CN210578952U - KU double-local-oscillator expansion type broadband double-output frequency demultiplier - Google Patents
KU double-local-oscillator expansion type broadband double-output frequency demultiplier Download PDFInfo
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- CN210578952U CN210578952U CN201921468495.5U CN201921468495U CN210578952U CN 210578952 U CN210578952 U CN 210578952U CN 201921468495 U CN201921468495 U CN 201921468495U CN 210578952 U CN210578952 U CN 210578952U
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Abstract
The utility model discloses a KU double local oscillator extended broadband double-output frequency demultiplier, which comprises a horizontal polarization module, a vertical polarization module, a first distributor, a second distributor and at least one multi-way switch; the horizontal/vertical polarization modules comprise polarization receivers, amplification modules, filters, phase locking modules and output modules, and the polarization receivers, the amplification modules, the filters, the phase locking modules and the output modules are connected in sequence; the output module of the horizontal polarization module is connected with the first distributor; the output module of the vertical polarization module is connected with the second distributor; the multi-way switch is connected with the first distributor and the second distributor respectively. The design concept of independent work of the two phase locking modules adopts the modes of different local oscillator frequencies to manage vertical and horizontal polarized signal reception respectively, the installation is simple, the cost performance is high, the installation area space is effectively reduced, a satellite receiving antenna pot is shared by multiple users, and the full-frequency-band coverage of high local oscillator/low local oscillator is realized.
Description
Technical Field
The utility model relates to the field of electronics, especially a KU two local oscillator extension formula broadband dual output frequency demultiplier.
Background
With the development of science and technology and life, communication transmission is more and more popular, and the proportion of satellite television watching in families is higher and higher. The frequency demultiplier is a necessary device for watching satellite television, but the products of the KU-band frequency demultiplier on the market have the noise-proof and anti-interference capability and the output function, which can not meet the requirements of customers. With the popularization of satellite televisions, an LNBF can only be used by a single user terminal to watch full-band television programs, and the requirements of the users are increasingly not met.
Because of the limitation of the design structure of the traditional satellite frequency demultiplier, when a user uses the satellite television receiver to receive the satellite television program with the 950MHz-2150MHz intermediate frequency channel, one satellite frequency demultiplier can only be used by one user, namely single-port output. If one satellite frequency demultiplier is required to be shared by multiple users, two methods are commonly used in the market at present; 1. a four output LNBF is employed. 2. And a multi-way switch is adopted for expansion. However, the LNB currently configured in the market can only be applied to a single local oscillator, which may cause a part of the viewable programs to be lost, and reduce the user experience.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, an object of the utility model is to provide a KU two local oscillator extension formula broadband dual output frequency demultiplier, the installation is simple, the sexual valence relative altitude, effectively reduces the installation area space, reaches satellite receiving antenna pot of multi-user sharing, realizes the full frequency channel of high local oscillator/low local oscillator and covers.
The utility model provides a technical scheme that its problem adopted is:
according to the utility model provides a KU two local oscillator extension formula broadband dual output frequency demultiplier, including horizontal polarization module, vertical polarization module, first distributor, second distributor and at least one multi-way switch;
the horizontal polarization module comprises a horizontal polarization receiver, a first amplification module, a first filter, a first phase locking module and a first output module, and the horizontal polarization receiver, the first amplification module, the first filter, the first phase locking module and the first output module are sequentially connected;
the vertical polarization module comprises a vertical polarization receiver, a second amplification module, a second filter, a second phase locking module and a second output module, and the vertical polarization receiver, the second amplification module, the second filter, the second phase locking module and the second output module are sequentially connected;
the first output module is connected with the first distributor;
the second output module is connected with the second distributor;
the multi-way switch is connected with the first distributor and the second distributor respectively.
The KU double-local-oscillator extended broadband double-output frequency demultiplier has the following beneficial effects that: the design concept of independent work of the two phase locking modules adopts the modes of different local oscillator frequencies to manage vertical and horizontal polarized signal reception respectively, the installation is simple, the cost performance is high, the installation area space is effectively reduced, a satellite receiving antenna pot is shared by multiple users, and the full-frequency-band coverage of high local oscillator/low local oscillator is realized.
According to the utility model provides a pair of two local oscillator extension formula broadband dual output frequency demultipliers of KU still includes third electric capacity and twelfth electric capacity, first amplifier module includes first amplifier circuit and second amplifier circuit, first amplifier circuit through third capacitive coupling extremely second amplifier circuit, second amplifier module includes third amplifier circuit and fourth amplifier circuit, third amplifier circuit through twelfth capacitive coupling extremely fourth amplifier circuit.
According to the utility model provides a pair of two local oscillator extension formula broadband dual output frequency demultipliers of KU, first phase locking module includes first phase locking chip and first crystal oscillator, second phase locking module includes second phase locking chip and second crystal oscillator.
According to the utility model provides a pair of two local oscillator extension broadband dual output frequency demultipliers of KU, the model of first phase-locked chip is RDA3566E, the model of second phase-locked chip is RDA 3566E.
According to the utility model provides a pair of two local oscillator extension formula broadband dual output frequency demultipliers of KU, first wave filter is first high pass filter, the second wave filter is second high pass filter.
According to the utility model provides a pair of two local oscillator extension formula broadband dual output frequency demultipliers of KU still includes fourth electric capacity and thirteenth electric capacity, second amplifier circuit passes through fourth capacitive coupling is to first wave filter, fourth amplifier circuit is through thirteenth capacitive coupling to second wave filter.
The utility model provides a pair of two local oscillator extension broadband dual output frequency demultipliers of KU still includes fifth electric capacity, first lock looks chip includes RFin pin, X1 pin, X2 pin, IF pin, X1 pin passes through first crystal oscillator is connected to X2 pin, RFin pin and first wave filter are connected, the IF pin passes through fifth electric capacity is connected to first output module.
The utility model provides a pair of KU two local oscillator extension formula broadband dual output frequency demultipliers still includes the fourteenth electric capacity, second phase-locked chip includes RFin2 pin, X21 pin, X22 pin, IF2 pin, X21 pin passes through the second crystal oscillator is connected to X22 pin, RFin2 pin is connected with the second filter, the IF pin passes through the fourteenth electric capacity is connected to second output module.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic diagram of an embodiment of a KU dual local oscillator extended broadband dual output frequency demultiplier of the present invention;
fig. 2 is a schematic diagram of a circuit module according to an embodiment of the KU dual local oscillator extended broadband dual output down converter of the present invention;
fig. 3 is a schematic diagram of a horizontal polarization module according to an embodiment of the KU dual local oscillator extended broadband dual output down converter of the present invention;
fig. 4 is the utility model relates to a KU two local oscillator extension formula broadband dual output frequency demultiplier embodiment's vertical polarization module's schematic diagram.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 to 4, an embodiment of the present invention provides a KU dual local oscillator extended broadband dual output down converter, including a horizontal polarization module, a vertical polarization module, a first distributor, a second distributor, and at least one multi-way switch; the horizontal polarization module comprises a horizontal polarization receiver 110, a first amplification module, a first filter 130, a first phase-locking module 140 and a first output module 150, wherein the horizontal polarization receiver 110, the first amplification module, the first filter 130, the first phase-locking module 140 and the first output module 150 are sequentially connected; the vertical polarization module comprises a vertical polarization receiver 210, a second amplification module, a second filter 230, a second phase locking module 240 and a second output module 250, wherein the vertical polarization receiver 210, the second amplification module, the second filter 230, the second phase locking module 240 and the second output module 250 are connected in sequence; the first output module 150 is connected with the first distributor; the second output module 250 is connected to the second distributor; the multi-way switch is connected with the first distributor and the second distributor respectively. The design concept of independent work of the two phase locking modules adopts the modes of different local oscillator frequencies to manage vertical and horizontal polarized signal reception respectively, the installation is simple, the cost performance is high, the installation area space is effectively reduced, a satellite receiving antenna pot is shared by multiple users, and the full-frequency-band coverage of high local oscillator/low local oscillator is realized.
An embodiment of the utility model provides a two local oscillator extension formula broadband dual output frequency demultipliers of KU still includes third electric capacity and twelfth electric capacity, and first amplifier module includes first amplifier circuit 121 and first amplifier circuit 122, and first amplifier circuit 121 passes through third capacitive coupling to first amplifier circuit 122, and second amplifier module includes third amplifier circuit 221 and fourth amplifier circuit 222, and third amplifier circuit 221 passes through twelfth capacitive coupling to fourth amplifier circuit 222.
An embodiment of the utility model provides a two local oscillator extension formula broadband dual output frequency demultipliers of KU, first phase locking module 140 includes first phase locking chip and first crystal oscillator, and second phase locking module 240 includes second phase locking chip and second crystal oscillator.
An embodiment of the utility model provides a two local oscillator extension formula broadband dual output frequency demultipliers of KU, the model of first phase-locked chip is RDA3566E, and the model of second phase-locked chip is RDA 3566E.
An embodiment of the utility model provides a two local oscillator extension formula broadband dual output frequency demultipliers of KU, first wave filter 130 is first high pass filter, and second wave filter 230 is second high pass filter.
An embodiment of the utility model provides a two local oscillator extension formula broadband dual output frequency demultipliers of KU still includes fourth electric capacity and thirteenth electric capacity, and first amplifier circuit 122 passes through fourth capacitive coupling to first wave filter 130, and fourth amplifier circuit 222 passes through thirteenth capacitive coupling to second wave filter 230.
An embodiment of the utility model provides a two local oscillator extension formula broadband dual output frequency demultipliers of KU still includes fifth electric capacity, and first lock looks chip includes RFin pin, X1 pin, X2 pin, IF pin, and X1 pin is connected to X2 pin through first crystal oscillator, and RFin pin is connected with first wave filter 130, and the IF pin is connected to first output module 150 through fifth electric capacity.
An embodiment of the utility model provides a two local oscillator extension formula broadband dual output frequency demultipliers of KU, still include the fourteenth electric capacity, the second phase-locked chip includes RFin2 pin, X21 pin, X22 pin, IF2 pin, and X21 pin is connected to X22 pin through the second crystal oscillator, and RFin2 pin is connected with second filter 230, and the IF pin is connected to second output module 250 through the fourteenth electric capacity.
Technical points of the KU double-local-oscillator extended broadband double-output frequency demultiplier in the above embodiments are described as follows:
1. in the embodiment, the vertical polarization receiver 210 and the horizontal polarization receiver 110 are respectively managed by using a design that two RDA3566E phase-locked chips (i.e., a first phase-locked chip and a second phase-locked chip) work independently and adopting different local oscillator frequencies, and the switching between vertical polarization and horizontal polarization of the conventional LNB needs to be pulled by high and low bits. Receiver terminals in existing market environments, quality are heterogeneous, such as: the power of the receiver terminal is not enough, and the output voltage of the receiver terminal cannot meet the potential switching of 13V and 18V received vertically/horizontally after the receiver terminal is loaded with the LNB, so that the LNB cannot work normally. Meanwhile, the problem that when the Cable transmission distance is too long, the 22K audio signal is lost or too weak to drive the LNB can be solved.
2. The filters (i.e. the first filter 130 and the second filter 230) of the high-narrow frequency comb-type microstrip line different-frequency band pass are used to combine with two independent phase-locked chips RDA3566E to form two independently generated and working local oscillation frequencies: the horizontally polarized module is 9.75GHz and the vertically polarized module is 11.3 GHz. Because the local oscillator adopts an independent integrated phase lock device, two local oscillators with different frequencies have no interference. (avoid the mutual interference between the local oscillators and the frequency multiplication of one or more times caused by signal resonance, etc.). The first output module 150 and the second output module 250 are independently output, and no mutual interference phenomenon caused by any signal cross and other factors exists.
3. The range of working voltage is wide, the voltage can work normally in 10-23V, and meanwhile, the transmission of the received polarization signal is completely controlled by the local frequency, so that signal voltage loss caused by Cable transmission and other reasons can be avoided; the traditional LNB circuit needs a voltage between 14.5V and 15.2 in operation, and has high requirement on precise power supply voltage, so that problems are easy to occur.
4. The 9.75G/11.3G matched double local oscillator matching design is calculated through the distribution of satellite downlink frequency, the full coverage of the frequency of receiving satellite signals from 10.7GHz to 12.75GHz can be realized, and compared with the existing products on the market, the frequency band is widened by utilizing a single local oscillator or a mode to connect an external multi-way switch to realize a multi-user technology. Meanwhile, the problem of bandwidth overlapping of close frequency bands between the horizontal polarization module and the vertical polarization module is solved, and the receiving capability of satellite television programs with wide frequency bands and full frequency bands of 10.7GHz-12.75GHz is achieved.
Referring to fig. 2, a description of a structure and a function of the KU dual local oscillator extended broadband dual output down converter in the above embodiment:
satellite television signals (i.e., signals in the frequency band of 10.7GHz-12.75 GHz) are filtered, and out-of-band frequencies (frequencies before 10.7GHz and after 12.75 GHz) are suppressed and filtered. The signal is received by either the horizontally polarized receiver 110 or the vertically polarized receiver 210; after the first amplification module and the second amplification module, the out-of-band signals are filtered again by the microstrip high-pass filter module, and then processed by the integrated phase-locking modules (i.e., the first phase-locking module 140 and the second phase-locking module 240) to demodulate the required intermediate-frequency signals.
The horizontal polarization module is positioned as the local oscillation frequency: 9.75GHz, when the integrated circuit is appointed to be in a mode of 9.75/10.6 double local oscillator switching; the audio frequency 22K signal detection circuit is disconnected, and the circuit is enabled to work at 9.75GHz all the time, so that a 9.75G local oscillator can be obtained, and a special quartz crystal is not needed to change the frequency of the phase lock.
The vertical polarization module is positioned as the local oscillation frequency: 11.3GHz, using the local oscillator frequency to locate reception of vertical polarization. When a user watches a horizontally polarized program, the receiving module detects a local oscillation signal of 9.75GHz of the LNB, and when the obtained demodulation signals are consistent, the receiver demodulates the complete horizontally polarized satellite television program. When a user watches a vertically polarized program, the receiver equipment detects an 11.3MHz local oscillation signal of the LNB, and when the obtained demodulation signals are consistent; the receiver demodulates the complete satellite TV program with vertical polarization and receives high-definition image quality.
The ports of the horizontal polarization or the vertical polarization of the LNB are respectively connected with the ports of the horizontal polarization or the vertical polarization of the multi-way switch, so that each user side can receive the television programs of the full frequency band.
The operation principle of the circuit in the KU dual-local-oscillator extended broadband dual-output frequency demultiplier in the above embodiment is described as follows:
referring to fig. 3, the satellite signal is inputted to the CKRF7543 chip Q1 of the first amplifier circuit 121 through the horizontal polarization receiver 110 for low noise amplification (VGS voltage thereof is-0.3-0.45V provided by the third resistor R3 for current limiting after being filtered by the second resistor C2, and VDS voltage is +2V provided by the second resistor R2 for current limiting after being filtered by the first capacitor C1). The amplified signal is coupled to a CK8513 chip Q2 (the VGS voltage of the amplified signal is filtered by a seventh capacitor C7 and then provided by a fifth resistor R5 for limiting current, and the VDS is provided by an eighth capacitor C8 for filtering and a sixth resistor R6 for limiting current) in the first amplifying circuit 122 through a third capacitor C3, the amplified signal is effectively amplified again, the secondarily amplified signal is output to a microstrip high-pass first filter 130 through a fourth capacitor C4 for coupling to filter out-of-band signals and noises, clean RF signals are obtained and transmitted to an integrated first phase lock IC1(RDA3566E) to perform phase detection, filtering, oscillation, frequency mixing, operation and the like to obtain a local oscillator of 9.75GHz, the local oscillator is internally amplified to output an intermediate frequency signal with a frequency of 950 MHz-1950 MHz, and the intermediate frequency signal is output through a fifth capacitor C5. The three-terminal voltage of the power supply system IC2 is stabilized at 6V, the IN pin of the power supply system IC2 is connected to the ground through a ninth capacitor C9 for filtering, and the OUT pin of the power supply system IC2 is connected to the ground through a sixth capacitor C6 for filtering.
Referring to fig. 4, the satellite signal is input to the CKRF7543 chip Q3 of the third amplifier circuit 221 through the vertical polarization receiver 210 for low noise amplification (VGS voltage thereof is filtered by an eleventh capacitor C11 and then provided by an eleventh resistor R11 for current limiting, and voltage value is-0.3-0.45V; VDS voltage is filtered by a tenth capacitor C10 and then provided by a tenth resistor R10 for current limiting, and voltage value is +2V), the amplified signal is coupled to the CK8513 chip Q4 of the fourth amplifier circuit 222 through a twelfth capacitor C12 (VGS voltage thereof is filtered by an eighteenth capacitor C18 and then provided by a thirteenth resistor R13 for current limiting, and VDS voltage is provided by a sixteenth capacitor C16 for filtering and a twelfth resistor R12 for current limiting), and the signal is amplified again; the signal after the secondary amplification is output to the second filter 230 with microstrip high pass through a thirteenth capacitor C13 for coupling to filter out-of-band signals and noise, so as to obtain clean RF signals, the clean RF signals are input to the second phase-locked loop IC3(RDA3566E) for phase discrimination, filtering, oscillation, frequency mixing and operation, so as to obtain a local oscillator with a frequency of 11.3GHz, and the local oscillator is internally amplified to output a 950MHz-1450MHz intermediate frequency signal and is output through a fourteenth capacitor C14. The three-terminal voltage of the power supply system IC4 is stabilized at 6V, the IN pin of the power supply system IC4 is connected to the ground through a fifteenth capacitor C15 for filtering, and the OUT pin of the power supply system IC4 is connected to the ground through a seventeenth capacitor C17 for filtering.
Above, only the preferred embodiment of the present invention has been described, the present invention is not limited to the above embodiment, and the technical effects of the present invention can be achieved by the same means, which all belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a two local oscillator extension formula broadband dual output frequency demultipliers of KU which characterized in that: the system comprises a horizontal polarization module, a vertical polarization module, a first distributor, a second distributor and at least one multi-way switch;
the horizontal polarization module comprises a horizontal polarization receiver, a first amplification module, a first filter, a first phase locking module and a first output module, and the horizontal polarization receiver, the first amplification module, the first filter, the first phase locking module and the first output module are sequentially connected;
the vertical polarization module comprises a vertical polarization receiver, a second amplification module, a second filter, a second phase locking module and a second output module, and the vertical polarization receiver, the second amplification module, the second filter, the second phase locking module and the second output module are sequentially connected;
the first output module is connected with the first distributor;
the second output module is connected with the second distributor;
the multi-way switch is connected with the first distributor and the second distributor respectively.
2. The KU dual local oscillator extended broadband dual output frequency demultiplier according to claim 1, wherein: the first amplification module comprises a first amplification circuit and a second amplification circuit, the first amplification circuit is coupled to the second amplification circuit through a third capacitor, the second amplification module comprises a third amplification circuit and a fourth amplification circuit, and the third amplification circuit is coupled to the fourth amplification circuit through a twelfth capacitor.
3. The KU dual local oscillator extended broadband dual output frequency demultiplier according to claim 2, wherein: the first phase locking module comprises a first phase locking chip and a first crystal oscillator, and the second phase locking module comprises a second phase locking chip and a second crystal oscillator.
4. The KU dual local oscillator extended broadband dual output frequency demultiplier according to claim 3, wherein: the first phase-locking chip is of the type RDA3566E, and the second phase-locking chip is of the type RDA 3566E.
5. The KU dual local oscillator extended broadband dual output frequency demultiplier according to claim 2, wherein: the first filter is a first high-pass filter and the second filter is a second high-pass filter.
6. The KU dual local oscillator extended broadband dual output frequency demultiplier according to claim 2, wherein: the second amplifying circuit is coupled to the first filter through the fourth capacitor, and the fourth amplifying circuit is coupled to the second filter through the thirteenth capacitor.
7. The KU dual local oscillator extended broadband dual output frequency demultiplier according to claim 4, wherein: the first phase-locked chip comprises an RFin pin, an X1 pin, an X2 pin and an IF pin, wherein the X1 pin is connected to the X2 pin through the first crystal oscillator, the RFin pin is connected with the first filter, and the IF pin is connected to the first output module through the fifth capacitor.
8. The KU dual local oscillator extended broadband dual output frequency demultiplier according to claim 4, wherein: the second phase-locked chip comprises an RFin2 pin, an X21 pin, an X22 pin and an IF2 pin, wherein the X21 pin is connected to an X22 pin through the second crystal oscillator, the RFin2 pin is connected with a second filter, and the IF2 pin is connected to a second output module through the fourteenth capacitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921468495.5U CN210578952U (en) | 2019-09-04 | 2019-09-04 | KU double-local-oscillator expansion type broadband double-output frequency demultiplier |
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| CN201921468495.5U CN210578952U (en) | 2019-09-04 | 2019-09-04 | KU double-local-oscillator expansion type broadband double-output frequency demultiplier |
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