Novel cavity dual-local-oscillator dual-polarization four-output frequency demultiplier
By designing a downswitch with a new cavity structure, the reflector rod is cancelled, which solves the problems of difficult production, poor product consistency and high cost of existing downswitches, and achieves higher signal reception strength and lower production costs.
Patent Information
- Application Number
- CN202421617527.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-09
AI Technical Summary
During the down frequency reduction process, existing down frequency converters require reflectors to distinguish signals, resulting in high production difficulty, poor product consistency and high cost.
A new type of cavity dual local oscillator dual-polarized quad-output downriver was designed. Through the structural design of circular and square cavity, the reflective rod was cancelled, and the signal entered the square cavity from the circular cavity and reflected into the antenna to achieve signal isolation.
It reduces the assembly difficulty of the frequency downsizer, improves the consistency and stability of the product, enhances the signal reception strength, and reduces production costs, and realizes the function of using multiple devices at the same time.
Smart Images
Figure CN222814559U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a novel cavity dual-local oscillator dual-polarization four-output downconverter. Background Art
[0002] In satellite services, signals of various frequency bands are needed to transmit data. The frequency band allocation for satellite services is managed by the International Telecommunication Union (ITU). The ITU divides the world into three regions. Within these regions, frequency bands are allocated to various satellite services, but the same given service may use different frequency bands in different regions. Currently, the most commonly used frequency bands for satellite services are the C (4-8GHz) and KU (12-18GHz) bands, and the KA (27-40GHz) band is a rising star. The C band is used for fixed satellite services, usually 6 / 4GHz is expressed as uplink and downlink frequencies; the KU band is used for fixed satellite services and live broadcast satellite services, and 12-14GHz (14 / 12GHz) is most commonly used.
[0003] Ku band has high frequency and high gain, and the antenna size is small, which is easy to install, thus effectively reducing the reception cost and facilitating individual reception. It is relatively less affected by ground interference, so it is particularly suitable for mobile emergency communication services such as mobile communication and static communication, satellite news gathering SNG and DTH services.
[0004] When using the KU frequency band for signal transmission and reception, a down-converter is required to perform the frequency reduction operation. However, the current down-converter needs to rely on a reflector rod as a signal reflection area to separate the horizontal and vertical signals when performing the frequency reduction operation. The setting of the reflector rod not only increases the difficulty of the production and assembly of the down-converter, but also results in poor product consistency and instability. Moreover, the reflector rod affects the reception of the signal by the down-converter. Although the setting of the reflector rod enables the down-converter to isolate the high signal, the cost is relatively high, thereby increasing the production cost of the down-converter. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the defects of poor product consistency, great assembly difficulty and high production cost in the prior art, and to provide a novel cavity dual local oscillator dual polarization four-output downconverter.
[0006] The utility model solves the above technical problems through the following technical solutions:
[0007] The utility model provides a novel cavity dual local oscillator dual polarization four-output downconverter, comprising a downconverter housing, a downconverter compartment and a downconverter pull cover, wherein the downconverter housing and the downconverter pull cover are installed outside the downconverter compartment;
[0008] The frequency converter compartment is provided with four rectangular output terminals, and the frequency converter housing and the frequency converter cover are provided with corresponding openings for installing the output terminals;
[0009] The downconverter housing and the downconverter pull cover form a circular cavity and a square cavity which are interconnected.
[0010] In this technical solution, the signal of the KU frequency band enters the downconverter, and in the downconverter, the signal enters the square cavity from the circular cavity, and enters the product antenna through the reflection of the square cavity, that is, the signal is reflected by the cavity to isolate the high signal, and the transmission reflection rod is cancelled, which not only reduces the difficulty of downconverter assembly, makes the consistency of downconverter products better and more stable, and improves the strength of the downconverter receiving signal, but also solves the problem of high signal isolation at a lower cost;
[0011] At the same time, four output ports are set up to facilitate the use of multiple receiving devices at the same time.
[0012] Preferably, the downconverter compartment is arranged in a square cavity.
[0013] In this technical solution, the downconverter compartment is used to improve the signal reception strength.
[0014] Preferably, the downconverter housing comprises a waveguide and a square shell, and one side of the waveguide is connected to one end of the square shell.
[0015] In the technical solution, a circular or square cavity can be formed by utilizing the downconverter housing and the downconverter pull cover.
[0016] Preferably, the downconverter housing further comprises a speaker port, and the speaker port is connected to an end of the waveguide away from the square housing.
[0017] In this technical solution, the speaker port is used to receive signals in the KU frequency band.
[0018] Preferably, the inner wall of the horn port is connected to a plurality of fixing plates distributed in a circular array.
[0019] Preferably, the fixing plate is in a right triangle structure, and two right angles of the right triangle are connected to the inner wall of the horn port.
[0020] In this technical solution, the fixing plate can increase the structural strength of the horn port.
[0021] Preferably, the cross-sections of the waveguide and the horn port are both circular structures, and the diameter of the waveguide is smaller than the diameter of the horn port.
[0022] Preferably, an auxiliary fixing assembly is arranged on the outside of the waveguide, and the auxiliary fixing assembly comprises a threaded sleeve, and the threaded sleeve is threadedly connected to the surface of the waveguide;
[0023] A limiting ring is fixedly connected to the side surface of the threaded sleeve, and the limiting ring is in inseparable contact connection with the inner side of one end of the fixing bracket;
[0024] The other end of the fixed bracket is a U-shaped structure, the inner wall of the U-shaped structure is fixedly connected with a connecting shaft, and the surface of the connecting shaft is slidably connected with the rotating column;
[0025] One end of the rotating column is rotatably connected to the surface of the first fixed shaft, and one side of the first fixed shaft is connected to the surface of the waveguide;
[0026] The other end of the rotating bar is rotatably connected to a second fixed shaft, and one end of the second fixed shaft is connected to one side of the mounting plate.
[0027] In the technical solution, the auxiliary fixing assembly is used to increase the stability of the connection between the speaker port and other devices and prevent loosening.
[0028] Preferably, the first fixed shaft and the second fixed shaft are both composed of a central shaft and side connecting plates, both ends of the central shaft are fixedly connected with side plates, and the surface of the central shaft is rotatably connected to the end surface of the rotating column.
[0029] In the technical solution, the first fixed shaft and the second fixed shaft are used to enable the rotating column to rotate along with the movement of the connecting shaft.
[0030] Preferably, the mounting plate is provided with a plurality of mounting holes.
[0031] In the technical solution, the mounting plate can be mounted on other fixed bodies by utilizing the mounting holes.
[0032] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.
[0033] The positive and progressive effects of the utility model are:
[0034] In the utility model, a signal in the KU frequency band enters a downconverter, and in the downconverter, the signal enters a square cavity from a circular cavity, and enters a product antenna through reflection of the square cavity, that is, the signal is reflected by the cavity to isolate the high signal, and the transmission reflection rod is eliminated, which not only reduces the difficulty of assembling the downconverter, but also makes the consistency of the downconverter product better and more stable, and improves the strength of the received signal of the downconverter, and solves the problem of high signal isolation at a lower cost, and four output terminals are provided at the same time, which can facilitate the simultaneous use of multiple receiving devices. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 It is a structural schematic diagram of a novel cavity dual local oscillator dual polarization four-output downconverter according to an embodiment of the utility model.
[0036] Figure 2 for Figure 1The schematic diagram of the front structure of the downconverter casing of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0037] Figure 3 for Figure 1 The schematic diagram of the structure on the back of the downconverter casing of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0038] Figure 4 for Figure 1 The schematic diagram of the internal side view of the downconverter casing of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0039] Figure 5 for Figure 1 The schematic diagram of the structure of the downconverter casing of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0040] Figure 6 for Figure 1 The structure of the downconverter casing of the novel cavity dual local oscillator dual polarization four-output downconverter is shown in FIG.
[0041] Figure 7 for Figure 1 The schematic diagram of the front three-dimensional structure of the downconverter compartment of the new cavity dual local oscillator dual polarization four-output downconverter is shown.
[0042] Figure 8 for Figure 1 The three-dimensional structural schematic diagram of the back side of the downconverter compartment of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0043] Fig. 9 for Figure 1 The schematic diagram of the internal structure of the front side of the downconverter compartment of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0044] Fig.10 for Figure 1 The schematic diagram of the internal structure on the back of the downconverter compartment of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0045] Fig.11 for Figure 1 The structure of the interior of the downconverter compartment of the novel cavity dual local oscillator dual polarization four-output downconverter shown is a top-down view.
[0046] Fig.12 for Figure 1 The three-dimensional structure schematic diagram of the front side of the new cavity dual local oscillator dual polarization four-output downconverter is shown.
[0047] Fig.13 for Figure 1 The three-dimensional structure schematic diagram of the back side of the pull-cover of the new cavity dual local oscillator dual polarization four-output downconverter is shown.
[0048] Fig.14 for Figure 1 The schematic diagram of the internal structure of the new cavity dual local oscillator dual polarization four-output downconverter shown in the front of the downconverter cover.
[0049] Fig.15 for Figure 1 The schematic diagram of the internal structure of the back side of the pull-down cover of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0050] Fig.16 for Figure 1 The structure of the auxiliary fixed components of the novel cavity dual local oscillator dual polarization four-output downconverter is shown.
[0051] Description of Reference Numerals
[0052] 1. Downconverter housing; 11. Waveguide; 12. Square housing; 13. Speaker port; 14. Fixing plate;
[0053] 2. Downconverter compartment;
[0054] 3. Remove the cover of the frequency converter;
[0055] 4. Output terminal;
[0056] 5. Auxiliary fixing assembly; 51. Threaded sleeve; 52. Limiting ring; 53. Fixed bracket; 54. Connecting shaft; 55. Rotating bar; 56. First fixed shaft; 57. Second fixed shaft; 58. Mounting plate. DETAILED DESCRIPTION
[0057] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.
[0058] Figures 1 to 16 The structure diagram of an embodiment of the novel cavity dual local oscillator dual polarization four-output downconverter of the utility model is shown. The novel cavity dual local oscillator dual polarization four-output downconverter comprises a downconverter housing 1, a downconverter compartment 2 and a downconverter pull cover 3, wherein the downconverter housing 1 and the downconverter pull cover 3 are installed on the outside of the downconverter compartment 2;
[0059] The frequency converter compartment 2 is provided with four rectangular output terminals 4, and the frequency converter housing 1 and the frequency converter cover 3 are provided with corresponding openings for installing the output terminals 4;
[0060] The downconverter housing 1 and the downconverter cover 3 form a circular cavity and a square cavity which are interconnected.
[0061] In this technical solution, the signal of the KU frequency band enters the downconverter, and in the downconverter, the signal enters the square cavity from the circular cavity, and enters the product antenna through the reflection of the square cavity, that is, the signal is reflected by the cavity to isolate the high signal, and the transmission reflection rod is cancelled, which not only reduces the difficulty of downconverter assembly, makes the consistency of downconverter products better and more stable, and improves the strength of the downconverter receiving signal, but also solves the problem of high signal isolation at a lower cost;
[0062] At the same time, four output ports are set up to facilitate the use of multiple receiving devices at the same time.
[0063] The frequency converter compartment 2 is arranged in a square cavity.
[0064] In this technical solution, the downconverter compartment 2 is used to improve the signal reception strength.
[0065] The downconverter housing 1 comprises a waveguide 11 and a square housing 12 , and one side of the waveguide 11 is connected to one end of the square housing 12 .
[0066] In the technical solution, a circular or square cavity can be formed by using the downconverter housing 1 and the downconverter cover 3 .
[0067] The downconverter housing 1 further comprises a speaker port 13 , and the speaker port 13 is connected to an end of the waveguide 11 away from the square housing 12 .
[0068] In this technical solution, the speaker port 13 is used to receive signals in the KU frequency band.
[0069] The inner wall of the horn port 13 is connected to a plurality of fixing plates 14 distributed in a circular array.
[0070] The fixing plate 14 is in a right triangle structure, and two right angles of the right triangle are connected to the inner wall of the horn port 13 .
[0071] In the present technical solution, the fixing plate 14 can increase the structural strength of the horn port 13 .
[0072] The cross sections of the waveguide 11 and the horn port 13 are both circular structures, and the diameter of the waveguide 11 is smaller than the diameter of the horn port 13 .
[0073] A circuit module is arranged in the downconverter, and the circuit module includes a KU frequency band vertical polarization dielectric antenna part, a KU frequency band horizontal polarization dielectric antenna part and a circuit unit;
[0074] The circuit unit includes an antenna signal input terminal, a first-stage amplifier circuit, a second-stage amplifier circuit, a third-stage amplifier circuit, a first filter, a distributor, a control circuit, an oscillating circuit, an IF amplifier circuit, a first post-stage amplifier circuit, a second filter, a second post-stage amplifier circuit, a receiver and a power supply circuit for providing a working voltage. After receiving a signal, the antenna signal input terminal sequentially inputs the signal to the distributor through the first-stage amplifier circuit, the second-stage amplifier circuit, the third-stage amplifier circuit and the first filter, and obtains the required signal after three signal amplifications and filtering; the distributor outputs the required signal, the control circuit is electrically connected to the first-stage amplifier circuit, the second-stage amplifier circuit, the third-stage amplifier circuit and the oscillating circuit respectively, and the output terminal of the distributor is sequentially connected to the IF amplifier circuit, the first post-stage amplifier circuit, the second filter, the second post-stage amplifier circuit and the receiver.
[0075] After the signal is received by the antenna signal input terminal, the weak signal is amplified by the first-stage amplifier circuit, the second-stage amplifier circuit and the third-stage amplifier circuit. The first-stage amplifier circuit includes receiving sensitivity and gain amplification, while the second-stage amplifier circuit and the third-stage amplifier circuit strengthen the signal amplification.
[0076] The function of the first high-pass filter is to filter out unnecessary peripheral signals and retain only the required signals.
[0077] The distributor inputs vertical signals and horizontal signals into the distributor's input terminal and outputs the signals from the output terminal.
[0078] The second low-pass filter has the function of filtering out more unnecessary signals and adjusting the flatness of the signal.
[0079] The receiver modulates the high-frequency head output signal and down-converts it twice to make it within the TV frequency reception range. It also switches the supply voltage required.
[0080] An auxiliary fixing assembly 5 is disposed outside the waveguide 11, and the auxiliary fixing assembly 5 includes a threaded sleeve 51, and the threaded sleeve 51 is threadedly connected to the surface of the waveguide 11;
[0081] The threaded sleeve 51 is fixedly connected to a limiting ring 52 on its side, and the limiting ring 52 is in inseparable contact connection with the inner side of one end of a fixing bracket 53; a plurality of fixing brackets 53 distributed in a circular array are arranged on the surface of the limiting ring 52;
[0082] The other end of the fixed bracket 53 is a U-shaped structure, and a connecting shaft 54 is fixedly connected to the inner wall of the U-shaped structure. The surface of the connecting shaft 54 is slidably connected with the rotating bar 55;
[0083] One end of the rotating column 55 is rotatably connected to the surface of the first fixed shaft 56, and one side of the first fixed shaft 56 is connected to the surface of the waveguide 11;
[0084] The other end of the rotating column 55 is rotatably connected to a second fixed shaft 57 , and one end of the second fixed shaft 57 is connected to one side of a mounting plate 58 .
[0085] In the present technical solution, the auxiliary fixing assembly 5 can be used to increase the stability of the connection between the speaker port 13 and other devices and prevent loosening.
[0086] The first fixed shaft 56 and the second fixed shaft 57 are both composed of a central shaft and side connecting plates. Both ends of the central shaft are fixedly connected to the side plates. The surface of the central shaft is rotatably connected to the end surface of the rotating column 55.
[0087] In the present technical solution, the first fixed shaft 56 and the second fixed shaft 57 are used to enable the rotating column 55 to rotate along with the movement of the connecting shaft 54 .
[0088] The mounting plate 58 is provided with a plurality of mounting holes.
[0089] In this technical solution, the mounting plate 58 can be mounted on other fixed bodies by using the mounting holes.
[0090] When in use, according to the position of other fixed bodies such as the signal emitting device housing when the speaker port 13 is connected, the threaded sleeve 51 is rotated to make the threaded sleeve 51 move along the waveguide 11, thereby driving the limit ring 52 to move in the same direction. At this time, the fixed bracket 53 and the connecting shaft 54 can be driven to move in the same direction, and then the connecting shaft 54 can slide at the rotating column 55. At this time, the rotating column 55 is rotated around the first fixed axis 56, thereby driving the second fixed axis 57 and the mounting plate 58 to rotate, and the position of the mounting plate 58 is adjusted. At the same time, the mounting plate 58 can be rotated by using the second fixed axis 57, so that the mounting plate 58 can rotate around one end of the rotating column 55, and the angle of the rotating column 55 is adjusted to facilitate the connection between the mounting plate 58 and the fixed body. Finally, the mounting plate 58 is connected to the fixed body by bolts, thereby limiting the position of the speaker port 13, and fixing the position of the downconverter, thereby increasing the stability of the downconverter when in use.
[0091] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.
Claims
1. A novel cavity dual local oscillator dual polarization four-output downconverter, characterized by: It comprises a frequency converter housing (1), a frequency converter compartment (2) and a frequency converter pull-out cover (3), wherein the frequency converter housing (1) and the frequency converter pull-out cover (3) are installed on the outside of the frequency converter compartment (2); The frequency converter compartment (2) is provided with four rectangular output terminals (4), and the frequency converter housing (1) and the frequency converter cover (3) are correspondingly provided with openings for installing the output terminals (4); The downconverter housing (1) and the downconverter pull cover (3) form a circular cavity and a square cavity which are interconnected.
2. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 1, characterized in that: The frequency-down converter compartment (2) is arranged in a square cavity.
3. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 1, characterized in that: The downconverter casing (1) comprises a waveguide (11) and a square shell (12), and one side of the waveguide (11) is connected to one end of the square shell (12).
4. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 3, characterized in that: The downconverter housing (1) further comprises a speaker port (13), wherein the speaker port (13) is connected to an end of the waveguide (11) away from the square housing (12).
5. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 4, characterized in that: The inner wall of the horn port (13) is connected to a plurality of fixing plates (14) distributed in a ring array.
6. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 5, characterized in that: The fixing plate (14) is in the form of a right triangle, and the two right angles of the right triangle are connected to the inner wall of the horn port (13).
7. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 3, characterized in that: The cross sections of the waveguide (11) and the horn port (13) are both circular structures, and the diameter of the waveguide (11) is smaller than the diameter of the horn port (13).
8. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 3, characterized in that: An auxiliary fixing assembly (5) is arranged outside the waveguide (11), and the auxiliary fixing assembly (5) comprises a threaded sleeve (51), and the threaded sleeve (51) is threadedly connected to the surface of the waveguide (11); A limiting ring (52) is fixedly connected to the side surface of the threaded sleeve (51), and the limiting ring (52) is in inseparable contact connection with the inner side of one end of the fixing bracket (53); The other end of the fixed bracket (53) is a U-shaped structure, the inner wall of which is fixedly connected with a connecting shaft (54), and the surface of the connecting shaft (54) is slidably connected with the rotating bar (55); One end of the rotating column (55) is rotatably connected to the surface of a first fixed shaft (56), and one side of the first fixed shaft (56) is connected to the surface of a waveguide (11); The other end of the rotating column (55) is rotatably connected to a second fixed shaft (57), and one end of the second fixed shaft (57) is connected to one side of a mounting plate (58).
9. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 8, characterized in that: The first fixed shaft (56) and the second fixed shaft (57) are both composed of a central shaft and side connecting plates, both ends of the central shaft are fixedly connected to the side plates, and the surface of the central shaft is rotatably connected to the end surface of the rotating column (55).
10. The novel cavity dual local oscillator dual polarization four-output downconverter as claimed in claim 8, characterized in that: The mounting plate (58) is provided with a plurality of mounting holes.