerator is used to cool the refrigerant. Under the action of the pump, the refrigerant circulates between the heat exchange tube and the refrigerator to quickly take away the heat on the mounting plate 102, thereby achieving the purpose of rapid heat dissipation.

[0057] Furthermore, in some preferred implementation cases, a plurality of interconnected flow channels 105 are provided inside the mounting plate 102, and the flow channels 105 are connected to the refrigerator and the pump, so that the refrigerant is in direct contact with the mounting plate 102, thereby improving the heat exchange efficiency.

[0058] The first signal transmission unit 103 includes a preamplifier module 106, a low-power isolator 107, a first driver module 108, a high-power isolator 109, a multi-channel power splitter 110, a second driver module 111, an isolator 112, and a multi-channel synthesizer 113.

[0059] Each output end of the multi-way power splitter 110 is connected to the second driving submodule 111, the second driving submodule 111 is connected to the input end of the multi-way synthesizer 113 through the isolator 112, the output end of the multi-way synthesizer 113 is connected to the second signal transmission unit 104 through the twist waveguide 125, and after the pre-amplifier module 106, the low-power isolator 107, the first driving submodule 108, and the high-power isolator 109 are connected in sequence, the high-power isolator 109 is connected to the input end of the multi-way power splitter 110.

[0060] It is further defined that the multi-way power splitter 110 is a 4-way power splitter, and the multi-way combiner 113 is a 4-way combiner.

[0061] In actual use, the second signal transmission unit 104 includes a first curved waveguide 114, a second curved waveguide 116, a high-power radial power divider 117, a small power amplifier module 118, a high-power isolator 119, a high-power radial synthesizer 120, a third curved waveguide 121, a waveguide filter 122, and a waveguide dual directional coupler 123, wherein the first curved waveguide 114, the second curved waveguide 116, the high-power radial power divider 117, the small power amplifier module 118, the high-power isolator 119, the high-power radial synthesizer 120, the third curved waveguide 121, and the waveguide filter 122 are connected in sequence.

[0062] Wherein, a waveguide single directional coupler 115 is provided between the first curved waveguide 114 and the second curved waveguide 116;

[0063] The output end of the waveguide filter 122 is connected to a waveguide dual directional coupler 123 , and a third curved waveguide 121 is arranged between the dual directional coupler and the high-power radial synthesizer 120 .

[0064] The high-power radial power divider 117 is the C-band high-power radial synthesis described in the first embodiment.

[0065] Furthermore, the high-power radial power divider 117 is connected to the final-stage power amplifier module via a radio frequency cable.

[0066] The high-power radial combiner 120 is a 16-channel high-power radial combiner 120 , and the high-power radial power divider 117 is a 16-channel high-power radial power divider 117 .

[0067] Furthermore, the output power of the power amplifier module 118 is 200W.

[0068] The input end of the 16-channel high-power radial synthesizer 120 uses an N-type connector, and the output end is a BJ70 waveguide port output.

[0069] In order to facilitate those skilled in the art to further understand the present invention, the present invention is further described below in conjunction with specific implementation cases.

[0070] The RF small signal first passes through the first signal transmission unit 103, and the RF small signal is input to the pre-amplification module 106 for signal amplification. The pre-amplification module signal coupling port is mainly used to detect the presence or absence of an external input signal;

[0071] The amplified signal passes through the low-power isolator 107, which is mainly used to match the front and rear amplification modules and prevent signal reflection;

[0072] Then the signal enters the first driving module 108 for amplification again, passes through the high-power isolator 109, and is distributed to the four second driving modules 111 through a 4-way power divider for further signal amplification. After passing through the four isolators 112, the signal is synthesized by the 4-way synthesizer and output to the twisted waveguide 125. The E-plane and H-plane of the waveguide are converted through the twisted waveguide 125. In actual use, the single directional coupler can also change direction after conversion through the twisted waveguide 125, making full use of the space of the chassis 101, thereby reducing the size of the whole machine.

[0073] After passing through the first curved waveguide 114, the signal enters the waveguide single directional coupler. The single directional coupler port is mainly used to detect whether the power of the second driving module 111 reaches the power required by the power amplifier module 118. When the power of the whole system is insufficient, it is convenient to determine the location of the fault.

[0074] After passing through the second curved waveguide 116, it is input to the 16-way directional power divider, and the signal is distributed to the 16-way power amplifier small module 118 through the RF cable for final signal amplification. After passing through the first high-power isolator 119, it is passed through the 16-way high-power radial synthesizer 120 for high-power synthesis and then outputs the required high-power signal; the final high-power signal passes through the third curved waveguide 121 and the waveguide filter 122, and then passes through the waveguide dual-directional coupler 123 (the forward port of the dual-directional coupler is mainly for detecting the size of the final output power, and the reverse port of the dual-directional coupler is mainly for detecting the size of the reflected power), and finally connected to the antenna, and the signal is transmitted through the antenna.

[0075] In practice, the high-power radial power divider 117 is installed in the chassis 101 through the metal bracket 124 to prevent the high-power radial power divider 117 from falling.

[0076] In addition, this embodiment also discloses the application of a C-band high-power radial synthesizer, which is used for broadcast television satellite communications.

[0077] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Application of C-band high-power radial synthesizer in broadcast and television satellite communications, characterized by: The C-band high-power radial synthesizer used in broadcast and television satellite communications includes a housing and a matching truncated cone placed in the housing, and a plurality of coaxial-waveguide step transitions and coaxial ports evenly distributed on the side of the matching truncated cone; Wherein, one coaxial-waveguide step transition corresponds to one coaxial port and the two are connected to each other, and the coaxial port is mounted on the housing; The shell is provided with a waveguide synthesis port connected to the matching circular frustum, and a stepped output impedance matching ladder is provided in the waveguide synthesis port, and the output impedance matching ladder is connected to the matching circular frustum through a channel; The input RF signal with equal amplitude and phase is fed into the coaxial-waveguide step conversion through the coaxial port. The signal continues to be matched from the coaxial-waveguide step conversion through the matching cone, and is simultaneously transmitted to the radial line of the central channel. After being matched through the output impedance matching ladder, it is output from the waveguide synthesis port to achieve high-power synthesis.

2. The application of the C-band high-power radial synthesizer in broadcast and television satellite communications according to claim 1 is characterized in that: There are 16 coaxial ports, and the coaxial ports use N-type connectors.

3. The application of the C-band high-power radial synthesizer in broadcast and television satellite communications according to claim 2 is characterized in that: The waveguide output port of the waveguide synthesis port adopts BJ70 waveguide port output.

4. The application of the C-band high-power radial synthesizer in broadcast and television satellite communications according to claim 2 is characterized in that: The C-band high-power radial synthesizer is used to be installed on a mounting plate inside the chassis; A first signal transmission unit and a second signal transmission unit are arranged in the chassis; The first signal transmission unit and the second signal transmission unit are both mounted on the mounting plate, and the first signal transmission unit is located on the lower surface of the mounting plate, and the second signal transmission unit is located above the mounting plate; A connecting hole is arranged on the mounting plate, and the first signal transmission unit is connected with the second signal transmission unit after passing through the connecting hole; a liquid cooling unit is arranged inside the mounting plate, and the mounting plate is made of heat-conducting material.

5. The application of the C-band high-power radial synthesizer in broadcast and television satellite communications according to claim 4 is characterized in that: The second signal transmission unit includes a first curved waveguide, a second curved waveguide, a high-power radial power divider, a small power amplifier module, a high-power isolator, a high-power radial synthesizer, a third curved waveguide, a waveguide filter, and a waveguide dual directional coupler, wherein the first curved waveguide, the second curved waveguide, the high-power radial power divider, the small power amplifier module, the high-power isolator, the high-power radial synthesizer, the third curved waveguide, and the waveguide filter are connected in sequence. Wherein, a waveguide single directional coupler is arranged between the first curved waveguide and the second curved waveguide; The output end of the waveguide filter is connected to a waveguide dual directional coupler, and the third curved waveguide is arranged between the dual directional coupler and the high-power radial synthesizer; The power radial synthesizer is the C-band high-power radial synthesizer.

6. The application of the C-band high-power radial synthesizer in broadcast and television satellite communications according to claim 5 is characterized in that: The high-power radial power divider is connected to the final-stage power amplifier module through a radio frequency cable.

7. The application of the C-band high-power radial synthesizer in broadcast and television satellite communications according to claim 5 is characterized in that: The first signal transmission unit includes a pre-amplifier module, a low-power isolator, a first drive module, a high-power isolator, a multi-channel power divider, a second drive module, an isolator, and a multi-channel synthesizer. Each output end of the multi-channel power splitter is connected to the second driving submodule, the second driving submodule is connected to the input end of the multi-channel synthesizer through an isolator, the output end of the multi-channel synthesizer is connected to the second signal transmission unit through a twist waveguide, and after the pre-amplifier module, the low-power isolator, the first driving submodule, and the high-power isolator are connected in sequence, the high-power isolator is connected to the input end of the multi-channel power splitter.

8. The application of the C-band high-power radial synthesizer in broadcast and television satellite communications according to claim 7 is characterized in that: The multi-way power splitter is a 4-way power splitter, and the multi-way combiner is a 4-way combiner.

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